Nanostructured silver/polystyrene composite film: Preparation and ultrafast third-order optical nonlinearity

作者：Zeng Rong; Wang Shu Feng; Liang Hai Chun; Rong Min Zhi; Zhang Ming Qiu^*; Zeng Han Min; Gong Qi Huang

来源：Polymers and Polymer Composites, 2002, 10(4): 291-298.

• Chloroform
• Optical susceptibility
• Polystyrene composite films
• Solution-mixing
• Static-casing
• Time resolved femtosecond optical Kerr effects
• Ultrafast third order optical nonlinearity
• Water-in-oil micro-emulsion

Surface-modified silver nanoparticles with various sizes, synthesized by water-in-oil micro-emulsion, were incorporated into polystyrene (PS) to form transparent nanocomposite films through solution-mixing and static-casting. It was found that the Ag nanoparticles could be re-dispersed well in the polymer matrix by using chloroform as a solvent due to a strong interaction between Ag and chloroform. XPS analysis suggested that there is no obvious interaction between nanosilver and the polystyrene matrix. The third-order nonlinear optical susceptibility of Ag/PS nanocomposite films is around 10-esu and increases with increasing particle size, as measured by the time-resolved femtosecond optical Kerr effect experiment at a wavelength of 830nm. The results demonstrate that the present fabrication approach can effectively tailor the structure and properties of the nanocomposites.

• 出版日期2002