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gold-nanocrystals
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Improved electrochromical properties of sol-gel WO3 thin films by doping gold nanocrystals
, Article Thin Solid Films ; Volume 518, Issue 8 , 2010 , Pages 2250-2257 ; 00406090 (ISSN) ; Azimirad, R ; Akhavan, O ; Moshfegh, A. Z ; Sharif University of Technology
2010
Abstract
In this investigation, the effect of gold nanocrystals on the electrochromical properties of sol-gel Au doped WO3 thin films has been studied. The Au-WO3 thin films were dip-coated on both glass and indium tin oxide coated conducting glass substrates with various gold concentrations of 0, 3.2 and 6.4 mol%. Optical properties of the samples were studied by UV-visible spectrophotometry in a range of 300-1100 nm. The optical density spectra of the films showed the formation of gold nanoparticles in the films. The optical bandgap energy of Au-WO3 films decreased with increasing the Au concentration. Crystalline structure of the doped films was investigated by X-ray diffractometry, which...
Visible photoenhanced current-voltage characteristics of Au : TTT iO2 nanocomposite thin films as photoanodes
, Article Journal of Physics D: Applied Physics ; Volume 43, Issue 10 , 2010 ; 00223727 (ISSN) ; Amiri, M ; Moshfegh, A. Z ; Sharif University of Technology
Abstract
In this investigation, the effect of annealing temperature and concentration of gold nanoparticles on the photoelectrochemical properties of sol-gel deposited Au : TiO2 nanocomposite thin films is studied. Various gold concentrations have been added to the TiO2 thin films and their properties are compared. All the deposited samples are annealed at different temperatures. The optical density spectra of the films show the formation of gold nanoparticles in the films. The optical bandgap energy of the Au : TiO2 films decreases with increasing Au concentration. The crystalline structure of the nanocomposite films is studied by x-ray diffractometry indicating the formation of gold nanocrystals in...