Surfaces and interfaces using photoelectron spectroscopy. Medical search. Frequent questions

Adsorption and desorption events can be studied at atomically flat single crystal surfaces as a function of applied potential, time, and solution conditions using spectroscopy, scanning probe microscopy and surface X-ray scattering. (wikipedia.org)
The atomic-scale structure and chemical properties of mineral-solution interfaces are studied using in situ synchrotron X-ray techniques such as X-ray reflectivity, X-ray standing waves, and X-ray absorption spectroscopy as well as scanning probe microscopy. (wikipedia.org)

Relationships between the composition, structure, and chemical behavior of these surfaces are studied using ultra-high vacuum techniques, including adsorption and temperature-programmed desorption of molecules, scanning tunneling microscopy, low energy electron diffraction, and Auger electron spectroscopy. (wikipedia.org)
Since 1972 he has applied surface and near-surface analysis techniques such as x-ray photoelectron spectroscopy (XPS or ESCA) and Auger microprobe to the solution of surface chemistry and coating problems. (experts.com)
Surface science techniques: low energy electron diffraction (LEED), reflection high energy electron diffraction (RHEED), Auger electron spectroscopy, secondary ion mass spectroscopy (SIMS), sample preparations in UHV, molecular beam epitaxy (MBE), positron annihilation-induced Auger electron spectroscopy (PAES). (infim.ro)
This requires ultra-high vacuum (UHV) and the routine application of techniques such as low energy electron diffraction (LEED), reflection high energy electron diffraction (RHEED), Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS). (warwick.ac.uk)
At BESSY II, Auger photoelectron coincidence spectroscopy (APECS) can be used to precisely determine the localisation of d electrons in cobalt compared to nickel and copper. (spectroscopyeurope.com)

By photoemission spectroscopy (XPS), scanning tunneling microscopy/spectroscopy (STM/STS), temperature programmed desorption/reaction (TPD/TPR) and density functional theory calculations (DFT), chemical reactions and diffusion processes during the formation of interfaces/interphases, and their electronic structures are investigated. (uni-marburg.de)
Exploiting dark autoionising states for enhancing extreme ultraviolet laser power relevant for advanced ultrafast science applications such as angle-resolved photoemission spectroscopy and photoemission electron microscopy. (spectroscopyeurope.com)
Using time-resolved X-ray photoemission spectroscopy, scientists are for the first time analysing at the femtosecond scale the processes in a model system for organic solar cells. (spectroscopyeurope.com)
Then, the electronic charge transfer in dark and light conditions is assessed with electrochemical impedance spectroscopy and valence band (VB) X-ray photoemission spectroscopy. (springeropen.com)
The electronic charge transfer is investigated by electrochemical impedance spectroscopy (EIS) and with valence band X-ray photoemission spectroscopy (VB PES). (springeropen.com)

Dr. Charles R. Anderson has long specialized in the Characterization of Surfaces, Interfaces, Thin Films and Coatings . (experts.com)
We want to bridge the gap between surface characterization (typically done on ideal model surfaces) and device processing, by investigating semiconductor nanostructures during device operation at the atomic scale. (lu.se)
The development of a time resolved, in-situ characterization of the internal interfaces of these superlattices is described. (caltech.edu)
We have done so by using a palette of experiments, spanning from ultrafast spectroscopy, via Stark effect methods, terahertz techniques, photocurrent measurements, to nanoscale mobility characterization. (uzh.ch)
In this work, III-V nanowire and nanosheet devices are studied with an emphasis on surfaces and interfaces, using a wide range of characterization methods. (lu.se)
The dissertation explores the fabrication of novel nano-devices and the characterization of their surface chemistry, topography, electronic properties, electrical transport and interaction with photons. (lu.se)
The characterization techniques include scanning tunneling microscopy/spectroscopy (STM/S) for atomic level topography and electronic properties. (lu.se)
In conclusion, in this thesis the surfaces and interfaces of low-dimensional materials for future device applications are studied using many different characterization methods. (lu.se)

Photoelectron spectroscopy (PES): X-ray photoelectron spectroscopy (XPS) or electronic structure for chemical analysis (ESCA), core-level and valence-band PES, photoelectron diffraction (PED), Fermi surface mapping, angle-resolved PES, angle-resolved ultraviolet photoelectron spectroscopy (ARUPS), spin-resolved PES. (infim.ro)

Photoelectron Spectroscopy (PES) and Differential Scanning Calorimetry (DSC) are used to investigate the surface chemistry of electrodes in relation to their electrochemical performance. (dissertations.se)
The most promising thermal behaviour is found for graphite anodes cycled with the anion receptor, tris(pentafluorophenyl)borane, which reduces salt reactions and increases the onset temperature from ~80 °C to ~150 °C.The electrochemical performance and surface chemistry of Swedish natural graphite, carbon-treated LiFePO4 and anodes from high-power lithium-ion batteries are also investigated. (dissertations.se)

Reliable Work Function Determination of Multicomponent Surfaces and Interfaces: The Role of Electrostatic Potentials in Ultraviolet Photoelectron Spectroscopy. (mpg.de)
The effects of ultraviolet-ozone (UVO) oxidation of polyethyleneterephthalate (PET) surfaces have been studied using atomic force microscopy and X-ray photoelectron spectroscopy. (dundee.ac.uk)
UHV X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy systems have unravelled the Na interaction process at Na/CuPc and Na/F16CuPc interfaces. (spectroscopyeurope.com)
The valence electronic structure of in situ prepared samples, i.e., pentacene evaporated onto Sm surfaces and vice versa, was investigated with ultraviolet photoelectron spectroscopy. (princeton.edu)

The journal encourages contributions in the general area of atomic, molecular, ionic, liquid and solid state spectroscopy carried out using electron impact, synchrotron radiation (including free electron lasers) and short wavelength lasers. (materialstoday.com)

Coincidence spectroscopy: photoelectron-photoion-photoion coincidences (PEPIPICO), zero electron kinetic energy (ZEKE) spectroscopy, threshold electron spectroscopy. (infim.ro)

This thesis describes the characterisation and treatment of electrode interfaces in lithium-ion batteries. (dissertations.se)
Detailed surface characterisation was used to investigate anode-electrolyte interface evolution. (nanoge.org)
X-ray photoelectron spectroscopy (XPS) and surface characterisation techniques have contributed a wealth of information to battery research. (pankhursttrust.org)

Using advanced in situ spectroscopy techniques, scientists at Binghamton University and Brookhaven Lab gain new insights into catalytic oxidation. (spectroscopyeurope.com)

Over the last few years Free Electrons Lasers (FEL) have developed as a powerful tool to perform ultrafast spectroscopy in the XUV, Soft- and Hard- X-ray. (psi.ch)

It includes the fields of surface chemistry and surface physics. (wikipedia.org)
The field of surface chemistry started with heterogeneous catalysis pioneered by Paul Sabatier on hydrogenation and Fritz Haber on the Haber process. (wikipedia.org)
Most recent developments in surface sciences include the 2007 Nobel prize of Chemistry winner Gerhard Ertl's advancements in surface chemistry, specifically his investigation of the interaction between carbon monoxide molecules and platinum surfaces. (wikipedia.org)
Surface chemistry can be roughly defined as the study of chemical reactions at interfaces. (wikipedia.org)
It overlaps with surface chemistry. (wikipedia.org)
The origin of the apparent negative charge at hydrophobic-water interfaces has fueled debates in the physical chemistry community for decades. (nature.com)
In the first major topic, the surface coordination chemistry of thin films formed by porphyrinoid molecules with coinage metals - the latter either as crystalline substrate surface or dosed onto the films as atoms - is characterized. (uni-marburg.de)
Surface roughness and chemistry was also characterized before and after cleaning, as these are influential factors affecting the efficacy of direct bonding. (uwaterloo.ca)
The advantage of the ammonium bath as opposed to a rinse with deionized (DI) water is proposed in the surface chemistry analysis through X-ray photoelectron spectroscopy (XPS), which showed nitrogen incorporation at the bonding interface. (uwaterloo.ca)
The materials were investigated with X-ray diffraction, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy to determine the microstructure, the interface chemistry and the surface chemistry of the various impregnated samples. (dtu.dk)
It is indicated that interactions between surfactant, nanoparticles, impregnation solution and the LSM-YSZ composite take place which can locally affect the surface and interface chemistry of the investigated materials. (dtu.dk)
Images of surface chemistry can be acquired with spatial resolution of a few microns over several millimetres. (pankhursttrust.org)
In the final part of the talk I will show initial results on the surface chemistry of BiVO 4 studied under operando conditions with near-ambient pressure XPS, and on in-line XPS studies of ALD-grown TiO 2 protection layers. (uzh.ch)
Synchrotron based X-ray techniques, mainly X-ray photoelectron spectroscopy (XPS) is used for evaluating surface chemistry. (lu.se)
Surface treatment processes, e.g., ultra-high vacuum (UHV) annealing, digital etchants, atomic hydrogen cleaning, and atomic layer deposition (ALD), are applied and the resulting surface chemistry, structure and electronic properties measured. (lu.se)

X-ray absorption: extended X-ray absrption fine structure (EXAFS), X-ray absorption near-edge structure (XANES), near-edge absorption fine structure (NEXAFS), X-ray absorption spectroscopy (XAS), X-ray fluorescence. (infim.ro)
The absorption lengths in superlattices with identical bandgaps but whose interfaces were formed in different ways varied by as much as a factor of two. (caltech.edu)
Currently, we are developing new strategies in X-ray photoelectron spectroscopy (XPS), nanoparticle-enhanced Raman spectroscopy and X-ray absorption spectroscopy (XAS), often in collaboration with research groups at synchrotrons. (universiteitleiden.nl)
To be fully functional, the electric charge generated in the dye upon light absorption needs to be transferred to the photoelectrode, i.e. the interface between the dye and the photoelectrode must warrant proper charge transfer for electrons or holes. (springeropen.com)
In x-ray absorption spectroscopy (XAS) the energy of the absorbed photon raises an electron from a deeply bound state into unoccupied bound states or it gains enough energy to escape the atom. (lu.se)

Surface physics can be roughly defined as the study of physical interactions that occur at interfaces. (wikipedia.org)
Some of the topics investigated in surface physics include friction, surface states, surface diffusion, surface reconstruction, surface phonons and plasmons, epitaxy, the emission and tunneling of electrons, spintronics, and the self-assembly of nanostructures on surfaces. (wikipedia.org)

Time of flight secondary ion mass spectrometry (ToF-SIMS) and x-ray photoelectron spectroscopy (XPS), complimented by optical microscopy and scanning electron microscopy (SEM), were used to probe the composition of an oxide layer and indicate that chlorine and iron are incorporated into the oxide during cycling. (nanoge.org)

Resonant X-ray Fluorescence Spectroscopy of Correlated Systems: A Probe of Charge-Transfer Excitations. (cuny.edu)

Surface science is of particular importance to the fields of heterogeneous catalysis, electrochemistry, and geochemistry. (wikipedia.org)
Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others. (nanoge.org)

Gerhard Ertl in 1974 described for the first time the adsorption of hydrogen on a palladium surface using a novel technique called LEED. (wikipedia.org)

This can be due to either chemisorption or physisorption, and the strength of molecular adsorption to a catalyst surface is critically important to the catalyst's performance (see Sabatier principle). (wikipedia.org)
For example, studies of heavy metal or actinide adsorption onto mineral surfaces reveal molecular-scale details of adsorption, enabling more accurate predictions of how these contaminants travel through soils or disrupt natural dissolution-precipitation cycles. (wikipedia.org)
Our study provides substantial evidence that the efficiency of the self-cleaning process and the quality of the resulting semiconductor-oxide interface can be controlled by the molecular adsorption process of the ALD precursors, rather than the subsequent oxide formation. (lu.se)

He especially enjoys integrating the results of multiple analytic techniques (surface analysis, thermal analysis, FTIR, SEM/EDX, optical microscopy)to solve tough materials problems. (experts.com)

We also present time-resolved studies of the growth fronts of InAs/GainSb strained layer superlattices and investigations of surface anion exchange reactions. (caltech.edu)

Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid-liquid interfaces, solid-gas interfaces, solid-vacuum interfaces, and liquid-gas interfaces. (wikipedia.org)
In addition, interface and colloid science studies macroscopic phenomena that occur in heterogeneous systems due to peculiarities of interfaces. (wikipedia.org)
Geologic phenomena such as iron cycling and soil contamination are controlled by the interfaces between minerals and their environment. (wikipedia.org)
Here, we make an important leap in our understanding of this problem providing a framework that helps rationalize the observed phenomena that is rooted in what we propose is a generic charge transfer mechanism associated with the interfacial structure at the surface of water and oil. (nature.com)

Phonon calcula- tions show that TiN interfaces have a stabilization effect on the lattice dynamics. (diva-portal.org)

The here presented surface reaction allows in situ synthesis of giant hexagonal macrocycles consisting of thirty phenylene units. (uni-marburg.de)
Here, we directly observe the chemical reactions at the surface during the first cycle of hafnium dioxide deposition on indium arsenide under realistic synthesis conditions using photoelectron spectroscopy. (lu.se)
Sequential infiltration synthesis with grazing incidence XRF, XPS and SEM combined with ED X-ray spectroscopy are used for quantification. (spectroscopyeurope.com)

Reaction mechanisms can also be clarified due to the atomic-scale precision of surface science measurements. (wikipedia.org)
Crucial to achieving superior device performance are the chemical reactions during the first deposition cycle, which could ultimately result in atomic-scale perfection of the semiconductor-oxide interface. (lu.se)
Surface roughness was measured using optical interferometry and atomic force microscopy (AFM). (uwaterloo.ca)
We use scanning tunneling microscopy and atomic force microscopy in different newly developed setups for operando surface studies of technologically relevant nanostructure devices. (lu.se)
We apply X-ray photoelectron spectroscopy in order to obtain chemical information from nanostructure surfaces and interfaces and correlate it with atomic-scale structural and electronic properties. (lu.se)
It was also observed that the relative atomic concentration of strontium increased on the LSM-YSZ surface with increasing amount of SDC nanoparticles. (dtu.dk)
Determining the atomic structure, chemical behaviour and electronic properties of a surface or interface is challenging. (warwick.ac.uk)
Energy is transferred to or from these carrier molecules in electrocatalytic reactions in the few atomic layers around the electrode-electrolyte interface. (universiteitleiden.nl)

The behavior of an electrode-electrolyte interface is affected by the distribution of ions in the liquid phase next to the interface forming the electrical double layer. (wikipedia.org)
Surface film formation at the electrode/electrolyte interface in lithium-ion batteries has a crucial impact on battery performance and safety. (dissertations.se)
Several electrolyte salts, additives and an anion receptor have been exploited to modify the surface film composition. (dissertations.se)
This chapter aims at categorizing the typical approaches used to modify TiO2 in the domain of DSCs such as through TiO2 paste additives, TiO2 doping, metal oxides inclusion, dye solution co-adsorbing additives, post staining surface treatment additives and electrolyte additives. (intechopen.com)
The ex-situ surface analysis suggests that changes in the cycling performance correlate with changes in the composition of the solid electrolyte interface (SEI) on the surface of binder free (BF) graphite electrode. (uri.edu)
The central theme of Rik Mom's research group is to identify what the electrode-electrolyte interface looks like when electrocatalysis is taking place. (universiteitleiden.nl)
Using specialized forms of Raman and X-ray spectroscopy, we study the chemical state and bonding environment of the electrode surface and near-surface electrolyte. (universiteitleiden.nl)
The key challenge is to specifically probe the electrode-electrolyte interface, and not the bulk electrode/electrolyte around it. (universiteitleiden.nl)
However, AGDIB development is held back by a lack of fundamental understanding, particularly of the processes at the electrode-electrolyte interfaces. (nanoge.org)
The acidic electrolyte, while non-flammable, poses challenges of corrosion affecting all cell components [4-5] and the processes of corrosion, passivation and dendrite formation at the anode surface are not yet well understood. (nanoge.org)
Motivated by promising work on an optimised graphene nanoplatelet cathode and AlCl 3 -trimethylamine hydrochloride electrolyte [9], this work aims to complete understanding of the device by studying the aluminium anode surface and the impact of device configuration. (nanoge.org)
This work reveals that the evolution of the anode-electrolyte interface is more complex than previously assumed, and how careful consideration of device architecture can play a significant role in optimising this crucial phenomenon and improve device performance. (nanoge.org)
Limitations such as dendritic Li growth and insulating secondary electrolyte interphase (SEI) layer formation are being addressed by XPS and complementary surface analysis. (pankhursttrust.org)
Use of a conventional monatomic Ar + ion source has been demonstrated to induce Li + ion migration through the electrolyte material towards the electrolyte/electrode interface. (pankhursttrust.org)

X-ray photoelectron spectroscopy (XPS) studies of anion exchange reactions on the growth fronts of these superlattices are reported. (caltech.edu)

Using the RHEED and XPS results, a real-time, indirect measurement of surface exchange reactions was developed. (caltech.edu)

Most of the group's projects involve combining several experimental approaches, along with theoretical methods, to gain a comprehensive picture of a given surface, interface or material. (warwick.ac.uk)

The most common interpretation given to explain this observation is that negatively charged hydroxide ions (OH - ) bind strongly to the interfaces. (nature.com)
In this report, we assert that the negative charge at extended hydrophobic interfaces does not require the binding of \({{\rm{OH}}}^{-}\) ions. (nature.com)

Because a given surface structure or epitaxial interface can rarely be understood using a single method, our scientific work depends on several sophisticated experimental techniques able to overcome these difficulties. (warwick.ac.uk)
We also support the development of local facilities at the MaxIV laboratories and at the Lund Laser Center by e.g. advising and designing the experimental spectroscopy end-station at FEMTOMAX. (lu.se)

Raman and X-ray photoelectron spectroscopies and X-ray diffraction have shown the underlying mechanisms leading to failure of energy storage devices. (spectroscopyeurope.com)

It is closely related to surface engineering, which aims at modifying the chemical composition of a surface by incorporation of selected elements or functional groups that produce various desired effects or improvements in the properties of the surface or interface. (wikipedia.org)

To achieve this, we modify techniques from the traditional surface science toolbox to make them compatible with electrochemistry. (universiteitleiden.nl)

Besides the interfacial chemical bond, i.e., between the surface and the metal complex, secondary effects - such as charge transfer and weak band bending - are characterized in detail for cobalt phthalocyanine adsorbed on Cu(111). (uni-marburg.de)
X-ray photoelectron spectroscopy (XPS) is ideally suited to provide information relating to interfacial material properties critical to performance of modern batteries. (pankhursttrust.org)

SEM was used to visually observe the quality of the bonding interface. (uwaterloo.ca)
A research team has used x-ray photoelectron spectroscopy to observe charge motions in light-excited molecules of thiouracil, a modified nucleobase. (spectroscopyeurope.com)

The results show that the surface roughness is comparable to measurements made with more complicated cleaning methods, demonstrating the advantage of our simplified method. (uwaterloo.ca)

Note: This paper is part of the Special Topic Collection: Reproducibility Challenges and Solutions II with a Focus on Surface and Interface Analysis. (aip.org)
He served as an officer of the ASTM Committee E-42 on Surface Analysis and as U.S. Expert on several sub-committees of the ISO Technical Committee 201 on Surface Chemical Analysis. (experts.com)
Development of various devices apparatuses for UHV, surface science, low temperatures, cluster production and analysis. (infim.ro)
Surface and Interface Analysis. (elsevierpure.com)
The response surface methodology with regression analysis is employed for simulating the data obtained, and the optimized parameters are verified in practice. (journaltocs.ac.uk)
Cycling performance and surface analysis of Lithium bis(trifluorometha" by Yue Pan, Guiling Wang et al. (uri.edu)
Ex-situ surface analysis of the cycled electrodes has been conducted via infrared spectroscopy with attenuated total reflectance (IR-ATR) and X-ray photoelectron spectroscopy (XPS). (uri.edu)
X-ray Standing Wave Analysis of Overlayer-induced Substrate Relaxation: The Clean and Bi-covered (110) GaP Surface. (cuny.edu)
Spatially resolved surface analysis is easily achieved using XPS imaging available as standard with AXIS spectrometers. (pankhursttrust.org)
Recent publications in which Kratos AXIS photoelectron spectrometers have conrtibuted to elemental and chemical surface analysis of battery materials. (pankhursttrust.org)

The adhesion of gas or liquid molecules to the surface is known as adsorption. (wikipedia.org)
These huge molecules are further used as organic quantum corrals to achieve and analyze the induced surface state confinements. (uni-marburg.de)

We have investigated the nature of the interaction between samarium (Sm) and pentacene, and the energy level alignment at the resulting interfaces. (princeton.edu)

The focus is on interface modification to improve battery safety, in particular to enhance the onset temperature for thermally activated reactions, which also can have a negative influence on battery performance. (dissertations.se)
We want to know how local surface and interface composition influences device performance, therefore we study individual nanostructure devices during operation, and we follow chemical surface reactions in-situ. (lu.se)
Variation in the salt concentration results in a change in the reduction reactions at the electrode interface and the reversible cycling of the cell. (uri.edu)

In support of many other groups we also use x-ray photo electron spectroscopy to analyze the binding energy of electrons directly. (lu.se)

1 μm) grid electrodes and passivating the surface of copper by using capping layers transparent to the transfer of charge. (warwick.ac.uk)
We recently developed a process which enhances the photocurrent of hematite thin-film electrodes by immobilising light-harvesting proteins such as PC on the surface [ 1 ]. (springeropen.com)

Surface and Coatings Technology , 205 (5), 1557-1563. (polymtl.ca)
Surface and Coatings Technology , 204 (24), 3986-3994. (polymtl.ca)

Using state-of-the-art linear scaling density functional theory (LS-DFT)-based simulations of thousands of atoms (see Fig. 1 ), we elucidate the electronic properties of two paradigmatic systems: the air and oil-water interfaces. (nature.com)
Compared to the bulk of a typical crystalline material, the number of atoms to be probed by any technique is tiny, leading to potential problems with surface specificity (are we measuring the surface or the bulk? (warwick.ac.uk)
By investigating these atoms at different times after the structure was excited with light we can trace the development of electronic and structural changes even in very complex systems or in other words follow the electron through the molecule and over interfaces. (lu.se)

Instead, well-defined single crystal surfaces of catalytically active materials such as platinum are often used as model catalysts. (wikipedia.org)
ACS Applied Materials & Interfaces , 7 (48), 26387-26390. (polymtl.ca)
X-ray studies of solid state materials, surfaces and interfaces. (cuny.edu)
The surface sensitivity of this technique makes it very suitable to investigate the binding and e.g. sensitization of surfaces or catalytic activities of materials. (lu.se)

A summary of the consequences of these modifications on electron injection, charge extraction, electronic mobility, conduction band shift and surface states has been presented. (intechopen.com)

RCA-1 uses a solution of ammonium hydroxide and hydrogen peroxide to clean contaminants off the surface of silicon and enable subsequent bonding. (uwaterloo.ca)

We have evaporated thin films of Ni on different alumina substrates (thin oxide film on metallic Al, polished and scratched sapphire crystals, surface with second phase precipitates) and have analyzed how the interface grows, in situ, using X-ray Photoelectron Spectroscopy. (wright.edu)

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