1. Optical Nonlinearity of Mesoporous Silica Thin Films Embedded with Gold Nanoparticles.
- Author
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Fang, Jingyue, Qin, Shiqiao, Zhang, Xueao, Wang, Guang, Chen, Wei, Nie, Yongming, Fang, Liang, and Chang, Shengli
- Subjects
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MESOPOROUS materials , *THIN films spectra , *GOLD nanoparticles , *X-ray diffraction , *OPTICAL properties , *NANOCOMPOSITE materials - Abstract
The mesoporous silica thin films (MSTFs) synthesized by evaporation-induced self-assembly were loaded with gold nanoparticles (GNPs). The TEM and XRD characterizations showed that the template of MSTF possessed a well-ordered mesostructure, and GNPs can be well crystallized in the thin film by neutralization and hydrogen-reduction reactions. The z-scan technique was used for studying the nonlinear optical properties of the GNPs/MSTF nanocomposite. The results showed that this kind of material was possessed of a relatively feeble nonlinear absorption but an obvious nonlinear refraction. The nonlinear refractive index was estimated to be 7.9 × 10−11 cm2/W and the theoretical fitting well matched with the measured data. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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