Electron energy-loss spectroscopy of V2O5 nanofibers synthesized by electro-spinning |
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| Affiliation: | 1. Centro de Investigación en Materiales Avanzados, S.C. (CIMAV), Miguel de Cervantes 120, C.P. 31136, Chihuahua, Chih, Mexico;2. Instituto Regional de Investigación Científica Aplicada (IRICA), Departamento de Física Aplicada, Universidad de Castilla-La Mancha, 13071, Ciudad Real, Spain;1. Department of Applied Physics, Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072, People''s Republic of China;2. College of Chemical Engineering, North China University of Science and Technology, Tangshan 063009, People''s Republic of China;1. Konotop Institute, Sumy State University, 24, Myru Ave., Konotop, UA, 41600, Ukraine;2. Sumy State University, 2, Rimsky-Korsakov Str., Sumy, UA, 40007, Ukraine;1. M.V. Lomonosov Moscow State University, Moscow 119991 Russian Federation;2. Yuri Gagarin State Technical University of Saratov, Saratov 410054 Russian Federation;1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China;2. Energy Conversion R&D Center, Central Academy of Dongfang Electric Corporation, Chengdu 611731, PR China |
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| Abstract: | 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 calculations (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 nanoparticles 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. |
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| Keywords: | EELS Dielectric function Nanofibers |
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