纳米银沉积在不同基底上的表面增强拉曼效果

Substrates of Silver Nanoparticles on Different Plates for Surface Enhanced Raman Spectroscopy

采用化学还原法制备了花状纳米银凝胶溶胶,沉积在硅片、二氧化钛薄膜、玻璃上,制备得到了AgNP@Si,AgNP@TiO_2,AgNP@G 3种表面增强拉曼基底。以罗丹明6G(R6G)为探针分子,考察了3种基底的表面增强拉曼效果,重复性及均匀性。AgNP@TiO_2和AgNP@Si的检出限为10^(-8) mol·L^(-1),而AgNP@G的检出限为10^(-7) mol·L^(-1),AgNP@Si的重复性和均匀性最优。结果表明,AgNP@Si的SERS增强效果最佳,并具有制备简单,重复性和均匀性好等优点。

We prepared the flower-like silver nanoparticles by using chemical reduction method and deposited it on silicon wafer,TiO_2 film and glass plate（AgNP@Si,AgNP@TiO_2,AgNP@G）separately in order to get substrates for surface enhanced Raman spectroscopy.The repeatability,sensitivity and uniformity of these substrates were studied by using R6G solution.The detection limit of AgNP@TiO_2 and AgNP@Si was 10^（-8） mol·L^（-1）,while the AgNP@G was 10^（-7） mol·L^（-1）.Meanwhile,repeatability and uniformity of AgNP@Si are better than others.The results show that the AgNP@Si has the best Raman enhancement effect,the simple preparation,good repeatability and uniformity.