Electron energy loss parallel

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.

PEELS Parallel (Detection) Electron Energy-Loss Specttscopy... 

Figure 5.39. Illustrating the focussing and dispersive properties of a magnetic prism in an electron energy-loss spectrometer. In a serial spectrometer a slit at D is used to ensure that only electrons of a single energy loss enter the detector. In a parallel spectrometer, a position-sensitive detector is placed at D to collect electrons of all energies in parallel.

PEELS parallel electron energy-loss spectrometry... 

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... 

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... 

The mixture of the two polymers tends to segregate due to low entropy of mixing. The phase segregation has been confirmed by TEM, STEM and PEELS (parallel electron-energy-loss spectra). Care must be taken to prepare the samples of acceptable structure. 

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) ... 

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