A silver solution for surface-enhanced Raman scattering
A silver solution for surface-enhanced Raman scattering
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DOI：
10.1016/s1386-1425(98)00282-0
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发表时间：
1999-06-01
影响因子：
4.4
通讯作者：
Coons, LB
中科院分区：
文献类型：
--
作者：
Li, YS;Cheng, JC;Coons, LB
在碱性条件下，用过氧化氢（H2O2）还原硝酸银（AgNO3）制备了一种银溶液，用于表面增强拉曼散射（Sers）。已发现温度、时间、无氧、反应混合物的pH值和试剂纯度等反应条件是影响反应过程和底物产物Sers性能的重要因素。这些因素已被评估和优化。发现T = 0 ℃、长反应时间、氮气或惰性气体吹扫以及碱性条件对于制备SERS活性银溶液是必不可少的。试剂的纯度与其他因素一样重要。这种用于生产Sers底物的还原方法的一个主要优点是减少或消除了由反应副产物引起的光谱干扰。进行了两个系列的实验来测试储存寿命和基底的老化对Sers强度的影响。比较了该银溶液与其它溶胶的Sers活性。收集了激发分布以及Sers数据对紫外光照、氧化剂和还原剂的依赖性，并根据Sers现象进行了讨论。(C)1999 Elsevier Science B.V.保留所有权利。
A silver solution has been prepared from the reduction of silver nitrate (AgNO3) by hydrogen peroxide (H2O2) under basic conditions for surface-enhanced Raman scattering (SERS). Reaction conditions such as temperature, time, absence of oxygen, pH of the reaction mixture, and reagent purity have been found to be important factors contributing to the reaction process and the SERS performance of the substrate product. These factors have been evaluated and optimized. It was found that the T = 0 degrees C, long reaction period, nitrogen or inert gas purging, and alkaline conditions are essential for preparing the SERS-active silver solution. The purity of reagents is as important as other factors. One major advantage of this reduction process for producing the substrate for SERS is the reduction or elimination of spectral interference caused by the reaction by-products. Two series of experiments have been conducted to test the shelf life and the aging effect of the substrate on the SERS intensity. Some SERS activities of the silver solution substrate have been compared with those of other sols. An excitation profile as well as the dependence of SERS data on UV illumination, oxidizing agent and reducing agent have been collected and discussed in terms of SERS phenomena. (C) 1999 Elsevier Science B.V. All rights reserved.