Microstructure and optical characterization of Au/SiO2 nano-composite multilayer films

Yun Zhang, Bo Ping Zhang, Li Shi Jiao, Xiang Yang Li, Hiroshi Masumoto, Takashi Goto

Research output: Contribution to journalArticlepeer-review

Abstract

Au/SiO2 nano-composite multilayer thin films with different thickness were prepared on a quartz substrate by magnetron plasma sputtering. The microstructure, morphology and optical properties of the films were investigated by using TEM and optical absorption spectra. [Au/SiO 2]×5 and [Au/SiO2] × 11 multilayer thin films have well-defined interface. The thickness of the multilayer was 60nm and 130nm for the thin films with 5 and 11 layers, respectively. The optical absorption peaks due to the surface plasma resonance appeared at a wavelength of 560 nm for the both [Au/SiO2]×5 and [Au/SiO2]×11 thin films. The intensity of the absorption peak increased with increasing numbers of deposition layers. The optical absorption spectra of Au/SiO2 multilayer thin films are well agreement with the theoretical optical absorption spectra calculated from rewritten Maxwell-Garnett effective medium theory.

Original languageEnglish
Pages (from-to)2575-2578
Number of pages4
JournalKey Engineering Materials
Volume336-338 III
DOIs
Publication statusPublished - 2007 Jan 1

Keywords

  • Au/SiO
  • Maxwell-Garnett effective medium theory
  • Optical absorption spectra

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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