Infrared and raman spectra of nanoporous SiO2 matrix filled with BaTiO3 nanoparticles

• Autores: Lopez J.A.R., Silva L.M.A., Emelianov N.A., Korotkov L.N.
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Consejo Nacional de Ciencia Tecnología e Innovación
• Repositorio: CONCYTEC-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.concytec.gob.pe:20.500.12390/2633
• Enlace del recurso: https://hdl.handle.net/20.500.12390/2633; https://doi.org/10.4028/www.scientific.net/KEM.834.110
• Nivel de acceso: acceso abierto
• Materia: SiO2 porous matrix; BaTiO3 nanoparticles; Infrared spectra; Nanocomposite; Raman spectra; http://purl.org/pe-repo/ocde/ford#2.05.01

Nanocomposite in the form of a porous matrix SiO2 with average pore size of 320 nm filled with barium titanate nanoparticles in paraelectric cubic phase was obtained. Shift of the stretching vibration of Si-O-Si to higher frequencies caused by increased strengthening of the network in the matrices has been observed. Also demonstrated that decrease in the intensity of the absorption relating to Si-O(H) stretching vibration relative to Si-O(-Si) stretching vibration. Raman scattering spectra demonstrate the presence of both a cubic and a tetragonal ferroelectric crystalline phase in the filler nanoparticles. Thus, the mechanical deformation of nanoparticles in the pores of the matrix can lead to a change in the crystalline phase of the filler. © 2020 Trans Tech Publications Ltd, Switzerland.