Authors: F Vaz F Macedo R T Faria M Torrell A Cavaleiro K H Junge B K Bein
Publish Date: 2013/01/23
Volume: 34, Issue: 8-9, Pages: 1597-1605
Abstract
In this work Autext TiO 2 thin films prepared by dc reactive magnetron sputtering were studied The thin films with an amount of gold of about 15 at were subsequently annealed at constant temperatures between 200circ text C and 800circ text C are here analyzed with respect to their thermal behavior The changes of the material properties with increasing annealing temperature from initially amorphous to a gradually increasing crystalline structure and the formation of nanoclusters and gold nanoparticles of increasing size from 5 nm to 17 nm are analyzed with the help of the phase lag signals measured by modulated IR radiometry The obtained results seem to indicate the formation of strong subsurface heat sources which can be explained with the help of the surface plasmon resonance effect and which can be described by the theory of semitransparent coatings with effects of semitransparency both in the visible and the infrared spectrumThis research has been sponsored by FEDER funds—program COMPETEPrograma Operacional Factores de Competitividade and by Portuguese national funds through FCTFundação para a Ciência e a Tecnologia under the project PTDC/CTM/70037/2006 RT Faria Jr thanks the Brazilian agency “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—CAPES” for financial support
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