表面增强拉曼光谱研究尼古丁与金属纳米粒子的相互作用  

Surface-enhanced Raman spectral studies on the interaction between nicotine and metal nanoparticles

作　　者：刘自纯[1] 李文嘉[1] 余洁[1] 李为娇[1] 胡兰兰[1] 金姗霞[1] 李跃英[1] 叶勇[1] 

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2011年第4期521-524,532,共5页Journal of Hubei University：Natural Science

基　　金：湖北省自然科学基金(2008CDB259)资助

摘　　要：以金、银纳米及Au@Ag、Au-Ag合金复合纳米粒子为基底,研究尼古丁分子的表面增强拉曼光谱,讨论分子在4种纳米粒子表面的作用方式及可能的吸附取向.结果表明,分子在金纳米和Au-Ag合金纳米粒子表面的吸附取向相同———垂直吸附,不同的是与金纳米粒子形成了稳定的N—Au键;由于银纳米粒子和Au@Ag核壳纳米粒子表面均富含大量银,因此分子在这两种纳米表面为相同的末端吸附取向,不同的是与银纳米粒子形成了Ag—N键和Ag—C键.In present work,four adsorbing substrates（gold nanoparticles,silver nanoparticles,gold-silver core-shell nanoparticles and gold-silver alloy nanoparticles） were synthesized.The possible adsorption orientation and interaction behavior of nicotine on these adsorbing substrates were investigated respectively by the surface-enhanced Raman spectroscopy.It was concluded that the molecule was adsorbed on the surfaces of the gold and the gold-silver alloy nanoparticles,with a similar vertical adsorption orientation.Nicotine molecule interacted with the gold surface directly through the N—Au bond.However,as the surfaces of the silver and gold-silver core-shell were rich in Ag,the molecule employed an extremity adsorption orientation.Nicotine molecule interacted with the silver surface directly through the Ag—N bond and Ag—C bond.

关 键 词：表面增强拉曼光谱 尼古丁 金属纳米粒子 

分 类 号：O657.3[理学—分析化学]