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Type: Artigo de periódico
Title: Infrared reflection-absorption characterization of TiO2 films on ITO: detection of LO modes
Author: Trasferetti, BC
Davanzo, CU
Zoppi, RA
Abstract: By exploiting the high reflectivity of ITO substrates in the infrared and the detection of longitudinal optical (LO) modes provided by oblique incidence of radiation (Berreman effect), we showed that reflection-absorption experiments in the MID-IR can be successfully performed when thin inorganic oxide films deposited on ITO are used as samples. The samples we used were TiO2 films deposited on ITO by a sol-gel method. After being annealed at different temperatures, the films presented different structures, which could be detected by the IR spectra. Cyclic voltammograms of the samples were also presented and correlated to the IR spectra. Since we expect that other inorganic oxides can yield similar results, this simple, non-destructive and inexpensive technique can be routinely used in an electrochemical laboratory. (C) 2002 Elsevier Science B.V. All rights reserved.
Subject: TiO2
infrared reflection-absorption spectroscopy
Berreman effect
LO modes
Country: EUA
Editor: Elsevier Science Inc
Rights: fechado
Identifier DOI: 10.1016/S1388-2481(02)00278-3
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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