Loading...

Formation of gold nanoparticles in heat-treated reactive co-sputtered Au-SiO 2 thin films

Sangpour, P ; Sharif University of Technology | 2007

383 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.apsusc.2007.07.095
  3. Publisher: Elsevier , 2007
  4. Abstract:
  5. In this work, formation of gold nanoparticles in radio frequency (RF) reactive magnetron co-sputtered Au-SiO 2 thin films post annealed at different temperatures in Ar + H 2 atmosphere has been investigated. Optical, surface topography, chemical state and crystalline properties of the prepared films were analyzed by using UV-visible spectrophotometry, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and X-ray diffractometry (XRD) techniques, respectively. Optical absorption spectrum of the Au-SiO 2 thin films annealed at 800 °C showed one surface plasmon resonance (SPR) absorption peak located at 520 nm relating to gold nanoparticles. According to XPS analysis, it was found that the gold nanoparticles had a tendency to accumulate on surface of the heat-treated films in the metallic state. AFM images showed that the nanoparticles were uniformly distributed on the film surface with grain size of about 30 nm. Using XRD analysis average crystalline size of the Au particles was estimated to about 20 nm. © 2007
  6. Keywords:
  7. Annealing ; Gold ; Magnetron sputtering ; Silica ; Surface plasmon resonance ; Surface topography ; Thin films ; X ray photoelectron spectroscopy ; Gold nanoparticles ; Heat-treated films ; Magnetron co-sputtered ; Nanoparticles
  8. Source: Applied Surface Science ; Volume 254, Issue 1 SPEC. ISS , 2007 , Pages 286-290 ; 01694332 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0169433207010100