环己烷/水界面自组装纳米银膜及性能研究

在环己烷/水界面以自组装的方式将单层密排的银纳米粒子膜转移到亲水性的硅片上,以罗丹明6G(R6G)为探针分子,通过与直接滴加银胶溶液和混合R6G后的银胶溶液得到的两种SERS基底对比,密排银纳米粒子膜展现了极高的灵敏度(R6G的检测极限为10-9 mol/L)和信号再现性。结合有限时域差分法(FDTD)对其增强原因进行了模拟分析,实验结果与理论模拟基本相符。

The Properties Researched Based on the Prepared Cyclohexane/Water Interface Self-Assembly Nanometer Silver Film

A homogeneous monolayer film of the silver nanoparticles was prepared by self-assembly in cyclohexane / water interface.Using rhodamine 6G(R6G) as a probe molecule,the SERS characteristic of the silver nanoparticles monolayer film was compared with both SERS substrates by direct dropping silver colloid mixing with and without R6G,respectively.It was found that the monolayer film exhibited a high sensitivity(The detection limit of R6G was 10-9 mol/L)and reproducibility.The enhanced reason was analyzed by finite difference time domain(FDTD)method.The results showed that the experimental results and theoretical simulation were in line.