Título

Electron energy-loss spectroscopy of V2O5 nanofibers synthesized by electro-spinning

Autor

MARTHA TERESITA OCHOA LARA

FRANCISCO ESPINOSA MAGAÑA

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/about/cc0/

Materias

EELS - (AB INITIO) Dielectric function - (V2O5) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) FÍSICA - (CTI) OTRAS ESPECIALIDADES FÍSICAS - (CTI) OTRAS - (CTI)

Resumen o descripción

The dielectric properties of V2O5 nanofibers, synthesized by the electrospinning method, are studied by analyzing the low-loss region of the electron energy loss spectroscopy (EELS) in a transmission electron microscope. A comparison of experimental EELS spectra and ab initio density-functional theory calcula-tions (WIEN2k code) within the Generalized Gradient Approximation (GGA) is presented, having found an excellent agreement between them. Although the experimental EELS has been acquired for the nanopar-ticles composing the fibers, and numerical calculations were carried out for bulk material, agreement between experimental and calculated results shows that no difference exists between the electronic structure in calculated bulk material and the nanoparticles. Furthermore, our results from EELS confirm that we accomplished the expected crystalline phase. The origins of interband transitions are identified in the electronic band structure by calculating the partial imaginary part of the dielectric function and the partial density of states.

Fecha de publicación

2013

Tipo de publicación

Artículo

Versión de la publicación

Versión enviada

Recurso de información

http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1166

Formato

application/pdf

Idioma

Inglés

Repositorio Orígen

Fuente de Objetos Científicos Open Access

Descargas

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