AES—See Auger electron spectroscopy

AES See Auger electron spectroscopy, aluminium See aluminum at. wt See atomic weight. 

Electronic spectra of surfaces can give information about what species are present and their valence states. X-ray photoelectron spectroscopy (XPS) and its variant, ESC A, are commonly used. Figure VIII-11 shows the application to an A1 surface and Fig. XVIII-6, to the more complicated case of Mo supported on TiOi [37] Fig. XVIII-7 shows the detection of photochemically produced Br atoms on Pt(lll) [38]. Other spectroscopies that bear on the chemical state of adsorbed species include (see Table VIII-1) photoelectron spectroscopy (PES) [39-41], angle resolved PES or ARPES [42], and Auger electron spectroscopy (AES) [43-47]. Spectroscopic detection of adsorbed hydrogen is difficult, and... 

Auger electron spectroscopy (AES), 76 495 24 84-87, 94-97. See also AES instrumentation archaeological materials, 5 744 quantitative, 24 98 Auger sensitivity factors, 24 96 Auger spectra, 24 95-97, 98 Auger transitions, 24 95 Augite, in coal, 6 718 Au(III) halides, 72 706. See also Gold(III) entries... 

Thus the electrons used in LEED are usually in the range 10 to 300 eV, lower in energy by one to two orders of magnitude than those used in scanning electron microscopy (SEM Chapter 1) and Auger electron spectroscopy (AES see Section 9. lb.2). Davisson (Nobel Prize, 1937), working with a series of collaborators, is generally credited with the first application of electrons to diffraction studies. 

Its optoelectronic properties are also unpredictable by extrapolation from its antecedents in Group 11. Its electrical resistivity is greater than that of silver (see Table 2.1), and its colour more closely resembles that of copper its optical absorption in the visible region of the spectrum is due to the relativistic lowering of the gap between the 5d band and the Fermi level, without which it would be white like silver and have the same propensity to tarnish and corrode.27 Polycrystalline gold surfaces have been characterised by Auger electron spectroscopy (AES). 

Microanalytical methods are used to move further down in the characterization scale. X-ray photoelectron spectroscopy (XPS or ESCA), (see Barr) Auger electron spectroscopy (AES), and secondary ion mass spectroscopy (SIMS) as presented by Leta for imaging FCC catalysts, are surface analysis techniques providing chemical analy-... 

Angle-resolved Auger electron spectroscopy ARAES Auger electrons are detected as a function of angle to provide information on the spatial distribution or environment of the excited atoms (see AES). Composition... 

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