【摘要】 在一些情况下添加氯离子能引起表面增强拉曼散射的进一步增强 ,本文提出了SERS效应中氯离子在银胶粒子和分子之间搭桥 ,从而促成吸附并引起进一步增强的观点。设计了实验 ,验证了该观点的正确性更多还原

【Abstract】 The SERS is enhanced when KCl is added to silver colloid and cation molecule.The hypothesis supposed that Cl - bridged between nano silver and molecule,as a result the molecule adsorbing on nano silver surface is promoted and the SERS is therefore enhanced.The CN - and NH 3 can be better adsorbed when they are added separately to the nano silver particles,Cl - and anion molecule.The SERS reduces when CN - and NH 3 are added separately to Cl - ,anion molecule and silver colloid.The result is that the CN - and NH 3 are so strong that they have replaced Cl - and anion molecules.Therefore the SERS reduces.This has proved the bridge role of Cl -.更多还原