The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces.
Characteristics or attributes of the outer boundaries of objects, including molecules.
The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods.
Identification and measurement of ELEMENTS and their location based on the fact that X-RAYS emitted by an element excited by an electron beam have a wavelength characteristic of that element and an intensity related to its concentration. It is performed with an electron microscope fitted with an x-ray spectrometer, in scanning or transmission mode.
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A mass-spectrometric technique that is used for microscopic chemical analysis. A beam of primary ions with an energy of 5-20 kiloelectronvolts (keV) bombards a small spot on the surface of the sample under ultra-high vacuum conditions. Positive and negative secondary ions sputtered from the surface are analyzed in a mass spectrometer in regards to their mass-to-charge ratio. Digital imaging can be generated from the secondary ion beams and their intensity can be measured. Ionic images can be correlated with images from light or other microscopy providing useful tools in the study of molecular and drug actions.
The gradual destruction of a metal or alloy due to oxidation or action of a chemical agent. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Compounds similar to hydrocarbons in which a tetravalent silicon atom replaces the carbon atom. They are very reactive, ignite in air, and form useful derivatives.
The adhesion of gases, liquids, or dissolved solids onto a surface. It includes adsorptive phenomena of bacteria and viruses onto surfaces as well. ABSORPTION into the substance may follow but not necessarily.
Chemical reactions effected by light.
The quality or state of being wettable or the degree to which something can be wet. This is also the ability of any solid surface to be wetted when in contact with a liquid whose surface tension is reduced so that the liquid spreads over the surface of the solid.
A type of scanning probe microscopy in which a probe systematically rides across the surface of a sample being scanned in a raster pattern. The vertical position is recorded as a spring attached to the probe rises and falls in response to peaks and valleys on the surface. These deflections produce a topographic map of the sample.
Diamond. A crystalline form of carbon that occurs as hard, colorless or tinted isomeric crystals. It is used as a precious stone, for cutting glass, and as bearings for delicate mechanisms. (From Grant & Hackh's Chemical Dictionary, 5th ed)
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).
A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.
The use of a quartz crystal microbalance for measuring weights and forces in the micro- to nanogram range. It is used to study the chemical and mechanical properties of thin layers, such as polymer coatings and lipid membranes; and interactions between molecues.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.
Stable elementary particles having the smallest known negative charge, present in all elements; also called negatrons. Positively charged electrons are called positrons. The numbers, energies and arrangement of electrons around atomic nuclei determine the chemical identities of elements. Beams of electrons are called CATHODE RAYS.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
Proteins that are chemically bound to a substrate material which renders their location fixed. The immobilization of proteins allows their use in chemical reactions without being diluted by solvent.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Binary compounds of oxygen containing the anion O(2-). The anion combines with metals to form alkaline oxides and non-metals to form acidic oxides.
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.
A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.
A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.
The development and use of techniques to study physical phenomena and construct structures in the nanoscale size range or smaller.
Materials used in the production of dental bases, restorations, impressions, prostheses, etc.
A genus of the family Heteromyidae which contains 22 species. Their physiology is adapted for the conservation of water, and they seldom drink water. They are found in arid or desert habitats and travel by hopping on their hind limbs.
Compounds containing the -SH radical.
Acrylic acids or acrylates which are substituted in the C-2 position with a methyl group.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds.
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
Polymers of ETHYLENE OXIDE and water, and their ethers. They vary in consistency from liquid to solid depending on the molecular weight indicated by a number following the name. They are used as SURFACTANTS, dispersing agents, solvents, ointment and suppository bases, vehicles, and tablet excipients. Some specific groups are NONOXYNOLS, OCTOXYNOLS, and POLOXAMERS.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Relating to the size of solids.
A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.
The theory that the radiation and absorption of energy take place in definite quantities called quanta (E) which vary in size and are defined by the equation E=hv in which h is Planck's constant and v is the frequency of the radiation.
Devices for accelerating protons or electrons in closed orbits where the accelerating voltage and magnetic field strength varies (the accelerating voltage is held constant for electrons) in order to keep the orbit radius constant.
An allotropic form of carbon that is used in pencils, as a lubricant, and in matches and explosives. It is obtained by mining and its dust can cause lung irritation.
Materials which have structured components with at least one dimension in the range of 1 to 100 nanometers. These include NANOCOMPOSITES; NANOPARTICLES; NANOTUBES; and NANOWIRES.
The offspring in multiple pregnancies (PREGNANCY, MULTIPLE): TWINS; TRIPLETS; QUADRUPLETS; QUINTUPLETS; etc.
A protein which is a subunit of RNA polymerase. It effects initiation of specific RNA chains from DNA.
Negatively charged atoms, radicals or groups of atoms which travel to the anode or positive pole during electrolysis.
Inorganic compounds that contain bromine as an integral part of the molecule.

Regenerating titanium ventricular assist device surfaces after gold/palladium coating for scanning electron microscopy. (1/174)

 (+info)

Analytical strategies for characterizing the surface chemistry of nanoparticles. (2/174)

 (+info)

XPS analysis of the dentin irradiated by Er: YAG laser. (3/174)

The aim of this study was to investigate the effect of Er:YAG laser irradiation on human dentin surface using X-ray photoelectron spectroscopy (XPS). 10 human dentin disks were prepared from extracted human molars for XPS analysis. These specimens were divided into two groups of five: a control group and group that were irradiated by an Er:YAG laser beam (100 mJ, 1Hz). All specimens were analyzed by XPS over a wide scanning range and narrow scanning ranges. The Ca/P ratio was calculated from the XPS results. In the results, the binding energies of Ca, P, and N in the laser-irradiated group were higher than those in the control group. The Ca/P ratio of the Er:YAG laser irradiated group (1.24+/-0.05) was significantly lower than that of the control group (1.52+/-0.16). This study showed that Er:YAG laser irradiation decreased Ca/P ratio and denatured the collagen of human dentin.  (+info)

Characterization of calcium phosphate deposited on valve metal by anodic oxidation with polarity inversion. (4/174)

Electrochemical deposition of calcium phosphate (CAP) on valve metals such as Ta, Nb, and Zr, was performed by anodic oxidation with alternate polarity inversion at an applied 20 VDC. A saturated hydroxyapatite(HAP)-phosphoric acid solution (pH 3) was used as the electrolyte. FTIR, XRD, and XPS were employed to investigate the detailed characteristics of the deposition. HAP was precipitated on Ta; HAP including brushite and monetite on Nb; and HAP and monetite on Zr. The Ca/P atomic ratios were 1.3-1.5 by XPS, and HPO(4)(2- )bands were detected on Ta by FTIR. Therefore, the HAP precipitated on Ta was a Ca-deficient HAP. In addition, the XPS spectra of the specimens showed that phosphate ions were incorporated into the anodic oxide film. Deposits with nano-grain size were observed by AFM. The results confirmed that CAP with nano-grain size was deposited on valve metals by the anodic oxidation with polarity inversion.  (+info)

XPS and ToF-SIMS investigation of alpha-helical and beta-strand peptide adsorption onto SAMs. (5/174)

 (+info)

Preparation of superhydrophobic polymeric film on aluminum plates by electrochemical polymerization. (6/174)

 (+info)

Mechanism of action of an imidopiperidine inhibitor of human polynucleotide kinase/phosphatase. (7/174)

 (+info)

X-ray photoelectron spectroscopy analysis of gold surfaces after removal of thiolated DNA oligomers by ultraviolet/ozone treatment. (8/174)

 (+info)

Global XPS (X-ray photoelectron spectroscopy) market is expected to reach USD 712.4 million by 2022, according to a new study by Grand View Research Inc. Growing application of XPS technology in different industries such as healthcare, semi conductors, aerospace, automotives, and electronics along with rising demand for research and development across all these industries is expected to drive the XPS market over the forecast period. In addition, rising popularity of hyphenated technologies and other technological advancements such as hard X-ray photoelectron spectroscopy (HAXPES) has prompted the growth of the X-ray photoelectron spectroscopy market. The ability of XPS to accurately identify contamination in the provided sample is also expected to contribute towards boosting usage rates. Rising demand for XPS technique for drug safety and medical research is expected to serve the market as a future growth opportunity. Presence of supportive government initiatives such as the Safe Use ...
In this study, we have developed a sensitive and selective glucose sensor using novel CuO nanosheets which were grown on a gold coated glass substrate by a low temperature growth method. X-ray differaction (XRD) and scanning electron microscopy (SEM) techniques were used for the structural characterization of CuO nanostructures. CuO nanosheets are highly dense, uniform, and exhibited good crystalline array structure. X-ray photoelectron spectroscopy (XPS) technique was applied for the study of chemical composition of CuO nanosheets and the obtained information demonstrated pure phase CuO nanosheets. The novel CuO nanosheets were employed for the development of a sensitive and selective non-enzymatic glucose sensor. The measured sensitivity and a correlation coefficient are in order 5.20 × 102 µA/mMcm2 and 0.998, respectively. The proposed sensor is associated with several advantages such as low cost, simplicity, high stability, reproducibility and selectivity for the quick detection of glucose.
We report the formulation of novel composite nanoparticles that combine the high transfection efficiency of cationic peptide-DNA nanoparticles with the biocompatibility and prolonged delivery of polylactic acid-polyethylene glycol (PLA-PEG). The cationic cell-penetrating peptide RALA was used to condense DNA into nanoparticles that were encapsulated within a range of PLA-PEG copolymers. The composite nanoparticles produced exhibited excellent physicochemical properties including size |200 nm and encapsulation efficiency |80%. Images of the composite nanoparticles obtained with a new transmission electron microscopy staining method revealed the peptide-DNA nanoparticles within the PLA-PEG matrix. Varying the copolymers modulated the DNA release rate |6 weeks in vitro. The best formulation was selected and was able to transfect cells while maintaining viability. The effect of transferrin-appended composite nanoparticles was also studied. Thus, we have demonstrated the manufacture of composite
TY - JOUR. T1 - Formation and photoelectron spectroscopy of nanoscale cluster anions of biphenyl, (BP) n - (n = 2-100). AU - Mitsui, Masaaki. AU - Matsumoto, Yukino. AU - Ando, Naoto. AU - Nakajima, Atsushi. PY - 2005/9/5. Y1 - 2005/9/5. N2 - Evolution of electronic structures of nanoscale biphenyl cluster anions, (BP) n - (n = 2-100), have been studied by photoelectron spectroscopy in a size-selective fashion. The energetics of vertical detachment energy (VDE) revealed negative electron affinity of a biphenyl molecule and substantial cluster reorganizations via electron attachment. Comparison of the VDE energetics with naphthalene cluster anions implied that the freezing (and/or melting) temperatures of the BP clusters may be much lower than those of naphthalene clusters.. AB - Evolution of electronic structures of nanoscale biphenyl cluster anions, (BP) n - (n = 2-100), have been studied by photoelectron spectroscopy in a size-selective fashion. The energetics of vertical detachment energy ...
Analysis of thaumasite, Ca₃Si(CO₃)(SO₄)(OH)₆.12(H₂O), by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD ...
Understanding of electrical and electrochemical devices in operating conditions is vital for development of new technologies. Many important characteristics that determine the performance of such devices lie on their surfaces and interfaces which significantly deviate from the bulk properties. However, particularly for the liquid based devices, carrying out surface analysis is challenging and requires highly sophisticated instrumentation. In this PhD. thesis, we aim to unravel the potential development on liquids, dielectrics as well as the liquid/solid interfaces during AC and DC excitation in a chemically resolved fashion using the UHV compatible non-aqueous liquids in a basic electrowetting on dielectrics configuration within X-Ray Photoelectron Spectroscopy (XPS) chamber. Low molecular weight Polyethylene glycol (PEG) and a particular ionic liquid Diethylmethyl(2-methoxyethyl)ammonium bis(trifluoromethylsulfonyl)imide [DEME][TFSI] are used to represent two extreme cases as being non-ionic ...
Polystyrene thin film surfaces are commonly used to study the interactions of macromolecules, such as proteins, with surfaces. Polystyrene films oxidized in UV light become more hydrophilic, however these surfaces have a limited shelf life because they are reduced over time. Experiments were performed to determine the effect of radiation duration and exposure time on the surface composition of photo-oxidized polystyrene thin films. Polystyrene (2 wt%) in toluene was spin-coated onto 1-cm² monocrystalline silicon squares, and annealed at 70 °C for 18 hours. Three sets of triplicate samples were irradiated in a UV-ozone cleaner for 0, 3, and 9 minutes. Film surface compositions were analyzed via X-ray Photoelectron Spectroscopy 6 hours after irradiation and after one week of air exposure. Overall oxidation level decreased after one week, and the oxidation structure varied with irradiation time. It is speculated that decreases in oxidation level were due to surface contamination and reduction ...
Zinc telluride films doped with gadolinium (ZnTe:Gd)-made by laser ablation and deposition-have been characterized by X-ray photoelectron spectroscopy (XPS) to determine the molecular species of the elements in the material and their presence as intentionally formed contaminants.
TY - JOUR. T1 - Mass spectra and photoelectron spectroscopy of negatively charged benzene clusters, (benzene)n- (n=53-124). AU - Mitsui, Masaaki. AU - Nakajima, Atsushi. AU - Kaya, Koji. AU - Even, Uzi. PY - 2001/10/1. Y1 - 2001/10/1. N2 - The threshold size and photoelectron study of neat negatively charged benzene clusters was carried out using a high-temperature and high-pressure valve to generate cold, large, negatively charged benzene clusters. It was found that there is an abrupt onset of formation of the (benzene)n- clusters occurring at size n=53, and the cluster distribution extended to above n,160. Benzene clusters smaller than the threshold size were also observed. Photoelectron spectroscopy revealed that the VDES of (benzene)n- with n = 53-124 fell within 0.4-0.6 eV.. AB - The threshold size and photoelectron study of neat negatively charged benzene clusters was carried out using a high-temperature and high-pressure valve to generate cold, large, negatively charged benzene clusters. ...
This dissertation reports and interprets the results of experiments in which photoelectron spectroscopy was performed on a variety of aromatic anions. In addition to these photoelectron studies, the results and conclusions of an experiment in which HCl is scattered off atomically flat Au (111) surfaces are also presented.. Photoelectron spectroscopy of the isomers of methylphenoxide reveals that these molecules display minimal vibrational excitation upon photodetachment, accessing the electronic ground and first excited state of the corresponding radicals. The photoelectron spectra of p-methylphenoxide reveal a photon energy dependence arising from electron autodetachment. The slow electron velocity map imaging (SEVI) technique was employed to obtain the electron affinities (EAs) of these radicals with an uncertainty of 1.4 meV. Combining the measured EAs with previously measured O-H bond dissociation energies in a thermodynamic cycle allows for the measurement of the acidities of the ...
X-ray Photoelectron Spectroscopy Study Of Adsorption Of (3-mercaptopropyl)trimethoxysilane And N-propyltriethoxysilane On A Rutile TiO2(110) Surface
The frontier electronic structures of Ru(tcterpy)(NCS)3 [black dye (BD)] and Ru(dcbpy)2(NCS)2 (N719) have been investigated by photoelectron spectroscopy (PES), X-ray absorption spectroscopy (XAS) and resonant photoelectron spectroscopy (RPES). N1s XAS has been used to probe the nitrogen contribution in the unoccupied density of states, and PES, together with RPES over the N1s edge, has been used to delineate the character of the occupied density of states. The experimental findings of the frontier electron structure are compared to calculations of the partial density of states for the nitrogens in the different ligands (NCS and terpyridine/bipyridine) and for Ru4d. The result indicates large similarities between the two complexes. Specifically, the valence level spectra show two well separated structures at low binding energy. The experimental results indicate that the outermost structure in the valence region largely has a Ru4d character but with a substantial character also from the NCS ...
Three features of small-molecule photoelectron spectroscopy are considered (1) The atom from which a photoelectron is emitted must have a recoil momentum equal to that of the emitted electron. This is shared among the various modes of motion of the ion, leading to rotational and vibrational excitation. Furthermore, any initial velocity of the atom (due to either translational, rotational, or vibrational motion) will lead to Doppler broadening. These effects are observable and can, in general, be accounted for by simple models. In some cases, however, the simple models fail and a deeper insight is necessary. (2) Inner-shell photoionization is essentially an atomic process, and it is expected that the intensity for emission of a photoelectron from the core of an atom in a molecule will be independent of its chemical environment. Recent measurements on the carbon 1s photoelectron spectra of three chloroethanes show that this is not the case. At energies not far above the ionization threshold there ...
You may also wish to search for items by Leopold, D. and Leopold. 26 matching references were found. Leopold, D.G.; Murray, K.K.; Miller, A.E.S.; Lineberger, W.C., Methylene: A study of the X3B1 and the 1A1 states by photoelectron spectroscopy of CH2- and CD2-, J. Chem. Phys., 1985, 83, 4849. [all data] Leopold, D.G.; Lineberger, W.C., A study of the low-lying electronic states of Fe2 and Co2 by negative ion photoelectron spectroscopy, J. Chem. Phys., 1986, 85, 51. [all data] Leopold, D.G.; Miller, A.G.; Lineberger, W.C., Determination of the singlet-triplet splitting and electron affinity of, o-benzyne by negative ion photoelectron spectroscopy, J. Am. Chem. Soc., 1986, 108, 1379. [all data] Leopold, D.G.; Miller, T.M.; Lineberger, W.C., Flowing afterglow negative ion photoelectron spectroscopy of dirhenium: Evidence for multiple bonding in Re2 and Re2-, J. Am. Chem. Soc., 1986, 108, 178. [all data] Murray, K.K.; Miller, T.M.; Leopold, D.G.; Lineberger, W.C., Laser photoelectron spectroscopy of ...
In our lab, we use several glove boxes to prepare membranes by VIPS, in which temperature is controlled, as well as relative humidity (from 20% to 100%). Dry cast process is achieved making use of ovens. Characterization of membrane is mainly performed at the Research and Development Center for Membrane Technology, outside the Engineering Building in which our lab is located. We use scanning electron microscope (SEM) and atomic force microscope (AFM) to characterize the structures. Porosity is assessed by nitrogen adsorption/desorption method. For surface chemical composition, FT-IR and x-ray photoelectron spectroscopy (XPS) tests, as well as X-ray diffraction (XRD) measurements for semi-crystalline and crystalline polymer membranes, are carried out. Mechanical properties of polymer membranes are evaluated performing tensile tests. Water contact angle, hydration capacity, protein adsorption, bacterial attachment and blood compatibility experiments are performed in collaboration with the ...
Ultra thin Al2O3 and HfO2 films (UP to similar to6 nm) were deposited on SiO2/Si wafers by atomic layer chemical vapour deposition (ALCVD(TM,1)) and studied by exsitu X-ray photoelectron spectroscopy (XPS) and spectroscopic ellipsometry (SE). The thickness of these high-k layers (including the thick... DRIVER (German) ...
Unravelling the intrinsic stucture and stability of charged anions in the gas-phase using photoelectron spectroscopy and mass spectroscopy ...
Felter, T. E. and Weinberg, W. H. and Lastushkina, G. Ya. and Zhdan, P. A. and Boreskov, G. K. and Hrbek, J. (1982) A photoelectron spectroscopy study of methanol adsorption and oxidation on Ag(111). Journal of Vacuum Science and Technology, 20 (3). pp. 887-888. ISSN 0022-5355. https://resolver.caltech.edu/CaltechAUTHORS:20120716-110746998 ...
You may also wish to search for items by Turner, D. and Turner. 51 matching references were found. Evans, S.; Green, J.C.; Green, M.L.H.; Orchard, A.F.; Turner, D.W., Study of the bonding in pentacarbonylmanganese derivatives by photoelectron spectroscopy, Faraday Discuss. Chem. Soc., 1969, 47, 112. [all data] Al-Joboury, M.I.; Turner, D.W., Molecular photo-electron spectroscopy. Part I. The hydrogen and nitrogen molecules, J. Chem. Soc., 1963, 5141. [all data] Al-Joboury, M.I.; Turner, D.W., Molecular photoelectron spectroscopy. Part II. A summary of ionization potentials, J. Chem. Soc., 1964, 4434. [all data] Turner, D.W.; Al-Joboury, M.I., Molecular photoelectron spectroscopy, Bull. Soc. Chim. Belges, 1964, 73, 428. [all data] Al-Joboury, M.I.; May, D.P.; Turner, D.W., Molecular photoelectron spectroscopy. Part IV. The ionisation potentials and configurations of carbon dioxide, carbon oxysulphide, carbon disulphide, and nitrous oxide, J. Chem. Soc., 1965, 6350. [all data] Al-Joboury, M.I.; ...
Electronic properties of clean unreconstructed 6H-SiC(0001) surfaces studied by angle resolved photoelectron spectroscopy Academic Article ...
Detail záznamu - Threshold Photoelectron Spectroscopy of the Methyl Radical Isotopomers, CH3, CH2D, CHD2 and CD3: Synergy between VUV Synchrotron Radiation Experiments and Explicitly Correlated Coupled Cluster Calculations - Detail záznamu - Knihovna Akademie věd České republiky
AbeBooks.com: Photoelectron Spectroscopy (9780408705592) by J.H.D. Eland and a great selection of similar New, Used and Collectible Books available now at great prices.
Photoemission spectroscopy (PES), also known as photoelectron spectroscopy,[1] refers to energy measurement of electrons emitted from solids, gases or liquids by the photoelectric effect, in order to determine the binding energies of electrons in a substance. The term refers to various techniques, depending on whether the ionization energy is provided by an X-ray photon, an EUV photon, or an ultraviolet photon. Regardless of the incident photon beam however, all photoelectron spectroscopy revolves around the general theme of surface analysis by measuring the ejected electrons.[2] X-ray photoelectron spectroscopy (XPS) was developed by Kai Siegbahn starting in 1957 [3][4] and is used to study the energy levels of atomic core electrons, primarily in solids. Siegbahn referred to the technique as Electron Spectroscopy for Chemical Analysis (ESCA), since the core levels have small chemical shifts depending on the chemical environment of the atom which is ionized, allowing chemical structure to be ...
The use of X-ray photoelectron spectroscopy (XPS) is expanding rapidly with the advent of more convenient, high-resolution laboratory-based instruments. The increase in the numbers and distribution of synchrotrons has also fuelled this burgeoning interest. Powell (C. J. Powell, J. Vac. Sci. Technol. A 21 (S42) 2003) has shown that the number of papers published on or using XPS has doubled in the past 10 years. He reports that there are in excess of 3000 papers published using XPS data each year across a wide range of applications, making it the most important technique for the determination of the composition of nano-scale surface films. Yet XPS and the associated technique of Auger-electron spectroscopy (AES) are not yet developed to the stage where the data and its interpretation are unambiguous. Auger photoelectron coincidence spectroscopy (APECS) provides a means of simplifying spectra, allowing for the decomposition of these into components that have a common origin. The spectra so produced ...
The global XPS market was valued at USD 439.64 million in 2014 and is expected to grow at a CAGR of 6.2% over the forecast period. Increasing global demand for medical research, pure and safe drugs, minimal medication error and technological advancements are some key drivers of the XPS market
The aim of this study was to develop a thermally and operationally stable trypsin through covalent immobilization onto chitosan magnetic nanoparticles (Fe3O4 @CTS). The successful preparation of the Fe3O4 @CTS nanoparticles was verified by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM), which indicated that the prepared Fe3O4 @CTS nanoparticles have superparamagnetic properties, with an average size of approximately 17 nm. Then, trypsin was covalently immobilized onto the Fe3O4 @CTS nanoparticles at a high loading capacity (149.25 mg/g). The FTIR data demonstrated that the trypsin had undergone a conformational change compared with free trypsin, and the Michaelis constant (Km) and the maximum hydrolysis reaction rate (Vmax) showed that the trypsin immobilized on the Fe3O4 @CTS had a lower affinity for BAEE and lower activity compared with free trypsin. However, the immobilized trypsin ...
The oxidation of group three nitride semiconductors is an important aspect in the fabrication of high power transistors with insulated gates. Gallium nitride (GaN) and its alloys (AlGaN) have electrical properties that are ...
From reference [1] it is found that oxygen bound to organic components can range in binding energy from as low as 530.9 eV to as high as 533.8 eV (corrected here to C 1s (C-C, C-H) at 284.8 eV). The more common organic oxygen species (alcohols, esters, ketones, ethers and organic acids) are found in a range from 532.0 - 533.7 eV. This post shows a very handy table of organic oxygen species. ...
Polyfluorenes with pendant alkoxysilyl groups have been used to prepare inorganic-organic composite nanoparticles (diameter = 80-220 nm) in which the conjugated polymer is dispersed within a silica matrix. Preparation of these nanoparticles is achieved by simultaneous nanoprecipitation of the conjugated polymer and hydrolysis/crosslinking of the alkoxysilyl groups under basic conditions. The composition of the nanocomposites is controlled by addition of an alkoxysilane monomer, tetramethylorthosilicate. The hybrid nanoparticles form highly stable dispersions in water and buffer (pH 9.2). The size of the nanoparticles can be tuned by varying the amount of the alkoxysilane monomer added during the nanoprecipitation process. Increasing the relative amount of alkoxysilane monomer also increases the proportion of polyfluorene chains that adopt the higher energy β-phase conformation within the resultant nanoparticles. Nanoparticles with the highest silica content were found to have increased ...
Annenkov, V.V.; Danilovtseva, E.N.; Pal'shin, V.A.; Aseyev, V.O.; Petrov, A.K.; Kozlov, A.S.; Patwardhan, S.V.; Perry, C.C., 2011: Poly(vinyl amine)-silica composite nanoparticles: models of the silicic acid cytoplasmic pool and as a silica precursor for composite materials formation
Page contains details about example of encapsulated thermochromic material/light absorbing material/double-wall carbon nanotube composite nanoparticles . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Page contains details about example of thermochromic material/light absorbing material/double-wall carbon nanotube composite nanoparticles . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
In heterogeneous catalysis, characterization of heterogeneous metal interfaces of bimetallic catalysts is a crucial step to elucidate the catalytic performance and is a key to develop advanced catalysts. However, analytical techniques such as X-ray photoelectron spectroscopy can only work in vacuum conditions and are difficult to use for in situ analysis. Here, we present efficient and convenient core-shell nano particle-enhanced Raman spectroscopy to explore the in situ electronic structures of heterogeneous interfaces ([email protected] and [email protected] core-shell NPs) by varying the shell thickness. The experimental observations reported here clearly show that Pd donates electrons to Au, while Pt accepts electrons from Au at the heterogeneous interfaces. This conclusion gains further support from ex situ X-ray photoelectron spectroscopy results. The Au core greatly affects the electronic structures of both the Pd and Pt shells as well as catalytic behaviors. Finally, the as prepared core-shell nanoparticles ...
Photosynthesis, i.e. the conversion of sun light into stored chemical energy by plants and other organisms, is one of the most important global biological processes. In light of increasing energy prices, limited fossil fuel resources and rising environmental concerns, researchers have long dreamed of reproducing this natural process in order to address the challenge of sustainable and eco-friendly energy production. A particularly difficult photosynthetic step to replicate is the oxidation of water and concomitant production of oxygen, which, in artificial systems, require the use of catalysts that are both reactive and stable. In a recent study researchers probed changes in an iridium oxide catalyst during water oxidation, providing crucial insights into the catalytic performance of this material.
The interface formation upon vapor deposition of a metal onto a molecular organic semiconductor was studied using a well-defined complexation reaction between a metal and a porphyrin. Specifically, metallic cobalt (Co) was vapor deposited onto a thin film of 2H-tetraphenylporphyrin (2HTPP) at room temperatur
Modifications were made to the fraction with a particle size less than 150 μm, which was separated from the raw vermiculite through sieving, with no prior purification, and had a cationic exchange capacity of 1.10 meq g-1 (Campos, et al., 2009).. Charge reduction treatment. Natural vermiculite was submitted to hydrothermal treatment, aiming its charge reduction at 400 °C under a partial water vapor pressure of 75% in nitrogen, according to conditions established previously (Cristiano, et al., 2005). This solid was used as a starting material in the synthesis and labeled as H400V75.. With the purpose of achieving more efficiency during the process of inserting the pillaring species within the clay layers, H400V75 was then homoionized with sodium by adding a 3 M sodium chloride solution to a suspension of the solid at 5% p/v under constant magnetic stirring for one hour at 80°C. Finally, the clays were washed with distilled water and dried in air at 60°C.. Modification with Al-Zr, Al-Hf and ...
X-ray photoelectron spectroscopy (XPS) has been used to investigate the evolution of surface chemistry of YBa2Cu3O7-delta (Y123) films prepared by the metalorganic deposition (MOD) process using trifluoroacetate (TFA) precursors. Detailed XPS core-level spectra obtained from the samples quenched from various points during the calcining and firing stages have been reported for the first time and are used to identify surface species. The XPS data show evidence of formation of intermediate phases such as Y-O-F, BaF2, and CuO during the calcining process, which are the decomposition products of yttrium, barium, and copper trifluoroacetates, respectively. The TFA precursors are completely decomposed at the end of calcination. The change of binding energies for Y 3d(5/2), Ba 3d(5/2), and O ls during the firing process indicates that Y123 starts to form at 800 degrees C after 0.5 h firing. Based on the experimental results, an alternative mechanism of the chemical evolution from precursor to final film in the
Compounds forming alloys with lithium, such as silicon or tin, are promising negative electrode materials for the next generation of Li-ion batteries due to their higher theoretical capacity compared to the current commercial electrode materials.. An important issue is to better understand the phenomena occurring at the electrode/electrolyte interfaces of these new materials. The stability of the passivation layer (SEI) is crucial for good battery performance and its nature, formation and evolution have to be investigated. It is important to follow upon cycling alloying/dealloying processes, the evolution of surface oxides with battery cycling and the change in surface chemistry when storing electrodes in the electrolyte.. The aim of this thesis is to improve the knowledge of these surface reactions through a non-destructive depth-resolved PES (Photoelectron spectroscopy) analysis of the surface of new negative electrodes. A unique combination utilizing hard and soft-ray photoelectron ...
TY - JOUR. T1 - Sigma-pi interactions in non-conjugated polyalkynes. T2 - A photoelectron spectroscopic study. AU - Lichtenberger, Dennis L.. AU - Subramanian, Lalitha. AU - Bunz, Uwe. AU - Vollhardt, K. Peter C.. PY - 1994/1/1. Y1 - 1994/1/1. N2 - Through-space and through-bond interactions between π-orbitals in the molecules hepta-1,6-diyne (A), 3,3-diethylpenta-1,4-diyne (B), 4,4-diprop-2-ynylhepta-1,6-diyne (C), 2,2-di(bromomethyl)-1,3-dibromopropane (D) and 4,4-diethynylhepta-1,6-diyne (E) have been studied using gas-phase HeI photoelectron spectroscopy. The assignments of the photoelectron bands are discussed in relation to the results of extended Hückel calculations. Mixing of the π orbitals with the σ bond framework of the molecules is revealed by broadened band profiles in the π ionization region. Detailed examination of the first ionization of A suggests that one conformation is predominant under the conditions of the experiment. The terminal π orbitals are separated by too great ...
Surface chemical compositions of starch nanocrystals (SNC) prepared using sulfuric acid (H2SO4) and hydrochloric acid (HCl) hydrolysis were analyzed by X-ray photoelectron spectroscopy (XPS) and FT-IR. The results showed that carboxyl groups and sulfate esters were presented in SNC after hydrolysis with H2SO4, while no sulfate esters were detected in SNC during HCl-hydrolysis. TEM results showed that, compared to H2SO4-hydrolyzed sample, a wider size distribution of SNC prepared by HCl-hydrolysis were observed. Zeta-potentials were −23.1 and −5.02 mV for H2SO4- and HCl-hydrolyzed SNC suspensions at pH 6.5, respectively. Nevertheless, the zeta-potential values decreased to −32.3 and −10.2 mV as the dispersion pH was adjusted to 10.6. After placed 48 h at pH 10.6, zeta-potential increased to −24.1 mV for H2SO4-hydrolyzed SNC, while no change was detected for HCl-hydrolyzed one. The higher zeta-potential and relative small particle distribution of SNC caused more stable suspensions compared to
ENERGIZE is a collaborative effort of the Helmholtz-Zentrum Berlin, the Humboldt Universität zu Berlin (HU) and the Integrative Research Institute for the Sciences Adlershof (IRIS). The goal of this project is to build and operate a beamline with a suitable end-station for materials science in the field of energy research. The new dipole-PGM (plane grating mirror) beam-line is optimized for the 20 eV to 1.5 keV energy range, which is ideally suited to perform ultraviolet photoelectron spectroscopy (UPS), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) measurements. In addition, an attenuator system will be installed, to allow measurements on radiation sensitive samples (,5 pA/cm² sample current).. ...
Silanization has emerged in recent years as a way to obtain a stronger and more stable attachment of biomolecules to metallic substrates. However, its impact on protein conformation, a key aspect that influences cell response, has hardly been studied. In this work, we analyzed by atomic force microscopy (AFM) the distribution and conformation of type I collagen on plasma-treated surfaces before and after silanization. Subsequently, we investigated the effect of the different collagen conformations on fibroblasts adhesion and fibronectin secretion by immunofluorescence analyses. Two different organosilanes were used on plasma-treated titanium surfaces, either 3-chloropropyl-triethoxy-silane (CPTES) or 3-glycidyloxypropyl-triethoxy-silane (GPTES). The properties and amount of the adsorbed collagen were assessed by contact angle, X-ray photoelectron spectroscopy, optical waveguide lightmode spectroscopy, and AFM. AFM studies revealed different conformations of type I collagen depending on the ...
Microscopy, Electrode, Scanning Tunneling Microscopy, Anions, Hydrogen, Adsorption, Role, Solutions, Absorption, Photoelectron Spectroscopy, Spectroscopy, X-ray, X-ray Photoelectron Spectroscopy, Crystallization, Device, Growth, Paper, Semiconductors, Axis, Molecular Structures
We report the 488 nm photoelectron spectrum of the NbCr$^{-}$ anion. For the $^{2}\Delta$ ground state of neutral NbCr, the short bond length (1.894 \AA) and high bond energy (D$_0$ 3.0263(6) eV) measured by R2PI spectroscopy indicate high order multiple bonding. We find that the NbCr$^{-}$ anion has a $^{1}\Sigma^{+}$ ground state, in which the extra electron occupies the (4d)$\delta$ bonding orbital, giving a $1\sigma^{2}1\pi^{4}1\delta^{4}2\sigma^{2}$ valence electron configuration and a formal bond order of 6. Low-lying excited states of NbCr (assigned as two $^{2}\Sigma^{+}$ states) and NbCr$^{-}$ ($^{3}\Delta$) are also observed. The spectra provide the electron affinity of NbCr, energies of the $^{2}\Sigma^{+}$ and the $^{3}\Delta$ excited states, vibrational frequencies for the NbCr and NbCr$^{-}$ ground states and for the $^{2}\Sigma^{+}$ excited states, and (from Franck-Condon analyses) differences among the bond lengths of the observed states. These results are compared with our ...
2000) Line structure in photoelectron and Auger electron of CuOx/Cu and Cu by Auger photoelectron coincidence spectroscopy (APECS). In: 11th International Conference on Quantitative Surface Analysis, 3 - 7 July, Guildford, Surrey, UK. ...
The electroactive polymers most commonly studied during the past decade include polyacetylene, polyaniline, polypyrrole, polythiophene, polyphenylene, poly(phenylene sulfide), poly(phenylene vinylenel and some non-conjugated polymers, such as the polyvinylpyridine and poly(N-vinyl-carbazole). These polymers along with their analogs and derivatives have been selected to illustrate the type and level of information which can be obtained by the X-ray photoelectron spectroscopic (XPS) technique. It is demonstrated that XPS provides an excellent tool for evaluating the three most important physicochemical properties associated with these polymers, viz., the intrinsic structure, the charge transfer interaction, and the stability and degradation behavior. Some future research directions may involve surface modified or functionalized materials, as well as the application of more surface-sensitive techniques, such as secondary ion mass spectroscopy (SIMS) and scanning tunneling microscopy (STM), which ...
The structure of Nb3O and Nb3O+ determined by pulsed field ionizationâ€zero electron kinetic energy photoelectron spectroscopy and density functional theory. Yang, Dong-Sheng; Zgierski, Marek Z.; Rayner, David M.; Hackett, Peter A.; Martinez, Ana; Salahub, Dennis R.; Roy, Pierre-Nicholas; Carrington, Tucker // Journal of Chemical Physics;10/1/1995, Vol. 103 Issue 13, p5335 The geometrical structures of the ground states of triniobium monoxide, Nb3O, and its cation, Nb3O+, have been determined by an experimental and theoretical study. Vibrationally resolved photoelectron spectra of an Nb3O cluster beam were obtained at 100 and 300 K using the pulsed field... ...
The negligible volatility of ionic liquids allows them to be studied by applying ultrahigh vacuum (UHV) techniques, i.e. X-ray photoelectron spectroscopy (XPS). Consequently, this Thesis describes the XPS of ionic liquid-based metal catalytic systems. Correlation between the binding energy derived from XPS and reaction performance is extensively discussed and used to design a catalytic system for the Suzuki cross coupling reaction. To allow comparable information for the solute dissolved in ionic liquids to be obtained, pure ionic liquids and ionic liquid mixtures are analysed. Fitting models of C 1 s spectra for different ionic liquid families are presented. Charge correction methods, specifically the influence of anion basicity on charge correction, are discussed in detail. The cation-anion interaction is investigated for different families of ionic liquids with single and mixed anions. The interaction between catalysts and ionic liquids can also be demonstrated by XPS. The formation of ...
Adsorption of a basic dye, methylene blue, from aqueous solutions onto as-received activated carbons and acid-treated carbons was investigated. The physical and surface chemical properties of the activated carbons were characterized using BET-N(2) adsorption, X-ray photoelectron spectroscopy (XPS), and mass titration. It was found that acid treatment had little effect on carbon textural characteristics but significantly changed the surface chemical properties, resulting in an adverse effect on dye adsorption. The physical properties of activated carbon, such as surface area and pore volume, have little effect on dye adsorption, while the pore size distribution and the surface chemical characteristics play important roles in dye adsorption. The pH value of the solution also influences the adsorption capacity significantly. For methylene blue, a higher pH of solution favors the adsorption capacity. The kinetic adsorption of methylene blue on all carbons follows a pseudo-second-order ...
Heptacene was generated by surface-assisted didecarbonylation of an α-diketone precursor on a Ag(111) surface. Monitoring of the surface reaction and characterization of the adsorbed heptacene was performed with scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine structure (NEXAFS) spectroscopy, and density functional theory (DFT) calculations. The surface-assisted formation of heptacene occurs around 460 K. Both the heptacene and the precursor molecules are oriented along the high-symmetry directions of the (111) surface and their molecular π systems face towards the substrate. The interaction with the Ag(111) substrate is not laterally uniform, but appears to be strongest on the central part of the molecule, in line with the expectations from Clars rule. In the STM images, heptacene shows a dumbbell shape, which may correspond to the substantial out-of-plane deformations of heptacene on Ag(111). As revealed by DFT, the center of the ...
TY - JOUR. T1 - Synthesis and characterization of mercaptoethanol capped zinc oxide nanoparticles capped with organic molecules. AU - Chimanpure, J.. AU - Ashtaputre, S.. AU - Marathe, S.. AU - Hebalker, N.. AU - Kharrazi, S.. AU - Pasricha, Renu. AU - Kulkarni, S. K.. PY - 2006/4/3. Y1 - 2006/4/3. N2 - Synthesis of Zinc oxide ZnO nanoparticles has been carrried out using a chemical route. Stability of the size has beeb achieved using mercaptoethanol as a surface capping molecules. Infra red spectroscopy and x-ray photoelectron spectroscopy analyis confirm the presence of capping molecules on the ZnO particle surface. Strong green photoluminescence was observed at ∼534 nm from all the nanoparticles.. AB - Synthesis of Zinc oxide ZnO nanoparticles has been carrried out using a chemical route. Stability of the size has beeb achieved using mercaptoethanol as a surface capping molecules. Infra red spectroscopy and x-ray photoelectron spectroscopy analyis confirm the presence of capping molecules ...
An ultra-facile fabrication process for the preparation of phosphorus doped porous carbon nanofibers (P-PCNFs) through the electrospinning and heat treatment method has been studied. The materials were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. Studies showed that fabricated P-PCNFs have unique porous fibers structures, large specific surface area (462.83 cm2 g−1), and abundant microporous and mesoporous structures. X-ray photoelectron spectroscopy analyses revealed that the contents of phosphorus and electrochemical properties in a series of P-PCNF samples can be tuned by controlling the polyphosphoric acid concentration. The electrochemical properties of the materials were evaluated using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. Studies showed that the specific capacitance of the fabricated P-PCNFs using the ultra-facile process reached up to 228.7 F g−1 at 0.5 A g−1 in 1 M ...
The electronic structures of complex systems have been studied by theoretical calculations of soft x-ray spectroscopies like x-ray photoelectron spectroscopy, near edge x-ray absorption fine structure, and x-ray emission spectroscopies. A new approach based on time dependent density functional theory has been developed for the calculation of shake-up satellites associated with photoelectron spectra. This method has been applied to the phthalocyanine molecule, describing in detail its electronic structure, and revealing the origin of controversial experimental features. It is illustrated in this thesis that the theoretical intepretation plays a fundamental role in the full understanding of experimental spectra of large and complex molecular systems. Soft x-ray spectroscopies and valence band photoelectron spectroscopies have proved to be powerful tools for isomer identification, in the study of newly synthesized fullerene molecules, the azafullerene C48N12 and the C50Cl10 molecule, as well as for ...
The electronic structures of complex systems have been studied by theoretical calculations of soft x-ray spectroscopies like x-ray photoelectron spectroscopy, near edge x-ray absorption fine structure, and x-ray emission spectroscopies. A new approach based on time dependent density functional theory has been developed for the calculation of shake-up satellites associated with photoelectron spectra. This method has been applied to the phthalocyanine molecule, describing in detail its electronic structure, and revealing the origin of controversial experimental features. It is illustrated in this thesis that the theoretical intepretation plays a fundamental role in the full understanding of experimental spectra of large and complex molecular systems. Soft x-ray spectroscopies and valence band photoelectron spectroscopies have proved to be powerful tools for isomer identification, in the study of newly synthesized fullerene molecules, the azafullerene C48N12 and the C50Cl10 molecule, as well as for ...
Copper, Gold, Nitrogen, Donor, Ftir, Immobilization, Laccase, Lipase, Mass Spectrometry, Photoelectron Spectroscopy, Role, Secondary Ion Mass Spectrometry, Set, Spectrometry, Spectroscopy, Time, X-ray, X-ray Photoelectron Spectroscopy
This article describes a simple method for the construction of a universal surface chemical gradient platform based on the biotin streptavidin model. In this approach, surface chemical gradients were prepared in poly(methyl methacrylate) (PM MA), a biocompatible polymer, by a controlled hydrolysis procedure. The physicochemical properties of the resulting modified surfaces were extensively characterized. Chemical analysis carried out via time-of-flight secondary ion mass spectrometry (ToRSIMS) and X-ray photoelectron spectroscopy (XPS) showed the formation of a smooth, highly controllable carboxylic acid gradient of increasing concentration along the sample surface. Atomic force microscopy (AFM) and contact angle (CA) results indicate that, in contrast with most of the chemical gradient methods published in the literature, the chemical modification of the polymer surface barely affects its physical properties. The introduction of carboxylic acid functionality along the surface was then used for ...
Microarrays are a versatile platform for diagnostics and high-throughput analysis. Carbohydrate microarrays are valuable tools to investigate interactions with other molecules since many glycans are involved in fundamental biological processes. A combined X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) surface analysis was used to investigate the basic steps in the production of carbohydrate microarrays. The preparation included coupling of a thiol-terminated mannoside to maleimide-functionalized glass surfaces derived from γ-aminopropyl silane (GAPS) slides. XPS results clearly demonstrate successful chemical modification in each fabrication step, and ToF-SIMS imaging revealed immobilized carbohydrates in the spotted regions of the final microarray.
Microarrays are a versatile platform for diagnostics and high-throughput analysis. Carbohydrate microarrays are valuable tools to investigate interactions with other molecules since many glycans are involved in fundamental biological processes. A combined X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) surface analysis was used to investigate the basic steps in the production of carbohydrate microarrays. The preparation included coupling of a thiol-terminated mannoside to maleimide-functionalized glass surfaces derived from γ-aminopropyl silane (GAPS) slides. XPS results clearly demonstrate successful chemical modification in each fabrication step, and ToF-SIMS imaging revealed immobilized carbohydrates in the spotted regions of the final microarray.
We report the formation of beryllium doped plasma polymerized coatings derived from a helical resonator deposition apparatus, using diethylberyllium as the organometaric source. These coatings had an appearance not unlike plain plasma polymer and were relatively stable to ambient exposure. The coatings were characterized by Inductively Coupled Plasma Mass Spectrometry and X-Ray Photoelectron Spectroscopy. Coating rates approaching 0.7 {mu}m hr{sup {minus}1} were obtained with a beryllium-to-carbon ratio of 1:1.3. There is also a significant oxygen presence in the coating as well which is attributed to oxidation upon exposure of the coating to air. The XPS data show only one peak for beryllium with the preponderance of the XPS data suggesting that the beryllium exists as BeO. Diethylberyllium was found to be inadequate as a source for beryllium doped plasma polymer, due to thermal decomposition and low vapor recovery rates.
Cell surface hydrophobicity is one of the most important factors controlling adhesion of microorganisms to surfaces. In this paper, cell surface properties of lactobacilli and recombinant lactobacilli with and without a surface layer protein (SLP) associated with cell surface hydrophobicity were determined, including water contact angles, zeta potentials as a function of pH, the nitrogen contents of the cell surface and adhesion to hexadecane. Two strains possessing an S-layer (Lactobacillus acidophilus ATCC4356 and L. crispatus JCM5810) showed the highest water contact angles (76 and 55°, respectively) and the highest N/C surface concentration ratios by X-ray photoelectron spectroscopy (0.172 and 0.160, respectively), indicative of the presence of S-layer proteins. L. casei 393*/CA5′A, with the SLP of L. crispatus JCM5810 anchored to its surface had higher water contact angles (62°) than its parent strain (32°), but no higher amount of cell surface nitrogen. However, anchoring of the SLP ...
The authors report the chemical influence of cleaning of the Ru capping layer on the extreme ultraviolet (EUV) reflector surface. The cleaning of EUV reflector to remove the contamination particles has two requirements: to prevent corrosion and etching of the reflector surface and to maintain the reflectivity functionality of the reflector after the corrosive cleaning processes. Two main approaches for EUV reflector cleaning, wet chemical treatments [sulfuric acid and hydrogen peroxide mixture (SPM), ozonated water, and ozonated hydrogen peroxide] and dry cleaning (oxygen plasma and UV/ozone treatment), were tested. The changes in surface morphology and roughness were characterized using scanning electron microscopy and atomic force microscopy, while the surface etching and change of oxidation states were probed with x-ray photoelectron spectroscopy. Significant surface oxidation of the Ru capping layer was observed after oxygen plasma and UV/ozone treatment, while the oxidation is unnoticeable after
X-ray photoelectron spectroscopy (XPS) has been utilized as a versatile method for thickness characterization of various two-dimensional (2D) films. Accurate thicknesses can be measured simultaneously while acquiring XPS data for chemical characterization for 2D film thickness up to approximately 10 nm (,10 nm). For validating the developed technique, thicknesses of few-layer graphene (FLG), MoS2 and amorphous BN layers, produced by MPCVD, PECVD, and PLD respectively, are accurately measured. The ratio between photoemission peaks recorded for the films (C 1s, Mo 3d, B1s) and the substrates (Cu 2p, Si 2p, Al 2p) is the primary input parameter for the thickness calculation, in addition to the atomic densities of the substrate and the film, and corresponding electron attenuation length ...
These are stages of chemical reactions involved in the deposition of oxygen-deficient tantalum oxide films (left) and the results of their analysis by X-ray photoelectron spectroscopy (right)
Soft X-ray photoelectron spectroscopy was used to investigate the fundamental surface chemistry of both AlGaN and GaN surfaces in the context of understanding the behaviour of AlGaN/GaN heterostructures as chemical field-effect transistor (CHEMFET) ion sensors. AlGaN and GaN samples were subjected to different methods of oxide growth (native oxide and thermally grown oxide) and chemical treatment conditions. Our investigations indicate that the etching of the oxide layer is more pronounced with AlGaN compared to GaN. Also, we observed that chloride ions have a greater tendency to attach to the GaN surface relative to the AlGaN surface. Furthermore, chloride ions are comparatively more prevalent on surfaces treated with 5% HCl acid solution. The concentration of chloride ions is even higher on the HCl treated native oxide surface resulting in a very clear deconvolution of the Cl 2p1/2 and Cl 2p3/2 peaks. For GaN and AlGaN surfaces, a linear response (e.g. source-drain current) is typically seen ...
TiNiCu films were successfully prepared by co-sputtering of a TiNi target and a separate Cu target. Surface and cross-section microstructures of the deposited coating were analysed using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). Results showed that the deposited coating had fine grain size of about 300 to 400 nm and fully martensitic structure under room temperature. X-Ray Photoelectron Spectroscopy (XPS) indicated that there was an adherent and stable TiO2 oxide film on TiNiCu film surface, which can prevent Ni element from delamination. The deposited TiNiCu film has relatively strong (11 1) and (111) and relatively weak (010) texture. Results from Differential Scanning Calorimeter (DSC), in-situ X-Ray Diffraction (XRD) and curvature measurement revealed clearly martensitic transformation of the deposited TiNiCu films upon heating and cooling. Freestanding TiNiCu thin film showed clearly pronounced two-way shape memory ...
Soft magnetic composites (SMCs) are designed for the sustainable industrial production of uniform isotropic components with three-dimensional magnetic properties. The nanocoating covering the surface of water-atomized iron powder is the paramount feature of SMC technology that gives the material the high resistivity needed for minimizing the negative effects of eddy currents. An analysis of its initial state/composition on a micro level and any changes during further compaction and heat treatment is thus of great importance. Therefore, a method for the evaluation of composition and thickness of such insulating coatings was developed in this study. High resolution imaging combined with surface analytical and depth profiling techniques (high resolution scanning electron microscopy (HR SEM) with energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy) were used. Analyses were performed on commercially available SMC powder grades having a phosphate-based coating. Depth profiling was
The methods to be included are X-ray analysis in the electron microscope by energy dispersive and wavelength dispersive spectrometry (EDS and WDS); surface analysis by X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES); together with the ion beam techniques of secondary ion mass spectrometry (SIMS) and Rutherford backscattering spectrometry (RBS). Structure determination by X-ray and electron diffraction (XRD and ED) will also be included.. The module is directed at scientists and engineers who require a grounding in these methods for trouble-shooting investigations or longer term research projects. The basic principles used for the physical characterisation of materials will be outlined; microscopy by light, electrons and scanned probes will be introduced and the readily available bulk characterisation methods such as diffraction, X-ray analysis and vibrational spectroscopies will be described. Surface analysis be electron and ion spectroscopies will also form and ...
DOI: 10.11607/jomi.4415 Purpose: The aim of this study was to compare strontium-containing implant (Sr-Ti) surfaces with modified pure Ti (Mod Ti) on the promotion of osteogenesis in vitro and in vivo. Materials and Methods: The Sr-Ti surfaces were fabricated by hydrothermal treatment. The Mod Ti surfaces were used as a control. These surfaces were characterized with scanning electron microscopy, x-ray diffractometer, and x-ray photoelectron spectroscopy. The biologic activity was analyzed by initial adhesion, proliferation, alkaline phosphatase (ALP), osteocalcin, and osteogenesis-related genes in vitro. Hematoxylin and eosin (H&E) staining and immunohistochemistry analysis of tissue adjacent to this implant were used to evaluate osteogenic activity in vivo. Results: The results confirmed multiple nanogranules on the Sr-Ti surface composed of well-crystallized TiO2 and SrTiO3 phases. Long-term release of Sr enhanced mesenchymal stem cell (MSC) initial adhesion, the production of ALP, ...
The frontier electronic structures of a series of organic dye molecules containing a triphenylamine moiety, a thiophene moiety and a cyanoacrylic acid moiety have been investigated by photoelectron spectroscopy (PES), X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy (XES) and resonant photoelectron spectroscopy (RPES). The experimental results were compared to electronic structure calculations on the molecules, which are used to confirm and enrich the assignment of the spectra. The approach allows us to experimentally measure and interpret the basic valence energy level structure in the dye, including the highest occupied energy level and how it depends on the interaction between the different units. Based on N 1s X-ray absorption and emission spectra we also obtain insight into the structure of the excited states, the molecular orbital composition and dynamics. Together the results provide an experimentally determined energy level map useful in the design of these types of ...
The adsorption of nitrogen dioxide on gamma aluminium oxide (γ-Al2O3) and alpha iron oxide (α-Fe2O3) particle surfaces under various conditions of relative humidity, presence of molecular oxygen and UV light has been investigated. X-Ray photoelectron spectroscopy (XPS) is used to monitor the different surfac
In this work, platinum (Pt), titanium (Ti) and silver (Ag) doped graphene oxide (GO) nanostructures were synthesized by using sonochemical technique, a relatively new technique in nanomaterial synthesis, and characterized in detail. The synthesized nanomaterials were characterized utulizing transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). TEM images and XPS spectras showed that the dopping process was successful. In addition, a multilayer graphene oxide-silver nanoparticles (M-GO-AgNPs) nano-structure was synthesized in this study for the first time, and its electrochemical performance was compared with GO-AgNPs. As a result of electrochemical studies, the rate constants of the GO-AgNPs and M-GO-AgNPs modified electrodes were found as ksanodic= 6.62 s-1 and ksanodic= 6.78 s-1, respectively. Finally, the M-GO-AgNPs nano-structure obtained by sonochemical technique, a green chemistry synthesis technique, has been found to be suitable for use as an electrochemical ...
A general method for the non-oxidative functionalization of single-crystal silicon(111) surfaces is described. The silicon surface is fully acetylenylated using two-step chlorination/alkylation chemistry. A benzoquinone-masked primary amine is attached to this surface via Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition (click chemistry). The benzoquinone is electrochemically reduced, resulting in quantitative cleavage of the molecule and exposing the amine terminus. Molecules presenting a carboxylic acid have been immobilized to the exposed amine sites. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), and contact angle goniometry were utilized to characterize and quantitate each step in the functionalization process. This work represents a strategy for providing a general platform that can incorporate organic and biological molecules on Si(111) with minimal oxidation of the silicon surface. ...
The study reports the synthesis of cobalt oxide (Co3O4) nanostructures and their application in enzyme free electrochemical sensing of glucose. The synthesized nanostructures were elaborately characterized via number of analytical techniques including scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). The as-synthesized nanostructures of Co3O4 were found to exhibited nanodisc like morphology with the size dimension in range of 300-500 nm. The obtained morphological features were evaluated for their electrochemical potential towards oxidation of glucose which enabled development of sensitive (27.33 mu A mM(-1) cm(-2)), and stable enzyme free glucose sensor. In addition, the developed sensor showed excellent linearity (r(2)=0.9995), wide detection range (0.5-5.0 mM), lower detection limit (0.8 mu M) and extreme selectivity towards glucose in the presence of common interferents like dopamine (DP), ...
Methyl-substituted piperidines, oxanes, 1,3-dioxanes, and cyclohexanones were studied by photoelectron spectroscopy (pes) to determine the mechanism by which alkyl groups stabilize radical cations. Hyperconjugation was found to be the dominant mechanism, while inductive effects and charge-induced polarization were indicated to be less effective. N-Arylazacycloalkanes were studied by pes to correlate solution basicities with ionization potentials (IPs). Conformational analysis of these compounds indicated that aryl-substituted aziridines are coplanar (conjugating) in all cases studied, while ortho substituent(s) may cause rotation and loss of conjugation between the lone pair and the phenyl ring as the amine ring size is increased. N-Phenylpiperidine was indicated to be non-coplanar, despite the lack of ortho substituents. Pes studies of phencyclidine and a number of its analogs demonstrate that the amine lone pair IP changes predictably, depending on the nature and location of the substituent. The
Abstract: Diamond film was deposited on the pure titanium substrate by CH4-H2 gas mixture using MPCVD method. In order to carboxylate the surface of the diamond film, it was chemically treated in H2SO4:HNO3 (9:1, case 1) stirred at room temperature or in H2SO4:HNO3 (3:1, case 2) stirred at reflux. The oxidized diamond film was successively treated with 0.1M NaOH for 2hours and 0.1M HCl at 363K for 2hours, and then washed by distilled water. The surface of diamond film was observed by scanning electron microscopy (SEM). The diamond film was characterized using Raman spectroscopy and X-ray diffraction (XRD). Carboxylated diamond film was evaluated by Fourier transform infrared spectrometer (FT-IR), Mini secondary ion mass spectrometer (Mini SIMS) and X-ray photoelectron spectroscopy (XPS). In the FT-IR spectrum, the peak at 1640cm -1 was assigned with C=O stretching vibration of carboxylic acid. In the Mini SIMS profile, the peak intensities of mass number 16 (-O-) and 17 (-OH) were increased ...
A study was conducted to control thermoresponsivity with supramolecular self-assembly of pseudo-block copolymer based on star-shaped poly(N-isopropylacrylamide) with a β-cyclodextrin core and guest-bearing PEG. The study used a star polymer, synthesized with a β-CD core as molecular recognition moiety and multiple PNIPAAm arms as actuation moieties. Nuclear magnetic resonance (NMR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were used to determine the degree of substitution (DS) of the purified macroinitiator. The study found that β-CD-core star polymer was obtained by synthesis of a β-CD-based macroinitiator. The study synthesized the macromolecular guests by coupling the molecular recognition moiety, adamantane with biocompatible hydrophilic poly(ehtylene glycol) (PEG ...
For the first time, the synthesis, characterization, and analytical application for hydrogen peroxide quantification of the hybrid materials of Co2TiO4 (CTO) and reduced graphene oxide (RGO) is reported, using in situ (CTO/RGO) and ex situ (CTO+RGO) preparations. This synthesis for obtaining nanostructured CTO is based on a one-step hydrothermal synthesis, with new precursors and low temperatures. The morphology, structure, and composition of the synthesized materials were examined using scanning electron microscopy, X-ray diffraction (XRD), neutron powder diffraction (NPD), and X-ray photoelectron spectroscopy (XPS). Rietveld refinements using neutron diffraction data were conducted to determine the cation distributions in CTO. Hybrid materials were also characterized by Brunauer–Emmett–Teller adsorption isotherms, Scanning Electron microscopy, and scanning electrochemical microscopy. From an analytical point of view, we evaluated the electrochemical reduction of hydrogen peroxide on glassy
This is a fully computer-controlled instrument from Vacuum Generators that combines two analytical instruments into a single workstation, viz., x-ray photoelectron spectroscopy (XPS) and secondary ion mass spectrometry (SIMS). The XPS subsystem can be run with a normal Al/Mg anode or a monochromatized Al anode for higher energy resolution. A small spot mode allows analysis down to 150 microns. The SIMS subsystem works with a quadrupole mass spectrometer with unit mass resolution up to m/e = 800 and single ion detection capability. A fast entry system permits rapid sample introduction and interchange. A high-pressure cell is also incorporated for simulation of processes occurring at pressures up to 30 atmospheres. A fast entry system permits rapid sample introduction and interchange. A high-pressure cell is also incorporated for simulation of processes occurring at pressures up to 30 atmospheres.. ...
Low-temperature atomic layer deposition (ALD) of TiO2, SiO2, and Al2O3 was applied to modify the surface and to tailor the diameter of nanochannels in etched ion-track polycarbonate membranes. The homogeneity, conformity, and composition of the coating inside the nanochannels are investigated for different channel diameters (18-55 nm) and film thicknesses (5-22 nm). Small angle x-ray scattering before and after ALD demonstrates conformal coating along the full channel length. X-ray photoelectron spectroscopy and energy dispersive x-ray spectroscopy provide evidence of nearly stoichiometric composition of the different coatings. By wet-chemical methods, the ALD-deposited film is released from the supporting polymer templates providing 30 μm long self-supporting nanotubes with walls as thin as 5 nm. Electrolytic ion-conductivity measurements provide proof-of-concept that combining ALD coating with ion-track nanotechnology offers promising perspectives for single-pore applications by controlled ...
for different oxidation states of the same element in X-ray photoelectron spectroscopy measurements, should the full width half maximum (FWHM) value be the same for all? Is this a parameter to fix in this case for the fitting ...
Although the content of Mg2+ in hard tissues is very low (typically 1.5wt%), its incorporation into synthetic hydroxyapatite (HAp) particles and its role in the minerals properties are still subject of intensive debate. A combined experimental-computational approach is used to answer many of the open questions. Mg2+-enriched HAp particles are prepared using different synthetic approaches and considering different concentrations of Mg2+ in the reaction medium. The composition, morphology and structure of the resulting particles are investigated using X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, scanning and transmission electron microscopies, FTIR, and wide-angle X-ray diffraction. After this scrutiny, the role of the Mg2+ in the first nucleation stages, before HAp formation, is investigated using atomistic molecular dynamics simulations. Saturated solutions are simulated with and without the presence of DNA, which has been recently used as a soft template in the ...
The aim of this project was to establish the arc discharge in water method as a valid method of producing metal oxide nanoparticles (NPs) with dielectric properties. A vertical arc discharge system was designed and fabricated and several diagnostic tools were attached to the system in order to monitor in situ the propagation of the plasma. Electrical measurements, high speed imaging, optical emission spectroscopy and electrode mass reduction measurements were employed to three different anode materials; aluminum and tantalum rods as well as a mixture of copper-tantalum compressed powder grains. The cathode of the DC arc was in all cases was a carbon rod. The product of the discharge was collected in powder form and examined by means of electron microscopy, x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS) and broadband dielectric spectroscopy (BDS). The experiments showed that, during discharge, the physical processes occurring between the electrodes, force the anode material to ...
Structurally well-defined C₄F₉, C₇F₁₅, C₁₀F₂₁ and C₁₃F₂₇ end-functionalized polystyrene (RF-PS) and polybutylmethacrylate (RF-PBMA) were prepared by Atom Transfer Polymerization using the RF-tagged initiators. Blends (1/1 wt/wt) of these polymers were studied by differential scanning calorimetry (DSC), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and optical transmittance (OT). The RF-PS/RF-PBMA blends having molecular weights of 20,000 and C₇F₁₅ or larger end groups, were optically transparent. The AFM micrographs show crater, necklace and other RF mediated morphologies typically at the submicron scale. TEMs of the PS and PBMA blends show the assembly of nm-sized lamellae and lamellar aggregates into domains with sizes in the micron or nanometer scales depending on MW and RF size. A semi-quantitative phase diagram the blends shows that lower MWs and longer RF groups improve phase compatibilities. ...
Structurally well-defined C₄F₉, C₇F₁₅, C₁₀F₂₁ and C₁₃F₂₇ end-functionalized polystyrene (RF-PS) and polybutylmethacrylate (RF-PBMA) were prepared by Atom Transfer Polymerization using the RF-tagged initiators. Blends (1/1 wt/wt) of these polymers were studied by differential scanning calorimetry (DSC), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and optical transmittance (OT). The RF-PS/RF-PBMA blends having molecular weights of 20,000 and C₇F₁₅ or larger end groups, were optically transparent. The AFM micrographs show crater, necklace and other RF mediated morphologies typically at the submicron scale. TEMs of the PS and PBMA blends show the assembly of nm-sized lamellae and lamellar aggregates into domains with sizes in the micron or nanometer scales depending on MW and RF size. A semi-quantitative phase diagram the blends shows that lower MWs and longer RF groups improve phase compatibilities. ...
Microphase separation behavior on the surfaces of poly(dimethylsiloxane)-block-poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate) (PDMS-b-PHFBMA) diblock copolymer coatings was investigated. The PDMS-b-PHFBMA diblock copolymers were successfully synthesized via atom transfer radical polymerization (ATRP). The chemical structure of the copolymers was characterized by nuclear magnetic resonance and Fourier transform infrared spectroscopy. Surface composition was studied by X-ray photoelectron spectroscopy. Copolymer microstructure was investigated by atomic force microscopy. The microstructure observations show that well-organized phase-separated surfaces consist of hydrophobic domain from PDMS segments and more hydrophobic domain from PHFBMA segments in the copolymers. The increase in the PHFBMA content can strengthen the microphase separation behavior in the PDMS-b-PHFBMA diblock copolymers. And the increase in the annealing temperature can also strengthen the microphase separation behavior in ...
TY - JOUR. T1 - Improved dielectric properties of BeO thin films grown by plasma enhanced atomic layer deposition. AU - Jang, Yoonseo. AU - Lee, Seung Min. AU - Jung, Do Hwan. AU - Yum, Jung Hwan. AU - Larsen, Eric S.. AU - Bielawski, Christopher W.. AU - Oh, Jungwoo. PY - 2020/1. Y1 - 2020/1. N2 - Beryllium oxide (BeO) thin films were grown on a p-type Si substrate by plasma enhanced atomic layer deposition (PEALD) using diethylberyllium as a precursor and O2 plasma. The PEALD BeO exhibited self-saturation and linear growth rates. The dielectric properties of PEALD were compared with those of thermal atomic layer deposition (ThALD). X-ray photoelectron spectroscopy was performed to determine the bandgap energy of PEALD BeO (8.0 eV) and ThALD BeO (7.9 eV). Capacitance-voltage curves revealed that PEALD BeO had low hysteresis and frequency dispersion compared to ThALD BeO. In addition, PEALD showed a dielectric constant of 7.15 (at 1 MHz) and low leakage current (7.25×10-9 A/cm2 at −1 MV/cm). ...
There is often ambiguity concerning the antiwear mechanisms of soluble lubricant additives used in bearings. For example, the common spacecraft lubricant additive lead naphthenate is thought to be effective only as long as a measurable concentration is present in the oil lubricant throughout the mechanism lifetime. Recent mechanism tests with several days of operation indicated that a hydrocarbon lubricant was depleted of lead naphthenate, even during successful operation. To elucidate this apparent contradiction, we conducted tests on 440C stainless-steel thrust bearings lubricated with Apiezon C hydrocarbon oil that was formulated with 5 wt lead naphthenate. The remaining oil in the bearings was analyzed using Fourier Transform Infrared Spectroscopy FTIR after several tests with varying durations up to 336 h 2 wk. FTIR showed that lead naphthenate chemically changes within 24 h and begins to disappear in 336 h. X-ray photoelectron spectroscopy XPS was used to determine the chemical state of the
Dr Cobleys research concerns the fabrication, processing, characterisation and modelling of low-dimensional materials, including metal oxide nanowires and nanosheets, and graphene. He also designs, characterises and models novel electronic devices, particularly those that make use of low-dimensional physical properties, or suffer from confinement or leakage issues due to small sizes.. Working within the Centre for Nanohealth at Swansea we are able to fabricate a wide range of nanomaterials. Our characterisation equipment includes ultra high vacuum four point probe (with in-situ scanning electron microscopy), scanning auger microscopy, and x-ray photoelectron spectroscopy.. Dr Cobley has supervised many PhD, masters, and other research students on these areas - some are listed below. Interested potential students are welcome to email for a current list of vacancies.. He is the postgraduate admissions tutor for Nanotechnology. Please email him with any enquiries about research masters or PhD ...
A carbon-supported (1:1) Pt-Ru (Pt-Ru/C) alloy catalyst has been prepared in-house by the sulfito-complex route, and has been tailored to achieve enhanced activity towards methanol electro-oxidation by annealing it at varying temperatures in air. The catalyst samples annealed between 250 and 300 degrees C in air for 30 min exhibit superior catalytic activity towards methanol electro-oxidation in a solid-polymer-electrolyte direct methanol fuel cell (SPE-DMFCs) operating at 90 degrees C. Both the as-prepared and annealed Pt-Ru/C catalysts have been characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS), and cyclic voltammetry. It is conjectured that while annealing the Pt-Ru/C catalysts, both Pt-Pt and Pt-Ru bonds increase whereas the Pt-O bond shrinks. This is accompanied with a positive variation in Ru/Pt metal ratio suggesting the diffusion of Ru metal from the bulk ...
This project intends to provide a financial background for developing the community of Surface Science in Romania. Thematics from physics and chemistry of surfaces will be tackled together with applications of surface science in biology and in technology; also new standards will be proposed for consistent data interpretation. The Project clusterizes the most important Romanian teams with preoccupations in surface science, namely all X-ray photoelectron spectroscopy teams with most of the community of thin film deposition, cluster and nanoparticle physics, surface reactivity, surface chemistry and photochemistry, multilayer physics and applications, magnetic fluids, functionalization of surfaces, cell attachment, studies of cellular membrane. The research teams belong to highly prominent Universities and Research Institutes from practically all geographical areas of the country. The Consortium disposes of infrastructure exceeding 10 million euros, of more than one hundreed highly qualified ...
The high-resolution vacuum ultraviolet photoabsorption spectrum of isobutyl acetate, C6H12O2, is presented here and was measured over the energy range 4.3-10.8 eV (290-115 nm). Valence and Rydberg transitions with their associated vibronic series have been observed in the photoabsorption spectrum and are assigned in accordance with new ab initio calculations of the vertical excitation energies and oscillator strengths. The measured photoabsorption cross sections have been used to calculate the photolysis lifetime of this ester in the Earths upper atmosphere (20-50 km). Calculations have also been carried out to determine the ionization energies and fine structure of the lowest ionic state of isobutyl acetate and are compared with a photoelectron spectrum (from 9.5 to 16.7 eV), recorded for the first time. Vibrational structure is observed in the first photoelectron band of this molecule.. ...
Himpsel, Franz J.; Neville Smith (1985). "Photoelectron Spectroscopy". Physics Today. 38 (12): 60. Bibcode:1985PhT....38l..60H ... helped to advance the field of ultrafast THz spectroscopy. He has subsequently used ultrafast lasers to study problems in ...
"Applications of photoelectron spectroscopy. 41. Photoelectron spectra of phosphabenzene, arsabenzene, and stibabenzene". ...
X-ray photoelectron spectroscopy (XPS) and X-ray diffractometry (XRD) are widely used to gain insights into film composition ... Andrade JD (1985). "X-ray Photoelectron Spectroscopy (XPS)". Surface and Interfacial Aspects of Biomedical Polymers. Springer ... doi:10.1007/978-1-4684-8610-0_5. ISBN 978-1-4684-8612-4. Jenkins R (July 1974). "X-ray spectroscopy. Leonid Azaroff, McGraw- ... Fourier transform infrared spectroscopy (FTIR) is an important tool to understand the new functional group added or removed ...
ISBN 978-981-02-0430-3. Joseph Berkowitz (1979). Photoabsorption, photoionization, and photoelectron spectroscopy. Academic ... More precisely, The system will have multiple peaks in its photoelectron spectrum which are separated by the photon energies, ... Resonance-enhanced multiphoton ionization (REMPI) is a technique applied to the spectroscopy of atoms and small molecules in ... ISBN 978-0-12-091650-4. V. S. Letokhov (1987). Laser photoionization spectroscopy. Academic Press. ISBN 978-0-12-444320-4.. ...
Hüfner, S. (2003). Photoelectron Spectroscopy: Principles and Applications. Springer. ISBN 3-540-41802-4. Damascelli, Andrea; ... Photoelectron spectroscopy measurements are usually performed in a high-vacuum environment, because the electrons would be ... "Solid-State Photoelectron Spectroscopy with Synchrotron Radiation". Science. 206 (4415): 151-156. Bibcode:1979Sci...206..151W. ... When the photoelectron is emitted into a solid rather than into a vacuum, the term internal photoemission is often used, and ...
Huckel theory and photoelectron spectroscopy. von Nagy-Felsobuki, Ellak I. J. Chem. Educ. 1989, 66, 821. Levine, Ira N. (2000 ... theorem correlate with photoelectron spectroscopy. The Hückel delocalization energy correlates with the experimental heat of ... correlates directly with the respective molecular electronic transitions observed with UV/VIS spectroscopy. For linear polyenes ...
Fano can be observed with photoelectron spectroscopy and Raman spectroscopy. The phenomenon can be also observed at visible ... "Resonant photoelectron spectroscopy on NiO". Physical Review B. 53 (15): 10372-10376. doi:10.1103/PhysRevB.53.10372. ISSN 0163- ...
... ultraviolet photoelectron spectroscopy and infrared spectroscopy in a low temperature matrix. The open ring isomer, ... "Theory and application of photoelectron spectroscopy. 100. Variable-temperature photoelectron spectral study of 1,3-dithiol-2- ... Unsubstituted 1,2-dithiete has been generated in thermolytic reactions and was characterized by microwave spectroscopy, ...
Raman spectroscopy (FT-Raman) Ultraviolet-visible spectroscopy (UV-Vis) X-ray photoelectron spectroscopy (XPS, ESCA) Wavelength ... Rhenate Mercurous Mercuric ion Mercurate Thallate Thallic ion X-ray photoelectron spectroscopy Photoemission spectroscopy John ... Surface Analysis by Auger and X-ray Photoelectron Spectroscopy. IM Publications. ISBN 978-1-901019-04-9. Martin P. Seah; David ... Practical Surface Analysis by Auger and X-ray Photoelectron Spectroscopy (2nd ed.). Wiley & Sons. ISBN 978-0-471-92082-3. "ISO ...
Clauberg, H.; Minsek, D. W.; Chen, P. (1992). "Mass and photoelectron spectroscopy of C3H2. .DELTA.Hf of singlet carbenes ... "Photoionization mass and photoelectron spectroscopy of radicals, carbenes, and biradicals". Acc. Chem. Res. 25 (9): 385. doi: ...
This has been confirmed by photoelectron spectroscopy. Ab-initio-MO calculations have shown that, in addition to the σ binding ... The individual molecules were identified or assigned by X-ray photoelectron spectroscopy (XPS), high-resolution electron energy ... loss spectroscopy (HREELS) and IR spectroscopy. On the basis of these experimental findings, the reaction mechanism is believed ...
Some forms of spectroscopy involve analysis of electron energy rather than photon energy. X-ray photoelectron spectroscopy is ... The capability of spectroscopy to determine chemical composition drove its advancement and continues to be one of its primary ... Ultraviolet-visible spectroscopy is an example. These spectrometers utilize the phenomenon of optical dispersion. The light ... and Gamma-Ray Spectroscopy, North-Holland Publishing Co. Amsterdam (1966). ...
"Spin Orbit Splitting". X-ray Photoelectron Spectroscopy (XPS) Reference Pages. University of Western Ontario. 2012. Retrieved ...
... interfacial mechanisms studied by hard and soft X-ray photoelectron spectroscopy; Chemistry of Materials, 1107-1115 (24), 2012 ... Electrochemically lithiated graphite characterised by photoelectron spectroscopy; Journal of Power Sources, 522-527 (119) 2003 ... Her research has particularly considered new anode materials, using photoemission spectroscopy to identify the impact of ...
"Pitfalls in measuring work function using photoelectron spectroscopy". Applied Surface Science. 256 (8): 2602. Bibcode:2010ApSS ... G.L. Kulcinski, "Thermionic Energy Conversion" [1] "Photoelectron Emission". www.virginia.edu. Retrieved 11 April 2018. ...
... photo-electron spectroscopy, and exact experimental electron density mapping by X-ray and neutron diffraction techniques. The ... "Photoelectron Spectroscopy of a Carbene/Silylene/Germylene Series". J. Am. Chem. Soc. 116 (15): 6641-6649. doi:10.1021/ ...
... and nitrogen-containing functional groups and analyzed by infrared spectroscopy and X-ray photoelectron spectroscopy. However, ... "Analysis of heat-treated graphite oxide by X-ray photoelectron spectroscopy". Journal of Materials Science. 48 (23): 8171-8198 ... "Nitrogen-containing graphene analyzed by X-ray photoelectron spectroscopy". Carbon. 70: 59-74. doi:10.1016/j.carbon.2013.12.061 ...
Petek has developed coherent photoelectron spectroscopy and microscopy as methods for studying the dephasing and spatial ... Reutzel, Marcel; Li, Andi; Petek, Hrvoje (8 March 2019). "Coherent Two-Dimensional Multiphoton Photoelectron Spectroscopy of ... He is developing methods for multidimensional multiphoton-photoemission spectroscopy. Together with Taketoshi Minato, Yousoo ... Imaging Light with Photoelectrons on the Nano-Femto Scale". J. Phys. Chem. Lett. 8 (18): 4446-4455. doi:10.1021/acs.jpclett. ...
... and nitrogen-containing functional groups and analyzed by infrared spectroscopy and X-ray photoelectron spectroscopy. However, ... "Analysis of heat-treated graphite oxide by X-ray photoelectron spectroscopy". Journal of Materials Science. 48 (23): 8171-8198 ... "Nitrogen-containing graphene analyzed by X-ray photoelectron spectroscopy". Carbon. 70: 59-74. doi:10.1016/j.carbon.2013.12.061 ... The two versions behave alike and are indistinguishable via optical spectroscopy. An electron traveling from a positive-mass ...
Surface Analysis by Auger and X-ray Photoelectron Spectroscopy. Chichester: IM Publications. ISBN 1-901019-04-7. Akinari Yokoya ... Auger electron spectroscopy involves the emission of Auger electrons by bombarding a sample with either X-rays or energetic ...
"Time-Resolved Femtosecond Photoelectron Spectroscopy by Field-Induced Surface Hopping". The Journal of Physical Chemistry A. ...
Excited-state ionization energies can be measured by photoelectron spectroscopy. For H2O, the near-Hartree-Fock orbital ... Journal of Electron Spectroscopy and Related Phenomena. 123 (2-3): 345-363. doi:10.1016/S0368-2048(02)00032-4. See, for example ...
ISBN 978-0-08-037941-8. Saha, Naresh (1992). "Titanium nitride oxidation chemistry: An x-ray photoelectron spectroscopy study ... 2018). "Complete electrodynamics of a BCS superconductor with μeV energy scales: Microwave spectroscopy on titanium at mK ...
Briggs, D.; Seah, M. P. (1995). Practical surface analysis Auger and X-ray Photoelectron Spectroscopy (2. ed., Reprint. ed.). ... doi:10.1016/0021-9517(79)90011-3. Ilyin, A. M.; Golovanov, V. N. (1996). "Auger spectroscopy study of the stress enhanced ... provides excellent agreement with experimental data obtained by Auger electron spectroscopy and other techniques. Other models ...
X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) or in imaging applications such as photoemission ... doi:10.1016/0368-2048(85)80021-9. Practical surface analysis : by auger and x-ray photoelectron spectroscopy. Briggs, D. (David ... This mode exploits the relation between the kinetic energy of a photoelectron and its position inside the detector. If the ... The electrostatic lenses in front of the analyzer have two main purposes: they collect and focus the incoming photoelectrons ...
Photoelectron spectroscopy revealed a relatively simple spectrum, suggesting a symmetric cluster. Neutral B36 is the smallest ... focusing on the fundamental behaviors of nanoclusters using photoelectron spectroscopy and computational techniques. With his ... group has also developed ion-trap techniques to create ultracold anions that allow high resolution photoelectron spectroscopy ... Plyler Prize for Molecular Spectroscopy American Chemical Society American Physical Society Materials Research Society American ...
"Analysis of heat-treated graphite oxide by X-ray photoelectron spectroscopy". Journal of Materials Science. 48 (23): 8171-8198 ... Raman spectroscopy proved that SLG had grown on nickel substrate. The SLG Raman spectrum featured no D and D′ band, indicating ... Raman spectroscopy can provide information about the number of layers on graphene stacks, the atomic structure of graphene ... Since nickel is not Raman active, direct Raman spectroscopy of graphene layers on top of the nickel is achievable. Another ...
Mukhopadhyay, Sharmila M. (1990). "Surface studies of TiO2- SiO2 glasses by X-ray photoelectron spectroscopy". Journal of Non- ...
Gas-phase production and photoelectron spectroscopy of the smallest fullerene, C20. Nature 407, 60-63 (7 September 2000) , doi: ...
An X-ray photoelectron spectroscopy study: III. Fluorination of different carbon blacks with gaseous fluorine at temperatures ... A study by FT-IR spectroscopy". Carbon. 37 (10): 1517-1528. doi:10.1016/S0008-6223(99)00025-1. Machnikowski J.; Kaczmarska H.; ... Study by FT-IR". Spectroscopy Letters. 26 (6): 1117-1137. Bibcode:1993SpecL..26.1117A. doi:10.1080/00387019308011598. Gomez- ...
An X-ray photoelectron spectroscopy study: III. Fluorination of different carbon blacks with gaseous fluorine at temperatures ... Study by FT-IR". Spectroscopy Letters. 26 (6): 1117-1137. Bibcode:1993SpecL..26.1117A. doi:10.1080/00387019308011598.. ... A study by FT-IR spectroscopy". Carbon. 37 (10): 1517-1528. doi:10.1016/S0008-6223(99)00025-1.. ...
The intermediate has been produced by reaction of oxygen radical anions with acetone and studied by photoelectron spectroscopy ...
photoelectron. *Energy-dispersive X-ray spectroscopy. *Photoelectron. *Atomic. *Emission. *X-ray photoelectron spectroscopy ... "FastTrack™ UV/VIS Spectroscopy" (PDF). www.mt.com. Mettler-Toledo AG, Analytical. 2016. Retrieved Dec 23, 2018.. ... Main article: Ultraviolet-visible spectroscopy. Most spectrophotometers are used in the UV and visible regions of the spectrum ... Spectrophotometry is a branch of electromagnetic spectroscopy concerned with the quantitative measurement of the reflection or ...
X-ray photoelectron spectroscopy xenon Xenotime YBCO Ytterbium Yttria Yttrium Yuan T. Lee Zeolite Zinc Zinnwaldite Zircon ... Ulexite UN number Uralite Uraninite Uranium Urea Uric acid UV/VIS spectroscopy Valence Van der Waals radius Van der Waals force ... radioisotope Radium Radon Radon fluoride Raman spectroscopy Raoult's law Redox Reduction Reflux Reversible reaction Rhazes ... ice Idocrase Illite Ilmenite Ilya Prigogine Indium infrared spectroscopy Inorganic chemistry Intermolecular force International ...
X-ray photoelectron spectroscopy suggests iron has an oxidation state of approximately 3.2. ... Chemical reactivity of iron studied by XANES spectroscopy". Biophysical Journal. 48 (6): 997-1001. Bibcode:1985BpJ....48..997P ... Perrey, S. P. (2008). "Non-invasive NIR spectroscopy of human brain function during exercise". Methods. 45 (4): 289-99. doi: ... Van Beekvelt MC, Colier WN, Wevers RA, Van Engelen BG (2001). "Performance of near-infrared spectroscopy in measuring local O2 ...
The number of oxygen vacancies is frequently measured by using X-ray photoelectron spectroscopy to compare the ratios of Ce3+. ...
Video spectroscopy. *Vibrational circular dichroism. *Vibrational spectroscopy of linear molecules. *X-ray photoelectron ... X-ray spectroscopy. Works cited[edit]. *Gilmore G, Hemingway J. Practical Gamma-Ray Spectrometry. John Wiley & Sons, Chichester ... Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, in such as the nuclear industry, ... Gamma spectroscopy detectors are passive materials that wait for a gamma interaction to occur in the detector volume. The most ...
Gilles, Mary K.; Polak, Mark L.; Lineberger, W. C. (1992). "Photoelectron spectroscopy of the halogen oxide anions FO−, ClO−, ...
30-200 nm: Photoionization, ultraviolet photoelectron spectroscopy, standard integrated circuit manufacture by photolithography ... UV/VIS spectroscopy is widely used as a technique in chemistry to analyze chemical structure, the most notable one being ... These are often the emitting sources in UV spectroscopy equipment for chemical analysis. ...
"The Nature of X-Ray Photoelectron Spectra". CasaXPS. Casa Software Ltd. 2005. Retrieved 10 March 2019.. ... "Preparation, Structure and Vibrational Spectroscopy of Tetraperoxo Complexes of CrV+, VV+, NbV+ and TaV+". PhD thesis, ...
Feodor Ivanovich Vilesov, Volodymyr Nemoshkalenko for the development of the method of photoelectron spectroscopy and its ...
Photoelectron Spectroscopy and Density Functional Calculations". Journal of the American Chemical Society. 130 (15): 5167. doi: ...
Spectroscopy and reactivity[edit]. From spectra with rotational resolution, moments of inertia and hence bond lengths and ... For the parent benzene cation one has to rely on photoelectron spectra with comparatively lower resolution because this species ... Examples for these phenomena will be covered in Section #Spectroscopy and Reactivity. ... and it is related to a variety of applications in spectroscopy, stereochemistry and crystal chemistry, molecular and solid- ...
X-ray Photoelectron Spectroscopy XPS 0.1-1 atomic %[7] 1 nm[7] 10 µm[7] Depth Profile ... by G.; Vo-Dinh, T. (2002). Handbook of spectroscopy. Weinheim: Wiley-VCH. ISBN 9783527297825. .. CS1 maint: extra text: authors ... Doyle, B.L.; Peercy, P.S.; Gray, T.J.; Cocke, C.L.; Justiniano, E. (1983). "Surface Spectroscopy Using High Energy Heavy Ions ... Morello, Giuliana (1995). "Hydrogen content of amorphous PECVD Si Nx:H films by infrared spectroscopy and hydrogen forward ...
Edwards, H. G. M.; Chalmers, G. M (2005). Raman spectroscopy in archaeology and art history. Royal Society of Chemistry. pp. ... Fujimoto, A.; Yamada, Y.; Koinuma, M.; Sato, S. (2016). "Origins of sp3C peaks in C1s X-ray Photoelectron Spectra of Carbon ... Laboratories use techniques such as spectroscopy, microscopy and luminescence under shortwave ultraviolet light to determine a ... Techniques such as Raman spectroscopy should easily identify such a treatment.[131] ...
X-ray photoelectron spectroscopy, and scanning electron microscopy. From these methods, the authors found that: the object's ...
Photoelectron Spectroscopy and Density Functional Calculations". Journal of the American Chemical Society 130 (15): 5167. doi: ...
Video spectroscopy. *Vibrational circular dichroism. *Vibrational spectroscopy of linear molecules. *X-ray photoelectron ... Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a ... Other types of two-dimensional NMR include J-spectroscopy, exchange spectroscopy (EXSY), Nuclear Overhauser effect spectroscopy ... Biomolecular NMR spectroscopy[edit]. Proteins[edit]. Main article: Nuclear magnetic resonance spectroscopy of proteins ...
... later ultraviolet photoelectron spectroscopy (UPS) and scanning tunneling microscope (STM) yielding ground breaking results. He ... using photoelectron microscopy, was able to image for the first time, the oscillating changes in surface structure and coverage ...
30-200 nm: Photoionization, ultraviolet photoelectron spectroscopy, standard integrated circuit manufacture by photolithography ... Journal of Electron Spectroscopy and Related Phenomena. 80: 313-316. doi:10.1016/0368-2048(96)02983-0. Archived from the ... UV/Vis spectroscopy is widely used as a technique in chemistry to analyze chemical structure, the most notable one being ... These are often the emitting sources in UV spectroscopy equipment for chemical analysis. ...
The short pulse induced molecular fragmentation may be used as an ion source for high performance mass spectroscopy. The ... Morishita, Toru; Lin, C. D. (2013). "Photoelectron spectra and high Rydberg states of lithium generated by intense lasers in ... Todd, J. F. J. (1991). "Recommendations for Nomenclature and Symbolism for Mass Spectroscopy (including an appendix of terms ... "Ultra-fast laser pulses provide an ion source for highly selective mass spectroscopy". Applied Physics B. 91 (3-4): 579. ...
Video spectroscopy. *Vibrational circular dichroism. *Vibrational spectroscopy of linear molecules. *X-ray photoelectron ... The goal of any absorption spectroscopy (FTIR, ultraviolet-visible ("UV-Vis") spectroscopy, etc.) is to measure how well a ... Fourier-transform infrared spectroscopy (FTIR)[1] is a technique used to obtain an infrared spectrum of absorption or emission ... Nanoscale and spectroscopy below the diffraction limit[edit]. The spatial resolution of FTIR can be further improved below the ...
Video spectroscopy. *Vibrational circular dichroism. *Vibrational spectroscopy of linear molecules. *X-ray photoelectron ... Inverse Raman spectroscopy.. *Tip-enhanced Raman spectroscopy (TERS) - Uses a metallic (usually silver-/gold-coated AFM or STM ... Wikimedia Commons has media related to Raman spectroscopy.. *DoITPoMS Teaching and Learning Package - Raman Spectroscopy - an ... Surface-enhanced resonance Raman spectroscopy (SERRS) - A combination of SERS and resonance Raman spectroscopy that uses ...
Edwards, H. G. M.; Chalmers, G. M (2005). Raman spectroscopy in archaeology and art history. Royal Society of Chemistry. pp. ... "Origins of sp3C peaks in C1s X-ray Photoelectron Spectra of Carbon Materials". Analytical Chemistry. 88 (12): 6110-4. doi ... Laboratories use techniques such as spectroscopy, microscopy and luminescence under shortwave ultraviolet light to determine a ... Techniques such as Raman spectroscopy should easily identify such a treatment.[147] ...
... insight into the contributing electronic structure of molecules include cyclic voltammetry and X-ray photoelectron spectroscopy ... Techniques such as absorption spectroscopy and the vibrational spectroscopies, infrared and Raman, provide, respectively, ... The methods by which one can elucidate the structure of a molecule include spectroscopies such as nuclear magnetic resonance ( ...
X-ray photoelectron spectroscopy, and scanning electron microscopy. From these methods, the authors found the following: the ...
These include X-ray photoelectron spectroscopy, Auger electron spectroscopy, low-energy electron diffraction, electron energy ... surface enhanced Raman Spectroscopy and X-ray Photoelectron Spectroscopy (XPS). ... X-ray photoelectron spectroscopy (XPS) is a standard tool for measuring the chemical states of surface species and for ... "Profiling the Interface Electron Gas of LaAlO3 / SrTiO3 Heterostructures with Hard X-Ray Photoelectron Spectroscopy", Phys. Rev ...
It is possible to observe which elements do partake, e.g., by looking at the core levels in an X-ray photoelectron spectroscopy ... Tin Oxide Plasma Frequency Dependence on Sheet Resistance and Surface Adlayers Determined by Reflectance FTIR Spectroscopy". ...
... The electronic states of adsorption of phenol on TiO2 (110) is investigated by Ultraviolet ... Photoelectron Spectroscopy (UPS) as a well-defined model for environmentally persistent free radicals. The radicals, airborne ... The figure below shows the photoelectron spectra of both clean and 100 L phenol exposed TiO2 (110) surface. Upon phenol ...
Turner referred to the method as "molecular photoelectron spectroscopy", now usually "Ultraviolet photoelectron spectroscopy" ... spectroscopy ARPES Photoelectron photoion coincidence spectroscopy PEPICO Time-resolved two-photon photoelectron spectroscopy ... Ultraviolet photoelectron spectroscopy (UPS) refers to the measurement of kinetic energy spectra of photoelectrons emitted by ... About 1956 Kai Siegbahn developed X-ray photoelectron spectroscopy (XPS) for surface chemical analysis. This method uses x-ray ...
Ultraviolet photoelectron spectroscopy PES, Photoemission spectroscopy ZEKE, Zero electron kinetic energy spectroscopy AES, ... Auger electron spectroscopy EDS, Energy-dispersive X-ray spectroscopy, (EDX or EDXRF) PEEM, Photoelectron emission microscopy ... X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique based on the photoelectric ... If reference is taken with respect to the Fermi level (as it is typically done in photoelectron spectroscopy) , E b v , {\ ...
The X-ray photoelectron spectroscopy (XPS) platform is an open infrastructure at UmU enabling users both within UmU and outside ... XPS Platform provides surface analysis by X-Ray Photoelectron Spectroscopy (XPS) technique. Full range of conventional XPS ... XPS, also known as Electron Spectroscopy for Chemical Analysis (ESCA), is now one of the most widely used tools in countless ...
Photoelectron Photoion Coincidence Spectroscopy. Sketch of the molecular beam formation and detection schemes employed in the ... In situ flame chemistry tracing by imaging photoelectron photoion coincidence spectroscopy. Review of Scientific Instruments, ... A pioneering experiment for the study of reaction networks in flames by using Photoelectron Photoion Coincidence (iPEPICO) ... spectroscopy was realized at the Synchrotron Light Source (SLS) from the Paul Scherer Institute (PSI). This new analytical tool ...
Photoelectron Spectroscopy of Heteroeycles Fig. 3. He I photoelectron spectra of phenyl substituted ethenes: styrene (1), 1,1- ... Photoelectron spectroscopy studies / Dihydrides We have used synchrotron radiation for photoelectron ... Notizen 247 Photoelectron Spectroscopy of Heterocycles. Polypyridines I. Novak and L. Klasinc* "Rud jer Boskov ic " Institute ... Comparison of Photoelectron-Spectroscopy Results to Ab-Initio and Density Functional Calculations: The Ethylbenzene Cation ...
IMS »X-ray »atmospheric pressure »electromagnetic waves »photoelectron spectroscopy »spectroscopy »wavelength »waves ... Further reports about: , IMS , X-ray , atmospheric pressure , electromagnetic waves , photoelectron spectroscopy , spectroscopy ... 3 Photoelectron spectroscopy. Method to observe conditions of a material by measuring the energy of photoelectrons emitted ... X-ray photoelectron spectroscopy under real ambient pressure conditions. 28.06.2017. Researchers at Institute for Molecular ...
We discuss the first two generations of Ambient Pressure PhotoEmission Spectroscopy (APPES) instruments developed at ... We describe the development and applications of novel instrumentation for photoemission spectroscopy of solid or liquid ... Ogletree, D. Frank; Bluhm, Hendrik; Hebenstreit, Eleonore B. & Salmeron, Miquel. Photoelectron Spectroscopy under Ambient ... We describe the development and applications of novel instrumentation for photoemission spectroscopy of solid or liquid ...
3 photoelectron spectroscopy spectrum of atomic Cd, Journal of Electron Spectroscopy and Related Phenomena, 2008, 168, 1-3, 11 ... Auger-photoelectron coincidence spectroscopy of SiO2, Journal of Electron Spectroscopy and Related Phenomena, 2007, 161, 1-3, ... Many-body effect in the coincidence L3 and M3 photoelectron spectroscopy spectra of Cu metal, Journal of Electron Spectroscopy ... Many-body calculation of the coincidence L3 photoelectron spectroscopy main line of Ni metal, Journal of Electron Spectroscopy ...
X-ray photoelectron spectroscopy (XPS) provides chemical information and can be exploited with either soft (SXPS) or hard X- ... XPS: X-ray Photoelectron Spectroscopy HAXPES: Hard X-ray Photoelectron Spectroscopy NEXAFS: Near Edge X-ray Absorption Fine ... X-ray photoelectron spectroscopy (XPS) provides chemical information and can be exploited with either soft (SXPS) or hard X- ... for high-resolution studies of atomic and electronic structures of surfaces and interfaces using photoelectron spectroscopy, ...
Strategies and Opportunities for Measuring Carbon Nanotubes within a Polymer Composites by X-ray Photoelectron Spectroscopy. ... Strategies and Opportunities for Measuring Carbon Nanotubes within a Polymer Composites by X-ray Photoelectron Spectroscopy, ... some challenges and strategies for the characterization of CNT-polymer composite systems by X-ray Photoelectron Spectroscopy ( ...
X-RAY PHOTOELECTRON SPECTROSCOPY (XPS). No. Details. 1. Location:. Advance X-Ray Photoelectron Spectroscopy Laboratory. Room no ... X-Ray Photoelectron Spectroscopy is a quantitative analysis tool that can provide the elemental composition (excluding hydrogen ... Mass Spectrometry & Molecular Spectroscopy Lab *FLUORESCENCE , TCSPC Fluorescence Spectrophotometer. *CD , Circular Dichroism ... The binding energy of a photoelectron reflects the bonding environment it was emitted from. Accurate measurement of peak ...
Determination of the electronic structure of transparent conducting oxides with photoelectron spectroscopy. Die Veranstaltung ... "Determination of the electronic structure of transparent conducting oxides with photoelectron spectroscopy". ... "Determination of the electronic structure of transparent conducting oxides with photoelectron spectroscopy" ... Angle-resolved photoemission spectroscopy (ARPES) is one of the most powerful techniques in modern experimental condensed ...
Photoelectron spectroscopy : an introduction to ultraviolet photoelectron spectroscopy in the gas phase ... High-resolution hard X-ray photoelectron spectroscopy: Application of valence band and core-level spectroscopy to materials ... NIST data resources for surface analysis by X-ray photoelectron spectroscopy and Auger electron spectroscopy ... Photoelectron spectroscopy of reactive intermediates using synchrotron radiation Barr, J. D.; Beeching, L.; De Fanis, A. 2000- ...
... dc.creator. Baudhuin, Melissa A.. en_US. ... A STUDY OF NbCr AND NbCr$^{-}$ BY ANION PHOTOELECTRON SPECTROSCOPY. en_US. ... OSU International Symposium on Molecular Spectroscopy * Abstracts of OSU International Symposium on Molecular Spectroscopy 2010 ... OSU International Symposium on Molecular Spectroscopy * Abstracts of OSU International Symposium on Molecular Spectroscopy 2010 ...
X-ray photoelectron spectroscopy (XPS). Consequently, this Thesis describes the XPS of ionic liquid-based metal catalytic ...
Photoelectron Spectroscopy of Organic Aromatic Anions. Title. Photoelectron Spectroscopy of Organic Aromatic Anions. ... Photoelectron spectroscopy of the isomers of methylphenoxide reveals that these molecules display minimal vibrational ... This dissertation reports and interprets the results of experiments in which photoelectron spectroscopy was performed on a ... The photoelectron spectra of p-methylphenoxide reveal a photon energy dependence arising from electron autodetachment. The slow ...
OSU International Symposium on Molecular Spectroscopy * Abstracts of OSU International Symposium on Molecular Spectroscopy 2010 ... OSU International Symposium on Molecular Spectroscopy * Abstracts of OSU International Symposium on Molecular Spectroscopy 2010 ... Vibrationally-resolved photoelectron spectra of molybdenum vanadium oxo cluster anions with 2 to 5 oxygen atoms and measured ...
XPS - X-ray Photoelectron Spectroscopy i samarbejde med DTU DANCHIP. Ved hjælp af XPS kan man analysere elementerne i de ... X-ray Photoelectron Spectroscopy ".. Udfyld formularen og send en e-mail med link til denne side samt en eventuel kommentar til ... kan blandt andet tilbyde kemisk karakterisering af materialer og overflader med Glow Discharge Optical Emission Spectroscopy ( ...
X-ray Photoelectron Spectroscopy: Sample Preparation Demonstration2:26. X-ray Photoelectron Spectroscopy: Measurement ... X-ray photoelectron spectroscopy, and optical spectroscopy. You will learn the basic function of the equipment and how samples ... X-ray Photoelectron Spectroscopy: Basic Function. To view this video please enable JavaScript, and consider upgrading to a web ...
Negative ion photoelectron spectroscopy of solvated electron cluster anions, (H2O) n − and (NH3) n − ...
... Maibach, Julia; Källquist, Ida; Andersson ... Operando ambient pressure photoelectron spectroscopy in realistic battery environments is a key development towards probing the ... Operando ambient pressure photoelectron spectroscopy in realistic battery environments is a key development towards probing the ... For the first time, we show ambient pressure photoelectron spectroscopy data of propylene carbonate in the liquid phase by ...
Anion photoelectron spectroscopy of deprotonated indole and indoline. Title. Anion photoelectron spectroscopy of deprotonated ...
... photoelectron spectroscopy, pulsed field ionization photoelectron spectroscopy and one-color resonance-enhanced multiphoton ... While the photoelectron kinetic energy distribution does not exhibit a clear signature of internal conversion, the ... ionization spectroscopy. Finally, ultrafast S2(ππ*)-S1(ππ*) internal conversion in benzene and toluene are compared with ... photoelectron angular anisotropy unambiguously reveals the sudden change of electron configuration upon internal conversion. An ...
X-ray photoelectron spectroscopy was used for elemental analysis and to determine the efficacy of various surface cleaning ... X-ray photoelectron spectroscopy was used for elemental analysis and to determine the efficacy of various surface cleaning ... X-ray photoelectron spectroscopy was used for elemental analysis and to determine the efficacy of various surface cleaning ... X-ray photoelectron spectroscopy revealed that this surface layer is mainly composed of silicon oxide and silicon nitride. ...
The potential merits of X-ray photoelectron spectroscopy (XPS) technique for the quantification of nitrogen on the wood fiber ... The potential merits of X-ray photoelectron spectroscopy (XPS) technique for the quantification of nitrogen on the wood fiber ... Grigsby W, McDonald AG, Thumm A, Loxton C (2004) X-ray photoelectron spectroscopy determination of urea formaldehyde resin ... Quantification of urea formaldehyde resin in wood fibers using X-ray photoelectron spectroscopy and confocal laser scanning ...
Time-Resolved Photoelectron Spectroscopy using Hollow-Core Photonic Crystal Fibres at Heriot-Watt University, listed on ... Time-Resolved Photoelectron Spectroscopy using Hollow-Core Photonic Crystal Fibres Heriot-Watt University. , School of ... Using liquid microjet photoelectron spectroscopy to explore the redox properties of organic molecules in aqueous solution ... This project will combine HC-PCF sources with state-of-the art time-resolved photoelectron imaging spectroscopy to study non- ...
... Public Deposited ... Film surface compositions were analyzed via X-ray Photoelectron Spectroscopy 6 hours after irradiation and after one week of ...
Probing the early stages of solvation of cis-pinate dianions by water, acetonitrile, and methanol: a photoelectron spectroscopy ... Probing the early stages of solvation of cis-pinate dianions by water, acetonitrile, and methanol: a photoelectron spectroscopy ... and CH3CN by negative ion photoelectron spectroscopy and ab initio theoretical calculations. We found that cis-PA2− prefers ...
The resulting interface was probed with Hard X-ray Photoelectron Spectroscopy (HAXPES) using photon energies between 2 and 6 ... Formation of an interphase layer during deposition of cobalt onto tetraphenylporphyrin: a hard X-ray photoelectron spectroscopy ... Formation of an interphase layer during deposition of cobalt onto tetraphenylporphyrin: a hard X-ray photoelectron spectroscopy ...
  • The figure below shows the photoelectron spectra of both clean and 100 L phenol exposed TiO2 (110) surface. (lsu.edu)
  • Ultraviolet photoelectron spectroscopy (UPS) refers to the measurement of kinetic energy spectra of photoelectrons emitted by molecules which have absorbed ultraviolet photons, in order to determine molecular orbital energies in the valence region. (wikipedia.org)
  • The ultraviolet method (UPS) was pioneered by Feodor I. Vilesov, a physicist at St. Petersburg (Leningrad) State University in Russia (USSR) in 1961 to study the photoelectron spectra of free molecules in the gas phase. (wikipedia.org)
  • XPS belongs to the family of photoemission spectroscopies in which electron population spectra are obtained by irradiating a material with a beam of X-rays. (wikipedia.org)
  • He I photoelectron spectra of phenyl substituted ethenes: styrene (1), 1,1-diphenylethene (2), cis-stilbene (3), trans-stilbene (4), triphenylethene (5) and tetraphenyl- ethene (6). (degruyter.com)
  • Auger photoelectron coincidence spectroscopy (APECS) provides a means of simplifying spectra, allowing for the decomposition of these into components that have a common origin. (wiley.com)
  • We also report results for ongoing experiments on the flow tube reactions of the Group V metals Nb and Ta with butadiene, and the vibrationally-resolved photoelectron spectra of some of the organometallic reaction product anions. (osu.edu)
  • The photoelectron spectra of p-methylphenoxide reveal a photon energy dependence arising from electron autodetachment. (colorado.edu)
  • The full interpretation of the photoelectron spectra of the isomers of methylenephenoxide presents a far greater challenge with many subtleties. (colorado.edu)
  • The photoelectron spectra of indolide were obtained and interpreted. (colorado.edu)
  • Vibrationally-resolved photoelectron spectra of molybdenum vanadium oxo cluster anions with 2 to 5 oxygen atoms and measured using 2.33 eV, 3.49 eV and 4.66 eV photon energies generally exhibit broad and overlapping electronic states. (osu.edu)
  • photoelectron photoion coincidence spectra have been recorded as a function of the photon energy covering the valence range from 10 to 21 eV. (csic.es)
  • The method involves cryo-X-ray Photoelectron Spectroscopy (XPS) analyses of the outermost portion (within ~10 nm of the surface) of intact bacterial cells, followed by a multivariate curve resolution analysis of carbon spectra. (diva-portal.org)
  • Recent measurements on the carbon 1s photoelectron spectra of three chloroethanes show that this is not the case. (oregonstate.edu)
  • Ni3s, Ni3p and Ni2p x-ray photoelectron spectra of mono-and binuclear carboxylate complexes of nickel with various geometry of metal ions environment are obtained. (surrey.ac.uk)
  • Spectra were obtained using a Physical Electronics Model 5400 photoelectron spectrometer (equipped with an Al Kα [1486.6 eV] anode) with the samples undergoing no pretreatment after fabrication and then being mounted in a holder. (spectroscopyonline.com)
  • From this model we extract a relaxation time for the 1 2B3u state, which quantitatively agrees with those extracted from fits to the features in the photoelectron spectra derived from the images. (dur.ac.uk)
  • By comparison with reference photoelectron spectra (PES), the spectral information collected on the detected molecules yields their isomeric structure. (archives-ouvertes.fr)
  • Photoelectron spectra of iron-carbonyl cluster anions (Fe n (CO) - m ) were measured in the gas phase at the photon energy of 4.66 eV, using a magnetic bottle electron spectrometer. (elsevier.com)
  • The photoelectron spectra of the Fe n (CO) - 5n-1 anions show unresolved broad features, and the threshold energy (E T ) and the vertical detachment energy (VDE) were determined: The E T of Fe n (CO) - 5n-1 gradually increases by 0.1-0.3 eV with the cluster size. (elsevier.com)
  • X-ray photoelectron spectroscopy (XPS or ESCA) curve fitting procedures, reference materials and useful notes are listed here to provide a starting point for the consistent interpretation of XPS spectra. (xpsfitting.com)
  • Using the EUV and UV photoelectron spectra of solvated electrons, we succeeded in retrieving sharp electron kinetic energy distributions from the spectra broadened and energy shifted by inelastic scattering in liquids, overcoming an obstacle in ultrafast UV photoelectron spectroscopy of liquids. (sciencemag.org)
  • The aim of this paper is to clarify the assignments of X-ray photoelectron spectra of aluminium phosphate materials prepared from the reaction of phosphoric acid with three different aluminium precursors [Al(OH)3, Al(NO3)3 and AlCl3] at different annealing temperatures. (cf.ac.uk)
  • The production values of High Resolution Spectroscopy are high, diagrams are well reproduced and the whole text is lavishly illustrated with many spectra and diagrams of apparatus. (wiley.com)
  • Technological advancement including HAXPES (Hard X ray photoelectron spectroscopy) and hyphenated techniques further enhance growth opportunities. (grandviewresearch.com)
  • In addition, rising popularity of hyphenated technologies and other technological advancements such as hard X-ray photoelectron spectroscopy (HAXPES) has prompted the growth of the X-ray photoelectron spectroscopy market. (prsync.com)
  • The resulting interface was probed with Hard X-ray Photoelectron Spectroscopy (HAXPES) using photon energies between 2 and 6 keV to obtain a detailed depth profile of the chemical composition. (rsc.org)
  • Recent Advances in Hard X-ray Photoelectron Spectroscopy , edited by W. Drube, J. Eletron Spectrosc. (epjap.org)
  • We synthesize and characterize with high resolution transmission electron microscopy (HRTEM) 3.4, 5.3, and 9.5 nm diameter TiO 2 -supported Au nanoparticles with nearly spherical shape and measure their valence band using Au 5d subshell sensitive hard X-ray photoelectron spectroscopy (HAXPES) conducted at Spring-8. (osti.gov)
  • Angle resolved photoemission spectroscopy ARPES Photoelectron photoion coincidence spectroscopy PEPICO Time-resolved two-photon photoelectron spectroscopy Carlson T.A., "Photoelectron and Auger Spectroscopy" (Plenum Press, 1975) ISBN 0-306-33901-3 Vilesov, F. I. (wikipedia.org)
  • A pioneering experiment for the study of reaction networks in flames by using Photoelectron Photoion Coincidence (iPEPICO) spectroscopy was realized at the Synchrotron Light Source (SLS) from the Paul Scherer Institute (PSI). (dlr.de)
  • In situ flame chemistry tracing by imaging photoelectron photoion coincidence spectroscopy. (dlr.de)
  • Photoelectron photoion coincidence techniques offer universal, selective, sensitive and multiplexed chemical analysis tools that allows us to detect elusive and short-lived species isomer-selectively. (psi.ch)
  • This SP presents some challenges and strategies for the characterization of CNT-polymer composite systems by X-ray Photoelectron Spectroscopy (XPS). (nist.gov)
  • Here, we present the ambient pressure photoelectron spectroscopy characterization of a model electrolyte based on 1M bis(trifluoromethane)sulfonimide lithium salt in propylene carbonate. (lu.se)
  • Core-level photoelectron spectroscopy and valence-band photoelectron spectroscopy have served as means for the characterization of these films. (epfl.ch)
  • The current study is a characterization of one material in this class using X-ray photoelectron spectroscopy (XPS) to profile possible extraneously formed gadolinium, zinc, and tellurium molecules that can be observed both as possible dopants in the material by formation at high temperatures and the formation of surface species because of atmospheric oxidation resulting from handling in the open air. (spectroscopyonline.com)
  • X-ray photoelectron spectroscopy devices are used in the characterization of nanoparticles. (reportsanddata.com)
  • XPS, also known as Electron Spectroscopy for Chemical Analysis (ESCA), is now one of the most widely used tools in countless fields of science and engineering where advanced analysis of surfaces and interfaces is needed. (umu.se)
  • A few years later in 1967, Siegbahn published a comprehensive study of XPS, bringing instant recognition of the utility of XPS, which he referred to as Electron Spectroscopy for Chemical Analysis (ESCA). (wikipedia.org)
  • Yet XPS and the associated technique of Auger-electron spectroscopy (AES) are not yet developed to the stage where the data and its interpretation are unambiguous. (wiley.com)
  • XPS (X-ray Photoelectron Spectroscopy) is also known as ESCA (Electron Spectroscopy for Chemical Analysis) technique uses photoelectric effect created by x-rays and analyzes the electronic environment, surface composition, and atomic composition of the surface sample under study. (fractovia.org)
  • While the photoelectron kinetic energy distribution does not exhibit a clear signature of internal conversion, the photoelectron angular anisotropy unambiguously reveals the sudden change of electron configuration upon internal conversion. (mdpi.com)
  • Three features of small-molecule photoelectron spectroscopy are considered (1) The atom from which a photoelectron is emitted must have a recoil momentum equal to that of the emitted electron. (oregonstate.edu)
  • These results have important consequences for the use of inner-shell electron spectroscopy for quantitative analysis. (oregonstate.edu)
  • Journal of Electron Spectroscopy and Related Phenomena, 189(Suppl. (oregonstate.edu)
  • Journal of Electron Spectroscopy and Related Phenomena, 184 (8-10). (surrey.ac.uk)
  • NOTICE: this is the author's version of a work that was accepted for publication in Journal of Electron Spectroscopy and Related Phenomena. (surrey.ac.uk)
  • Here, we present the electron binding energy distributions of solvated electrons in liquid water, methanol, and ethanol accurately measured using extreme ultraviolet (EUV) photoelectron spectroscopy of liquids with a single-order high harmonic. (sciencemag.org)
  • In addition, measurements by use of X-ray diffraction, scanning electron microscopy/energy dispersive X-ray spectroscopy and transmission electron microscopy were performed. (chalmers.se)
  • 10182588: An personal Unleashing download Ultraviolet Photoelectron and Photoion Spectroscopy Auger Electron Spectroscopy Plasma Excitation in. (wolfgangvolling.de)
  • Download one of the Free Kindle is to cause filtering Kindle women on your download Ultraviolet Photoelectron and Photoion Spectroscopy Auger Electron Spectroscopy, scene, and viewer. (wolfgangvolling.de)
  • X-ray photoelectron spectroscopy (XPS) provides chemical information and can be exploited with either soft (SXPS) or hard X-rays (HAXPES) to vary the surface/bulk sensitivity. (diamond.ac.uk)
  • I09 is designed to provide both soft and hard X-rays for high-resolution studies of atomic and electronic structures of surfaces and interfaces using photoelectron spectroscopy, near edge X-ray absorption fine structure, X-ray standing waves and photoelectron diffraction. (diamond.ac.uk)
  • X-Ray Photoelectron Diffraction. (worldwidescience.org)
  • As we are heavy users of X-ray based techniques, including spectroscopy and diffraction, the question of how X-rays interact with matter is of great importance to us. (ucl.ac.uk)
  • We are part of a group of collaborators stretching from laboratory to synchrotron techniques, X-ray diffraction to X-ray spectroscopy, and experiment to theory, which is trying to establish a fundamental understanding of how the reaction of matter under X-ray radiation can be understood and what we can learn about the material itself. (ucl.ac.uk)
  • The materials prepared have been studied by X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), infrared spectroscopy and high-resolution solid-state 31P NMR spectroscopy. (cf.ac.uk)
  • This dissertation reports and interprets the results of experiments in which photoelectron spectroscopy was performed on a variety of aromatic anions. (colorado.edu)
  • We present a detailed account of the development, construction, and commissioning of a new experiment for studying the spectroscopy and ultrafast dynamics of molecular anions in the gas phase. (dur.ac.uk)
  • and a compact photoelectron imaging arrangement for anions, which negates the use of pulsed high voltages. (dur.ac.uk)
  • We use this instrument in conjunction with a femtosecond laser system to perform the first ultrafast time-resolved photoelectron imaging experiments on molecular anions generated through electrospray ionisation. (dur.ac.uk)
  • Evolution of electronic structures of nanoscale biphenyl cluster anions, (BP) n - (n = 2-100), have been studied by photoelectron spectroscopy in a size-selective fashion. (elsevier.com)
  • The method was later extended to the study of solid surfaces where it is usually described as photoemission spectroscopy (PES). (wikipedia.org)
  • We describe the development and applications of novel instrumentation for photoemission spectroscopy of solid or liquid surfaces in the presence of gases under ambient conditions or pressure and temperature. (unt.edu)
  • We discuss the first two generations of Ambient Pressure PhotoEmission Spectroscopy (APPES) instruments developed at synchrotron light sources (ALS in Berkeley and BESSY in Berlin), with special focus on the Berkeley instruments. (unt.edu)
  • Angle-resolved photoemission spectroscopy (ARPES) is one of the most powerful techniques in modern experimental condensed matter physics, since it provides us with important information on the electronic structure of materials. (tu-ilmenau.de)
  • Techniques such as angular resolved photoemission (ARPES), resonant photoemission spectroscopy (RESPES) and x-ray absorption spectroscopy have been applied, using synchrotron radiation. (dissertations.se)
  • Conical intersections between D 1 ( π −1 ) and D 0 ( n −1 ) and also between the Rydberg state with a D 1 ion core and that with a D 0 ion core of pyrazine are studied by He(I) photoelectron spectroscopy, pulsed field ionization photoelectron spectroscopy and one-color resonance-enhanced multiphoton ionization spectroscopy. (mdpi.com)
  • We report in-situ Angle-Resolved Photoelectron Spectroscopy (ARPES) studies of (LaMnO$_{3}$)$_{2n}$(SrMnO$_{3}$)$_{n}$ superlattices. (aps.org)
  • This system offers possibility of small area analysis and angle-resolved photoelectron spectroscopy. (tudelft.nl)
  • Researchers at Institute for Molecular Science (IMS), Innovation Research Center for Fuel Cells, University of Electro-Communications, Research Center for Materials Science, Nagoya University, and JASRI (Japan Synchrotron Radiation Research Institute), have improved an ambient-pressure photoelectron spectroscopy instrument using hard X-rays*1 produced at SPring-8*2 and succeeded in photoelectron spectrometry*3 under real atmospheric pressure for the first time in the world. (innovations-report.com)
  • In recent years, in order to fill this gap, an apparatus called "ambient pressure photoelectron spectroscopy" has been developed that enables measurement under gas atmosphere. (innovations-report.com)
  • Operando ambient pressure photoelectron spectroscopy in realistic battery environments is a key development towards probing the functionality of the electrode/electrolyte interface in lithium-ion batteries that is not possible with conventional photoelectron spectroscopy. (lu.se)
  • For the first time, we show ambient pressure photoelectron spectroscopy data of propylene carbonate in the liquid phase by using solvent vapor as the stabilizing environment. (lu.se)
  • High resolution threshold photoelectron spectroscopy to produce internal energy selected ions and probe photochemical processes energy. (psi.ch)
  • Photoelectron spectroscopy of the isomers of methylphenoxide reveals that these molecules display minimal vibrational excitation upon photodetachment, accessing the electronic ground and first excited state of the corresponding radicals. (colorado.edu)
  • This approach will be combined with time-resolved photoelectron spectroscopy to study the ultrafast dynamics of non-radiative energy redistribution within the excited states of small, biologically relevant molecules. (findaphd.com)
  • This project will combine HC-PCF sources with state-of-the art time-resolved photoelectron imaging spectroscopy to study non-radiative energy redistribution in series of systematically substituted molecules. (findaphd.com)
  • It has been known since the 70s that the ionization from an ensemble of randomly oriented chiral molecules, using circularly polarized light pulse,leads to a strong forward-backward asymmetry in the number of emitted photoelectrons, along the light propagation axis (Photoelectron Circular Dichroism,PECD). (archives-ouvertes.fr)
  • First, I discuss the strong-field ionization of gas-phase atoms and molecules, identify a new structure in the photoelectron angular distribution of xenon gas, and explain this structure as a result of electrons colliding with the Coulomb potential of the ion. (colorado.edu)
  • Time-resolved photoelectron spectroscopy (TRPES) has emerged as the gold standard technique to interrogate non-adiabatic excited state dynamics in isolated molecules but, to date, has been mostly limited by a wavelength coverage limited the UV to IR. (mbi-berlin.de)
  • Publications] I.Watanabe: 'Photoelectron emission study of alternant hydrocarbon molecules in solution. (nii.ac.jp)
  • Publications] Iwao Watanabe: 'Electronic States of Ions and Molecules in Solution Studied by Photoelectron Emission Spectroscopy,in 'Structure and Dynamics in Solution',ed. by H.Yamatera and H.Ohtaki. (nii.ac.jp)
  • Publications] I. Watanabe: 'Electronic states of ions and molecules in solution studied by photoelectron emission spectroscopy. (nii.ac.jp)
  • Molecules And Radiation: An Introduction To Modern Molecular Spectroscopy. (tradebit.com)
  • Original work is presented which investigates the spectroscopy and ultrafast excited dynamics of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion. (dur.ac.uk)
  • Finally, we describe, for the first time, a formulism which allows ultrafast relaxation timescales to be extracted from the photoelectron angular distributions of isoenergetic photoelectron features. (dur.ac.uk)
  • However, the upper-pressure limit of operation in a general ambient pressure photoelectron spectrometer is approximately 5,000 Pa. (innovations-report.com)
  • A problem upon measurement using ambient pressure photoelectron spectrometer is "energy decay" of the photoelectrons emitted from the sample exposed to light, which is due to scattering caused by gas. (innovations-report.com)
  • Here, we applied X-ray photoelectron spectroscopy, soft X-ray absorption near-edge spectroscopy, and other techniques in order to determine the surface composition and to specify the citrate-related species at Ag nanoparticles immobilized from the dense hydrosol prepared using room-temperature reduction of aqueous Ag + ions with ferrous ions and citrate as stabilizer (Carey Lea method). (kirensky.ru)
  • The frontier electronic structures of Ru(tcterpy)(NCS) 3 [black dye (BD)] and Ru(dcbpy) 2 (NCS) 2 (N719) have been investigated by photoelectron spectroscopy (PES), X-ray absorption spectroscopy (XAS) and resonant photoelectron spectroscopy (RPES). (diva-portal.org)
  • This thesis presents HELIOS, an in-house laboratory for time-resolved pump-probe spectroscopy with extreme-ultraviolet (XUV) probe radiation. (dissertations.se)
  • Time-resolved photoelectron imaging experiments explore the relaxation dynamics of its first excited 1 2B3u state, which we show undergoes internal conversion back to the 2B2g ground state on a timescale of 650 fs. (dur.ac.uk)
  • The primary photophysics of the Avena sativa phototropin 1 LOV2 domain observed with time-resolved emission spectroscopy. (uchicago.edu)
  • Briefly, the full width of the photoelectron spectrum (from the highest kinetic energy/lowest binding energy point to the low kinetic energy cutoff) is measured and subtracted from the photon energy of the exciting radiation, and the difference is the work function. (wikipedia.org)
  • The work function-like term ϕ {\displaystyle \phi } can be thought of as an adjustable instrumental correction factor that accounts for the few eV of kinetic energy given up by the photoelectron as it gets emitted from the bulk and absorbed by the detector. (wikipedia.org)
  • First, we used hard X-rays that has higher energy compared to soft X-rays and boosted kinetic energy of the photoelectrons. (innovations-report.com)
  • The interfacial chemistry between in-situ thermally evaporated magnesium and a polyethyleneterephthalate (PET) film is studied by X-ray photoelectron spectroscopy (XPS). (ubc.ca)
  • In situ electrochemical X-ray photoelectron spectroscopy (XPS) apparatus, which allows XPS at solid/liquid interfaces under potential control, was constructed utilizing a microcell with an ultra-thin Si membrane, which separates vacuum and a solution. (hokudai.ac.jp)
  • Prior to 1960, virtually all measurements of photoelectron kinetic energies were for electrons emitted from metals and other solid surfaces. (wikipedia.org)
  • In addition to these photoelectron studies, the results and conclusions of an experiment in which HCl is scattered off atomically flat Au (111) surfaces are also presented. (colorado.edu)
  • X-ray photoelectron spectroscopy (XPS) is one of a set of tools that have been used to characterize wood surfaces. (usda.gov)
  • Hence, three co-precipitated nanocrystalline indium tin oxide powders of different particle size were investigated by use of X-ray photoelectron spectroscopy. (chalmers.se)
  • Investigating such processes using pump-probe spectroscopy is important for understanding photo-protection mechanisms that take place in, for example, DNA and the melanin pigmentation system, serving to protect the body from the potentially damaging effects of UV light. (findaphd.com)
  • The electronic states of adsorption of phenol on TiO2 (110) is investigated by Ultraviolet Photoelectron Spectroscopy (UPS) as a well-defined model for environmentally persistent free radicals. (lsu.edu)
  • Turner referred to the method as "molecular photoelectron spectroscopy", now usually "Ultraviolet photoelectron spectroscopy" or UPS. (wikipedia.org)
  • Rabalais J.W. "Principles of Ultraviolet Photoelectron Spectroscopy" (Wiley 1977) ISBN 0-471-70285-4 Turner, David W. (1970). (wikipedia.org)
  • In parallel with Siegbahn's work, David Turner at Imperial College London (and later at Oxford University) developed ultraviolet photoelectron spectroscopy (UPS) for molecular species using helium lamps. (wikipedia.org)
  • The electronic and geometric structures of poly [3-(4-octylphenyl)thiophene] have been studied by X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS, respectively). (diva-portal.org)
  • How to find this download Ultraviolet Photoelectron and Photoion: Tawfik MA, Abou El-Ella SS, Abouzouna ZS. (wolfgangvolling.de)
  • In this download Ultraviolet Photoelectron, we have an date taking the book for diagnostic critique and Take the pre-core, much Case, and Inorganic problem of the STRATOS Volume. (wolfgangvolling.de)
  • having this download Ultraviolet Photoelectron and Photoion breathed me ago to the cycle while i sent to focus 36th selection. (wolfgangvolling.de)
  • These are similar to those seen in EXAFS and can be accounted for by considering backscattering of the photoelectrons from the chlorine atoms. (oregonstate.edu)
  • The 30 μm aperture created at the tip is the port where photoelectrons enter the spectrometer. (innovations-report.com)
  • Next, we created an extremely tiny aperture of 30 μm in diameter (figure left), which is a port that accepts photoelectrons into the spectrometer. (innovations-report.com)
  • Professor Toshihiko Yokoyama (IMS) has a vision of possibilities for future applications of the novel photoelectron spectrometer. (innovations-report.com)
  • Scanning Auger Microprobe, AES/SAM (PHI 4300 SAM), equipped with a 5 keV ion-gun for depth profiling, a Quadrupole Mass Spectrometer (Pfeiffer QMS 422) for Secondary Ion Mass Spectroscopy and Zalar sample rotation for high resolution depth profiling. (tudelft.nl)
  • X-ray Photoelectron Spectrometer, XPS (PHI 5400 ESCA), equipped with a dual anode (Al/Mg) X-ray source and a 5 keV ion-gun for depth profiling and Zalar sample rotation for high resolution depth profiling. (tudelft.nl)
  • Our spectrometer combines next generation technologies to provide quantitative, real time parallel imaging with the highest resolution spectroscopy in all analysis areas. (cardiff.ac.uk)
  • About 1956 Kai Siegbahn developed X-ray photoelectron spectroscopy (XPS) for surface chemical analysis. (wikipedia.org)
  • The Material Measurement Science Division at NIST performs surface chemical analysis using X-ray Photoelectron Spectroscoy (XPS) with capabilities for routine. (nist.gov)
  • Abstract In this thesis, the high temperature superconductors (HTSC) La2CuO4+x and Bi2Sr2CaCu2O8+d and the colossal magnetoresistive (CMR) La1-xSrxMnO3 have been studied by photoelectron spectroscopy. (dissertations.se)
  • ABSTRACT This thesis work investigates the ability of x-ray photoelectron spectroscopy(XPS) to assess the Mn concentration in the Ga1-xMnxAs. (chalmers.se)
  • This unified treatment introduces upper-level undergraduates and graduate students to the concepts and the methods of molecular spectroscopy and applications. (tradebit.com)
  • We report the 488 nm photoelectron spectrum of the NbCr$^{-}$ anion. (osu.edu)
  • The photoelectron spectrum of TCNQ- is measured at 3.1 eV, which is used to gain insight into the electronic structure and geometries of both the anion and neutral states. (dur.ac.uk)
  • The photoelectron spectrum of a molecule contains a series of peaks each corresponding to one valence-region molecular orbital energy level. (wikipedia.org)
  • 2) Inner-shell photoionization is essentially an atomic process, and it is expected that the intensity for emission of a photoelectron from the core of an atom in a molecule will be independent of its chemical environment. (oregonstate.edu)
  • Vibrational structure is observed in the first photoelectron band of this molecule. (open.ac.uk)
  • The plasmonic properties of the obtained colloids, as well as their adsorption capability, were tested by surface-enhanced Raman scattering (SERS) spectroscopy using 2,2′-bipyridine as a probe molecule. (mdpi.com)
  • He I photoelectron spectrum of 2-phenyloxirane with the B system in high resolution. (degruyter.com)
  • Calculations have also been carried out to determine the ionization energies and fine structure of the lowest ionic state of isobutyl acetate and are compared with a photoelectron spectrum (from 9.5 to 16.7 eV), recorded for the first time. (open.ac.uk)
  • In this work, we studied the structures and energetics of the solvated clusters of cis -pinate ( cis -PA 2− ), the doubly deprotonated dicarboxylate of cis -pinic acid, with H 2 O, CH 3 OH, and CH 3 CN by negative ion photoelectron spectroscopy and ab initio theoretical calculations. (rsc.org)
  • The early experiments used monochromatized radiation from a hydrogen discharge and a retarding potential analyzer to measure the photoelectron energies. (wikipedia.org)
  • 1. Reorganization energy of solvent by the photoelectron emission from thiocyanate : The external ionization energies of thiocyanate in various solvents were measured. (nii.ac.jp)
  • Publications] I.Watanabe: 'Photoelectron emission study of iron(II) and cobalt(II) complexes in aqueous solution.Reorganization energies. (nii.ac.jp)
  • Publications] I.Watanabe: 'Photoelectron emission study of halide ions in solutions.Reorganization energies. (nii.ac.jp)
  • The accompanying photoelectron lines, converted to binding energies (essentially, ionization energies) shown on the x -axis, correspond to the different levels of copper. (spectroscopyonline.com)
  • Second, I describe a new method to perform photoelectron and photoion spectroscopy on single, isolated nanoparticles and demonstrate this technique by observing and controlling shock waves in nanoplasmas. (colorado.edu)
  • The binding energy of a photoelectron reflects the bonding environment it was emitted from. (utm.my)
  • On the side branch of the beamline, we operate a cluster source to perform cluster ion mass-selected photoelectron spectroscopy measurements. (psi.ch)
  • Tuneable VUV photoelectron spectroscopy to study size effects of cluster ions relevant to e.g. chemisorption. (psi.ch)
  • Ultra thin Al2O3 and HfO2 films (UP to similar to6 nm) were deposited on SiO2/Si wafers by atomic layer chemical vapour deposition (ALCVD(TM,1)) and studied by exsitu X-ray photoelectron spectroscopy (XPS) and spectroscopic ellipsometry (SE). (worldwidescience.org)
  • Funded by a £675,000 grant from the Engineering and Physical Sciences Research Council (EPSRC), LiPPS is a unique X-ray Photoelectron Spectroscopy (XPS) machine which allows researchers to take atomistic measurements of the surface of liquids for the first time. (nanowerk.com)
  • Advances in Near-Infrared Measurements, Volume 1 provides an overview of near-infrared spectroscopy. (tradebit.com)
  • Conventional photoelectron spectroscopy can only measure samples under high vacuum, while many catalytic reactions occur under atmospheric pressure. (innovations-report.com)
  • This study examines surface chemical characteristics of bulk quartz powders using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) with the aim of identifying structures potentially relevant to the toxic effect. (biomedcentral.com)
  • X-ray fluorescence spectrometers, FTIR spectrometers and X-ray photoelectron spectrometers enable researchers and material analysts to probe the chemical composition of materials ranging from ultra thin-films to bulk powders used in product development and materials troubleshooting. (news-medical.net)
  • X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique based on the photoelectric effect that can identify the elements that exist within a material (elemental composition) or are covering its surface, as well as their chemical state, and the overall electronic structure and density of the electronic states in the material. (wikipedia.org)
  • right) The peaks represent the photoelectron spectroscopic signals of gold thin film detected under atmospheric pressure of air. (innovations-report.com)
  • Beyond investigating bulk properties of different crystal polymorphs and thin films orientations we are particularly interested in the study of interfaces in power electronics using X-ray spectroscopy. (ucl.ac.uk)
  • In this PhD. thesis, we aim to unravel the potential development on liquids, dielectrics as well as the liquid/solid interfaces during AC and DC excitation in a chemically resolved fashion using the UHV compatible non-aqueous liquids in a basic electrowetting on dielectrics configuration within X-Ray Photoelectron Spectroscopy (XPS) chamber. (bilkent.edu.tr)
  • The project is well suited to those with an interest in non-linear optics, lasers and spectroscopy. (findaphd.com)
  • Lasers and Laser Spectroscopy. (wiley.com)
  • X-Ray Photoelectron Spectroscopy is a quantitative analysis tool that can provide the elemental composition (excluding hydrogen) and information on chemical bonding environments and oxidation states within the upper 1-10 nm of the surface. (utm.my)
  • IPU og DTU kan blandt andet tilbyde kemisk karakterisering af materialer og overflader med Glow Discharge Optical Emission Spectroscopy (GD-OES). (ipu.dk)
  • Publications] I.Watanabe: 'Photoelectron emission study of phenols in aqueous and organic solvents.Hydrogenーbond effects on ionization potentials. (nii.ac.jp)
  • Publications] I. Watanabe: 'Photoelectron emission study of ion(II) and cobalt(II) complexes in aqueous solution. (nii.ac.jp)