高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (9): 1220.

• 论文 • 上一篇    下一篇

化学法沉积银岛膜上的表面增强拉曼散射(Ⅰ)

张建华, 梁映秋   

  1. 吉林大学理论化学研究所, 长存, 130023
  • 收稿日期:1990-04-23 出版日期:1991-09-24 发布日期:1991-09-24
  • 通讯作者: 张建华
  • 基金资助:

    国家自然科学基金

Surface Enhanced Raman Scattering of Malachite Green on Silver Film from Chemical Method (Ⅰ)

Zhang Jian-hua, Liang Ying-qiu   

  1. Institute of Theoretical Chemistry, Jilin University, Changchun, 130023
  • Received:1990-04-23 Online:1991-09-24 Published:1991-09-24

摘要: 用银镜反应在抛光的石英片上沉积银膜,经扫描电镜研究表明,控制反应条件可得到表面粒度为50~140nm的SERS活性银岛膜表面,将此活性表面直接插入含微量孔雀石绿水溶液中,测量吸附孔雀石绿分子的拉曼光谱,可获得105倍的拉曼增强,孔雀石绿浓度小到10-10mol/L时,仍能得到明确的光谱信息,给出了浓度与强度的关系,讨论了吸附作用对几个重要振动带的影响。

关键词: 表面增强拉曼散射, 孔雀石绿, 吸附几何构型

Abstract: A SERS-active silver film was obtained by chemical reduction method on optic polished quartz slides. Studies of the scanning electron microscopy on the silver film indicated that the Ag particles were uniform and the size distribution ranged from 50 nm to 140 nm which suited for SERS measurement. SERS spectra of the malachite green with an enhancement factor 2. 3 ×10-5were measured. The limit of detection was found to be 10-10mol/L. The adsorption geometry was deduced by comparing the SERSspectra with the raman spectra on the solid malachite green or malachite green aqueous solution. There was a phase transition of the silver film from "being flat" to "being perpendicular" when the bulk concentration of the malachite green changed from 1. 0×10-7mol/Lto.1. 0× 10-6mol/L.

Key words: Surface enhanced raman scattering, Malachite green, Adsorption geometry

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