Please use this identifier to cite or link to this item: http://cimav.repositorioinstitucional.mx/jspui/handle/1004/990
Structural characterization of VC0.88 using transmission Extended Electron Energy Loss Fine Structure Spectroscopy
FRANCISCO ESPINOSA MAGAÑA
JOSE ALBERTO DUARTE MOLLER
Acceso Abierto
Sin Derechos Reservados
EELS
VC
We investigate the feasibility to obtain the local structure of the vanadium carbide system (VC0.88) of transmission core ionization electron energy loss spectroscopy. The near edge structure of C K edge and V L23 edge are discussed. The structural parameters were found analyzing the extended fine structure associated to the ionization edge in the core loss window. In order to improve the results, the experimental phase shifts were calculated and applied on each interatomic value. The interatomic distance for V - C bond was 0.20 nm and 0.21 nm which is very close to the expected value of 0.205 nm. A second interatomic distance was found and corresponds to the C – C bond with a numerical value of 0.3 nm and 0.33 nm which is also close to the respective expected value of 0.29 nm. These values were obtained by analyzing the fine structure associated to the carbon K-edge and those associated to the vanadium L23-edge. The interatomic distances are in good agreement to the expected values for VC0.88 when the experimental phase shifts were applied.
2003
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