Structural phototransformation of WO3 thin films detected by photoacoustic analysis
Por:
Pacheco, AP, de Oca, COM, Castaneda-Guzman, R, Garcia, AE
Publicada:
15 nov 2012
Categoría:
Surfaces, Coatings and Films
Resumen:
The photoacoustic technique (PA) was used to detect the phase transformation from amorphous to crystalline state of tungsten oxide (WO3) thin films induced by UV pulsed laser radiation at low energy (<1.5 mJ). The evolution of photoacoustic signal was studied by a correlation analysis, comparing successive signals at fluences ranging from 0 to 20 mJ/cm(2). In this interval, it was possible to observe structural changes and the ablation threshold in films due to incident laser fluence effect. Thin films of WO3 were deposited by DC reactive magnetron sputtering over glass substrates at different deposition times. The results obtained by correlation analysis were compared with Raman spectroscopy data. (C) 2012 Elsevier B. V. All rights reserved.
Filiaciones:
Pacheco, AP:
Univ Nacl Autonoma Mexico, Lab Fotofis & Peliculas Delgadas CCADET, Mexico City 04510, DF, Mexico
de Oca, COM:
Univ Nacl Autonoma Mexico, Lab Fotofis & Peliculas Delgadas CCADET, Mexico City 04510, DF, Mexico
Castaneda-Guzman, R:
Univ Nacl Autonoma Mexico, Lab Fotofis & Peliculas Delgadas CCADET, Mexico City 04510, DF, Mexico
Garcia, AE:
Univ Nacl Autonoma Mexico, Lab Fotofis & Peliculas Delgadas CCADET, Mexico City 04510, DF, Mexico
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