Optical Properties of Au Nanoparticle Dispersed TiO2 Films Prepared by Laser Ablation

Akihiko Ito, Hiroshi Masumoto, Takashi Goto

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12 Citations (Scopus)


Au-nanoparticle dispersed TiO2 (Au/TiO2) films were prepared by laser ablation using Au-powder mixed TiO2 (rutile) sintered targets. The Au content in the films was controlled in the range from 3 to 37 mol% by changing the target composition. As-deposited TiO2 matrix of the films was amorphous-like anatase, and changed to a well-crystallized anatase phase after heat treatments at 1173 K. The diameters of Au nanoparticles increased from 1.5 to 4.1 nm with increasing the heat-treatment temperature from 573 to 1173 K. Optical absorption spectra by surface plasmon resonance from Au nanoparticles were observed in the heat-treated films. The red-shift of absorption peak from 590 to 635 nm was observed due to the increase in the diameter of Au nanoparticles and refractive index of TiO2 matrix with increasing the heat-treatment temperature.

Original languageEnglish
Pages (from-to)1599-1603
Number of pages5
JournalMaterials Transactions
Issue number8
Publication statusPublished - 2003 Aug


  • Anatase
  • Gold nanoparticle
  • Laser ablation
  • Optical property
  • Surface plasmon resonance
  • Titanium oxide


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