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Parallel electron energy loss spectroscopy

When the incident electron beam passes through the thin foil it ionizes atoms within the foil. The ionized atoms then decay with the emission of x-rays, and the energy of an emitted x-ray is characteristic of the atom from which it came. Detection of these x-rays with a solid-state detector allows the composition ol the volume of the thin foil through which the beam has passed to be determined. [Pg.474]

PEDOT PEELS PEG PEG-Si PEI PEO PEP PER PET PG PG-zb Ph phim PHMA PI pia PIXIES poly-(3,4-ethylenedioxythiophene) parallel electron energy loss spectroscopy poly(ethylene glycol) 2-[methoxypoly(ethyleneoxy)propyl]trimethoxysilane poly(ethylene imine) poly(ethylene oxide) poly(ethylene-aZf-propylene) photoelectrorheological (effect) positron emission tomography adaptor protein G Fc domain of PG phenyl benzimidazolate poly(w-hexyl methacrylate) polyisoprene V-4-pyridyl isonicotinamide protein imprinted xerogels with integrated emission sites... [Pg.813]

PEELS (parallel electron energy loss spectroscopy) is a method whereby electron energy loss spectra can be acquired in a transmission electron microscope with great rapidity. This is accomplished by the use of a multi-element solid-state detector. Typically, PEELS is used to determine the composition of the sample under study and does not have sufficient energy resolution to provide EXELFS data. Improvements in detector technology may change this. [Pg.530]

Metal-ceramic interfaces are essential for the overall mechanical properties of ceramic (CMC) and metal matrix ceramic composites (MMC). The combined use of parallel electron energy loss spectroscopy (TEM/PEELS) and HREM imaging allows the direct determination of the arrangement of atoms along the interfaces from the Fe and/or Ni/Al20a composites processed by hot pressing [21]. [Pg.70]

Figure Bl.25.12. Excitation mechanisms in electron energy loss spectroscopy for a simple adsorbate system Dipole scattering excites only the vibration perpendicular to the surface (v ) in which a dipole moment nonnal to the surface changes the electron wave is reflected by the surface into the specular direction. Impact scattering excites also the bending mode v- in which the atom moves parallel to the surface electrons are scattered over a wide range of angles. The EELS spectra show the higlily intense elastic peak and the relatively weak loss peaks. Off-specular loss peaks are in general one to two orders of magnitude weaker than specular loss peaks. Figure Bl.25.12. Excitation mechanisms in electron energy loss spectroscopy for a simple adsorbate system Dipole scattering excites only the vibration perpendicular to the surface (v ) in which a dipole moment nonnal to the surface changes the electron wave is reflected by the surface into the specular direction. Impact scattering excites also the bending mode v- in which the atom moves parallel to the surface electrons are scattered over a wide range of angles. The EELS spectra show the higlily intense elastic peak and the relatively weak loss peaks. Off-specular loss peaks are in general one to two orders of magnitude weaker than specular loss peaks.
Welipitiya etal. [132] have studied adsorption and desorption of ferrocene on Ag(lOO), applying photoemission and thermal desorption. The initially adsorbed surface species closely resembled that of molecular ferrocene. The molecule was adsorbed with the cyclopentadienyl ring ligands parallel to the surface. Wood-bridge etal. [133] have performed the high-resolution electron energy loss spectroscopy (HREELS) andXPS studies of ferrocene on Ag(lOO). Researchers from the... [Pg.928]

The density inside the dilatation bands was measured using electron energy loss spectroscopy (EELS) with a Gatan 666 parallel EELS (PEELS), which was attached to the TEM. An accelerating voltage of 100 kV was used. The density of the dilatation band was calculated using the following equation (22) ... [Pg.172]

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