OrganismsChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPhenomena and ProcessesDisciplines and OccupationsTechnology, Industry, Agriculture
Photoelectron SpectroscopySurface PropertiesSpectrometry, X-Ray EmissionElectron Probe MicroanalysisTitaniumSpectrum AnalysisSpectrometry, Mass, Secondary IonCorrosionSilanesAdsorptionPhotochemical ProcessesWettabilityMicroscopy, Atomic ForceDiamondMagnetic Resonance SpectroscopyGoldQuartz Crystal Microbalance TechniquesAlloysMaterials TestingCoated Materials, BiocompatibleElectronsElectrochemistryImmobilized ProteinsPolymersOxidesMicroscopy, Electron, ScanningDental AlloysSpectroscopy, Fourier Transform InfraredSilicon DioxideX-RaysBiocompatible MaterialsPolyurethanesNanotechnologyDental MaterialsDipodomysSulfhydryl CompoundsMethacrylatesCarbonMolecular StructureNanoparticlesPolyethylene GlycolsWaterParticle SizeSpectroscopy, Near-InfraredQuantum TheoryPhotochemistry
Ultraviolet photoelectroMicroscopyRamanDiffractionPhotoemissionIonsCoincidenceKinetic energyAnalysesSituFluorescenceMolecularESCASpectraSynchrotronSpectrumDefectsEnergiesInterfacialMoleculesInvestigateElectrodesVirtuallyAnalysisPotentialThermal expansionTransitionTemperatureMaterialsSolidShortOriginConcentrationDevelopBandSamplesSurface chargePositive
Ultraviolet photoelectro6
  • 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 photoelectron spectroscopy (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)
  • Turner referred to the method as "molecular photoelectron spectroscopy", now usually "ultraviolet photoelectron spectroscopy" or UPS. (wikipedia.org)
  • Ultraviolet Photoelectron Spectroscopy of Molybdenum and Molybdenum Monoxide Anions. (educaplus.org)
  • 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)
  • Rutherford backscattering spectrometry (RBS), elastic recoil detection (ERD), and XPS were employed to determine the chemical composition of the produced films, while XPS and in situ ultraviolet photoelectron spectroscopy (UPS) were employed to investigate the electronic structure of film surfaces. (elsevierpure.com)
Microscopy10
  • Scanning tunneling microscopy / spectroscopy (STM/STS). (infim.ro)
  • In addition, characterization studies were conducted with scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD) to better understand the mechanisms of the aging processes on Ag0Z and Ag0-aerogel by observing the chemical and physical changes through aging processes. (syr.edu)
  • X-ray diffraction, X-ray photoelectron spectroscopy, and optical microscopy analyses were carried out to determine the effect of polyvinyl chloride modification on structural properties. (utb.cz)
  • Transmission electron microscopy (TEM) using gold-labeled components and X-ray photoelectron spectroscopy (XPS) demonstrated the spatial organization of siRNA molecules in the particle core, surrounded by a layer of HAS. (bgu.ac.il)
  • Characterization of the materials with Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and microstructure analysis by scanning and transmission electron microscopy (TEM) revealed the survivability of the SWCNTs and the nature of the matrix-filler interface. (csircentral.net)
  • A porous sodium titanate surface was observed by scanning electron microscopy and X-ray photoelectron spectroscopy analyses confirmed the presence of TESPSA on the titanium samples (8.4% for Ti-N-TSP). (upc.edu)
  • The coatings were further characterized by X-ray photoelectron spectroscopy, scanning electron microscopy, and nanoindentation in order to study their elemental composition, morphology, and hardness, respectively. (aip.org)
  • The surface properties of untreated and differently modified cellulose samples were analyzed by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), in vitro silver release, and hydrophilicity measurements. (onacademic.com)
  • The X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy results demonstrate that silicon polyurethane membrane could be coated onto the surface of hydrolyzed polyester fabric and form a micro-/nano-scaled hierarchical structure. (cip.com.cn)
  • Related properties of these oxide films were studied by open-circuit potential, current density detected at open-circuit potential, the electrochemical impedance spectroscopy, transmission electron microscopy, Auger spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy. (tmu.edu.tw)
Raman6
  • This work aimed at preparing the electrode composite LiFePO 4 @carbon by hydrothermal and the calcination process was conducted at 600, 700, and 800°C. The structure and morphology were determined by X-ray diffraction (XRD), SEM, Raman spectroscopy, X-ray photon spectroscopy (XPS), and thermal analysis. (hindawi.com)
  • The results of Raman spectroscopy and XPS confirmed the pure olivine phase as well as the successful carbon coating on the surface of olivines' powders. (hindawi.com)
  • The electrochemical performances of LiFePO 4 @carbon were related to crystalline, carbon content as well as quality, and electronic-ionic conductivity which were characterized by powder X-ray diffraction, Raman spectroscopy, and cyclic voltammetry. (hindawi.com)
  • The reduction and functionalization of GO were examined by Fourier transform infrared (FT-IR), Raman and X-ray photoelectron spectroscopy (XPS) techniques. (csircentral.net)
  • Researchers say the surface enhanced Raman spectroscopy sensor combines accuracy levels approaching that of PCR testing with the speed of rapid antigen tests, and could be used for mass testing at airports, schools and hospitals. (spectroscopyeurope.com)
  • Researchers at the University of Illinois Chicago have used graphene and Raman spectroscopy to detect the SARS-CoV-2 virus in laboratory experiments. (spectroscopyeurope.com)
Diffraction2
  • 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)
  • Our recent studies of the PrGaO 3 structure using high-resolution powder diffraction techniques and synchrotron radiation revealed negative thermal expansion in the temperature range 12 - 80 K. Nevertheless, no negative expansion could be seen in isostructural LaGaO 3 , CeGaO 3 and NdGaO 3 . (science24.com)
Photoemission3
  • The method was later extended to the study of solid surfaces where it is usually described as photoemission spectroscopy (PES). (wikipedia.org)
  • 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)
  • This conclusion is supported by results from photoelectron spectroscopy (ultraviolet photoemission spectroscopy, inverse photoelectron spectroscopy, and x-ray photoemission spectroscopy) for the molecule-Si band alignment at equilibrium, which clearly indicate that the energy difference between the Fermi level and the LUMO is much smaller than that between the Fermi level and the highest occupied molecular orbital (HOMO). (princeton.edu)
Ions2
  • In this report, we assert that the negative charge at extended hydrophobic interfaces does not require the binding of \({{\rm{OH}}}^{-}\) ions. (nature.com)
  • Using negative ions as a means to access the intermediates, our research involves the use of mass spectrometry, gas phase chemistry, and photoelectron spectroscopy to determine their thermochemical and structural properties. (purdue.edu)
Coincidence1
  • Coincidence spectroscopy: photoelectron-photoion-photoion coincidences (PEPIPICO), zero electron kinetic energy (ZEKE) spectroscopy, threshold electron spectroscopy. (infim.ro)
Kinetic energy2
  • 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 ones with greater kinetic energy appear at a larger radius relative to the center of the detector and we can thus reconstruct the photoelectron kinetic energy distribution. (yale.edu)
Analyses1
  • Transform Infrared Spectroscopy), and XPS (X-ray Photoelectron Spectroscopy) analyses were adopted to study the interaction mechanisms between the depressants and pyrite samples. (bham.ac.uk)
Situ2
  • Here, we develop an in situ absorbance spectroscopy approach to quantify interfacial energetics of 2D semiconductor/electrolyte interfaces using a minimal many-body model. (rsc.org)
  • In situ UPS measurements indicated that as-deposited c-BN films exhibited a negative electron affinity (NEA). (elsevierpure.com)
Fluorescence1
  • 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)
Molecular2
  • The photoelectron spectrum of a molecule contains a series of peaks each corresponding to one valence-region molecular orbital energy level. (wikipedia.org)
  • Based on negative differential resistance in an analogous semiconductor-inorganic insulator/metal junction we suggest that for both p ++ - and n ++ -type junctions, the energy difference between the Fermi level and lowest unoccupied molecular orbital (LUMO), i.e., electron tunneling, controls charge transport. (princeton.edu)
ESCA1
  • 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)
Spectra1
  • Surface composition (normalized) obtained from the survey spectra of (a) C22 and (b) BC1 alloy after polarization at, 0 V and 0.5 V (positive scan) and 0 V and -0.4 V (negative scan) at pH = 7 solution. (xpsfitting.com)
Synchrotron1
  • Work at the Diamond synchrotron has found a way to help reduce false-negative results in lateral flow tests by a simple modification. (spectroscopyeurope.com)
Spectrum1
  • When the applied voltage was positive, the IET spectrum did not change, whereas when it was negative, the IET spectrum changed-the asymmetric peak became symmetric. (cambridge.org)
Defects2
  • Small amounts of charge transfer along hydrogen bonds and asymmetries in the hydrogen bond network due to topological defects can lead to the accumulation of negative surface charge at both interfaces. (nature.com)
  • Both systems are characterized by a regime of significant negative charge, that is primarily modulated by how charge transfer changes for different water defects 24 . (nature.com)
Energies2
  • Prior to 1960, virtually all measurements of photoelectron kinetic energies were for electrons emitted from metals and other solid surfaces. (wikipedia.org)
  • The early experiments used monochromatized radiation from a hydrogen discharge and a retarding potential analyzer to measure the photoelectron energies. (wikipedia.org)
Interfacial1
  • Furthermore, the negative charge centers in the interfacial layer had dual functions in both the field passivation and the tunneling processes. (hindawi.com)
Molecules1
  • Utilizing anion photoelectron spectroscopy, we are able to quickly determine the electron affinities and measure the vibrational frequencies of neutral molecules. (yale.edu)
Investigate2
  • Our research involves the use of mass spectrometry and ion spectroscopy to investigate the mechanisms of chemical reactions in the gas phase. (purdue.edu)
  • 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)
Electrodes1
  • An asymmetric supercapacitor (ASC) cell was designed with SAC-RGO@Ni and thermally reduced GO (TRGO) as positive and negative electrodes, respectively. (csircentral.net)
Virtually1
  • Photoluminescence spectroscopy of the GaN nanowires shows excitonic transitions virtually identical in spectral position, line width, and decay time to those of state-of-the-art GaN nanowires grown on Si. (baldengineering.com)
Analysis2
Potential4
  • The electrokinetic experiments of both air and oil droplets paint a very similar picture despite having rather disparate chemistries namely, that the zeta potential ( \(\zeta\) ) vanishes under acidic conditions and that with increasing pH, it becomes increasingly negative showing that these interfaces retain a negative charge at neutral pH 3 . (nature.com)
  • The Zeta potential showed a steady increase of negative values with the corn starch concentration increasing, whereas the Zeta potential increased steadily from negative values to ~20 mV with the PAC concentration increasing due to the adsorption of Al(OH)2+, Al(OH)2+, Al3(OH)45+, and Al2(OH)24+ on the surface of pyrite. (bham.ac.uk)
  • Although many efforts have been devoted to the fabrication of oil/water separation materials, their practical applications are still hindered by their weak durability, poor chemical tolerance, environmental resistance, and potential negative impact on health and the environment. (cip.com.cn)
  • Surface characterizations showed that a stable negative current density at open-circuit potential and a significant lower potential were found for the wire surface passivated with AO than for the surface passivated with PO. (tmu.edu.tw)
Thermal expansion3
  • The negative thermal expansion of PrGaO 3 seems to be related to the violation of this balance caused by interactions between octahedral rotational modes and Pr-ion excitations. (science24.com)
  • Negative thermal expansion has also been observed in Pr-containing solid solutions (La 0.19 Pr 0.81 GaO 3 , La 0.4 Pr 0.6 GaO 3 ) [Aleksiyko et al]. (science24.com)
  • We did, however, not observed traces of negative expansion, which indicates possible electronic effects involved in the nature of such negative thermal expansion of Pr-containing rare-earth gallates. (science24.com)
Transition1
Temperature1
  • 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)
Materials1
  • High energy conversion efficiency is expected in these composites due to the possession of dual functionalities like high thermal conductivity as well as high negative permittivity, which should ensure the application of these materials in wave filter, cloaking device, supercapacitors, and wireless communication. (csircentral.net)
Solid1
  • Considering the structure of RGaO 3 (R=La-Nd) and its solid solutions R 1-x R x GaO 3 allows us to conclude that many of such compositions are promising candidates for negative expansion at low temperatures. (science24.com)
Short2
  • It is particularly sensitive to the surface region (to 10 nm depth), due to the short range of the emitted photoelectrons (compared to X-rays). (wikipedia.org)
  • The photoelectrons are extracted perpendicular to the anion beam using three electrostatic lenses and accelerated toward a position-sensitive detector and the end of a short flight tube. (yale.edu)
Origin1
  • The origin of the apparent negative charge at hydrophobic-water interfaces has fueled debates in the physical chemistry community for decades. (nature.com)
Concentration1
  • Increase in the negative permittivity value with SWCNT concentration (1, 3, and 6 vol %) in the composites had been observed at low frequencies. (csircentral.net)
Develop1
  • Discovery of plasmon resonance and negative permittivity in carbon allotropes at much lower frequencies than those of metals has evoked interest to develop random metacomposites by suitable means of addition of these dispersoids in an overall dielectric matrix. (csircentral.net)
Band1
  • Be 5 C 2 monolayer is a gapless semiconductor with a Dirac-like point in the band structure and also has an unusual negative Poisson's ratio. (nature.com)
Samples1
  • Antimicrobial activity was proven against all Gram negative bacteria, while the Gram positive bacteria survive the as-prepared samples. (onacademic.com)
Surface charge1
  • The NPs have an average size of 130 nm and a mild (- 10 mV) negative surface charge. (bgu.ac.il)
Positive2
  • These detectors have some important limitations such as fast-signal distortion (low-pass filtering), mutually exclusive positive or negative modes, dead times, requirement of triggering and more. (empa.ch)
  • Antibacterial activity against gram-negative and gram-positive bacteria was determined by agar diffusion test. (utb.cz)