Thermal stability of silver nanoparticles and SiO2 composite films

Li Hua Chen, Gang Xu, Lei Miao, Chun Ming Huang, Xue Qing Xu

研究成果: Article査読

抄録

Nano-Ag-SiO2 composite films with Ag nanoparticles embedded in SiO2 were prepared by sol-gel method via hydrolyze reactions. The thermal stabilization of nano-Ag-SiO2 film was investigated by the absorbance spectrum of localized surface plasmon resonance (SPR) of Ag nanoparticles. The nano-Ag-SiO2 film was further characterized by thermogravimety-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersire spectrometer(EDS). The results show that the SPR peaks of Ag nanoparticles in the films appear and strengthen after annealeding, then weaken and finally disappear when the annealing temperature increases from 200 to 900°C, with the maximum absorbance at the annealing temperature of 500 and 600°C. The film annealed at 500°C has a good thermal stability, wherein SiO2 in the nanocomposites is amorphous. Ag nanoparticles get diffusing and volatilizing with increasing the temperature to 700°C and the annealing time increases, at the same time, SiO2 particles transform into crystalloid from noncrystal.

本文言語English
ページ(範囲)6-11
ページ数6
ジャーナルCailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
32
6
出版ステータスPublished - 2011 6月
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理学および天文学(全般)

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