Si M, Wu R, Zhang P
Department of Physics, Chuxiong Teacher's College, 675000 Chuxiong.
Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Jun;21(3):343-6.
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 NH3 can be better adsorbed when they are added separately to the nano-silver particles, Cl- and anion molecule. The SERS reduces when CN- and NH3 are added separately to Cl-, anion molecule and silver colloid. The result is that the CN- and NH3 are so strong that they have replaced Cl- and anion molecules. Therefore the SERS reduces. This has proved the bridge role of Cl-.
当向银胶体和阳离子分子中加入氯化钾时，表面增强拉曼光谱（SERS）会增强。该假说认为，氯离子在纳米银和分子之间形成桥连，从而促进分子吸附在纳米银表面，因此SERS增强。当氰根离子（CN⁻）和氨（NH₃）分别添加到纳米银颗粒、氯离子和阴离子分子中时，它们能够更好地被吸附。当CN⁻和NH₃分别添加到氯离子、阴离子分子和银胶体中时，SERS会降低。结果表明，CN⁻和NH₃的吸附能力很强，以至于它们取代了氯离子和阴离子分子。因此，SERS降低。这证明了氯离子的桥连作用。
