正、负电性纳米银吸附阴、阳离子型分子的SERS比较

A Comparison of SERS of Positive and Negative Nano-silver Adsorbing Cation and Anion Molecule

使用表面带负电的胶态纳米银 ,分别进行阴、阳离子型分子的SERS效应研究 ,并与表面带正电的胶态纳米银比较。当阳离子型分子盐酸副玫瑰苯胺吸附在正、负电性纳米银表面上时 ,后者SERS较强 ,当阴离子型分子吲哚丁酸分别吸附在这两种胶态纳米银上时 ,后者无SERS效应。

A study on the negative charge colloid of nano-silver particles with anion and cation molecules has been done. The results of the experiment show that the negative charge colloid of nano-silver particle has no SERS effect when anion molecule adsorbed on its surface. While the cation molecule in adsorbed on its surface the SERS effect is enhanced. The SERS effects are just opposite when the two molecules, separately adsorbed on the surface of the positive colloid of nano-silver particles. The paper hypothesizes that strong SERS effect can be got by using proper colloid of nano-silver particles. It is practical to develop the use of SERS.