Ultraviolet photoemission spectroscopy (UPS) has been used to investigate matrix-isolated metal atoms, dimers and small clusters. Such systems are difficult to study by photoemission because of charging effects and the unfavourably low metal-to-matrix ratio, required in matrix isolation, which causes ...
Ultravioletphotoemissionspectroscopy(UPS)紫外光电子能谱 Photoemissionspectroscopy Content Nomenclature Instrumentation UVsourceSynchrotronradiation PrinciplesUVPhotoemissionanalysis Angle-integratedUPSAngle-resolvedUPS Nomenclature Nomenclature •X-rayphotoelectronspectroscopy,XPSisalsoknow...
Ultraviolet Photoelectron Spectroscopy (UPS) UV light ( hn = 5 to 100 eV) to excite photoelectron. From an analysis of the kinetic energy and ..
Photoemission(UPS)theory Atcertaindirection(determinedbyqandf)thewavevectorofemittedelectrons(freeelectronsintothevacuum)withkineticenergyEkinis:Kex=(2mEkin/h)1/2 Howtodetermineitsorigininthesolid?Thefirststep Theopticalexcitationofanelectroninthefirststepissimplydescribedby“goldenrule”Thetransitionhappened...
Kera, K. Kanai, in Fundamental Electronic Structure of Organic Solids and Their Interfaces by Photoemission Spectroscopy and Related Methods, ed. by N. Koch, N. Ueno, A.T.S. Wee. The Molecule-Metal Interface, Chap. 7 (Wiley, 2013, Weinheim), p. 179 Y. Huang, R. Wang, T.C. Niu...
Application of Ultraviolet Photoelectron Spectroscopy (UPS) in the Surface Characterisation of Polycrystalline Oxides. II. Depth Analysis of the Reduction degree in the Surface Region of Partially Reduced V2O5 The surface of partially reduced V2O5 has been studied by photoemission techniques of different ...
Photoemission(UPS)theory Atcertaindirection(determinedbyqandf)thewavevectorofemittedelectrons(freeelectronsintothevacuum)withkineticenergyEkinis:Kex=(2mEkin/h)1/2 Howtodetermineitsorigininthesolid?Thefirststep Theopticalexcitationofanelectroninthefirststepissimplydescribedby“goldenrule”Thetransitionhappened...
Ultraviolet photoemission spectroscopy (UPS) spectra of doped, intermediate doped and reduced polypyrrole exhibits two characteristic shoulders theoretically assigned to 2b 1 and 1a 2 π-orbitals. A decrease of the density of states (DOS) at the 2b 1 level and an increase of the DOS at 1a 2 ...
ultraviolet photoemission spectroscopyAlso found in: Encyclopedia. Related to ultraviolet photoemission spectroscopy: Photoelectron spectroscopyultraviolet photoemission spectroscopy n. A spectroscopic technique that determines the band structure and binding energy of electrons in small groups of molecules by ...
“information depth” from which > 99% of a photoemission signal originates conventionally being defined at 3 mean free path lengths from the surface, which in XPS is often quoted as 10 nm. This is an approximation as the IMFP of an electron is determined by the material properties of the...