Ultra-violet photoelectron

The UPS technique (ultra violet photoelectron spectroscopy), by measuring the cutoff energy of secondary electrons.56,57... 

Significant observations regarding the origin of NEMCA have been also made using Ultra-violet Photoelectron Spectroscopy (UPS) with Pt and Ag electrodes deposited on YSZ. In this case the work function of the electrode can be determined from the cutoff energy of secondary electrons (Fig. 5.43).24,68 As shown in Fig. 5.8b the change in the work function of the gas-exposed Ag surface is very close to the imposed electrode potential change AUwr. 

Barrie, A. In "Handbook of X-ray and Ultra-Violet Photoelectron Spectroscopy", Briggs, D., Ed. Heyden London, p. 116. 

ESCA UPS SIMS STM IR UV electron spectroscopy for chemical analysis ultra-violet photoelectron spectroscopy secondary ion mass spectroscopy scanning tunneling microscopy infra-red ultra-violet... 

In the case of surface sites incorporating atoms, the valence states and their eventual variation in the course of the reaction can be studied by spectroscopic methods such as electron paramagnetic resonance (EP.R), XPS, ultra-violet photoelectron (UPS), IR, and near-edge X-ray (XANES) spectroscopies (Near-edge X-ray spectroscopy is abbreviated in some parts of the world, particularly in USA, as NEXASS). 

Systems" in Handbook of X-ray and Ultra-Violet Photoelectron Spectroscopy, Ed. D. Briggs, Heydon Son Ltd., London 1977. 

Fig. 5 shows the density of states (DOS) in clusters (a)-(e) and an experimental ultra-violet photoelectron spectrum (UPS) for Si02 glass reported by Distefano et al. [22] The energy scale is normalized to the Fermi energy and then shifted by + 3 eV in order to compare with experimental UPS. 

UPS Ultraviolet photoelectron spectroscopy Light (ultra- violet) Photoelectron... 

Tompkins (1978) concentrates on the fundamental and experimental aspects of the chemisorption of gases on metals. The book covers techniques for the preparation and maintenance of clean metal surfaces, the basic principles of the adsorption process, thermal accommodation and molecular beam scattering, desorption phenomena, adsorption isotherms, heats of chemisorption, thermodynamics of chemisorption, statistical thermodynamics of adsorption, electronic theory of metals, electronic theory of metal surfaces, perturbation of surface electronic properties by chemisorption, low energy electron diffraction (LEED), infra-red spectroscopy of chemisorbed molecules, field emmission microscopy, field ion microscopy, mobility of species, electron impact auger spectroscopy. X-ray and ultra-violet photoelectron spectroscopy, ion neutralization spectroscopy, electron energy loss spectroscopy, appearance potential spectroscopy, electronic properties of adsorbed layers. 

While molecular and dissociated CO have similar X-ray photoelectron spectroscopy spectra, 0(ls) at 531 eV and C(ls) at 285 eV [245, 427, 431], the ultra violet photoelectron spectroscopy [245, 427] and laser Raman [432] spectra are different. 

Ultra violet photoelectron spectroscopy N(ls) peaks are found at — 12 and — 8 eV [462]. At 85 K X-ray photoelectron spectroscopy N(Is) peaks are found at 405.9 and 401.2 eV [462, 463]. High resolution electron energy loss spectroscopy shows a N-N stretch in yN2 at 2100 cm [231]. For N2 the work function decreases linearly with the coverage up to saturation [22]. 

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