银、金碳纳米复合材料的制备及SERS性能研究

Study on Preparation and SERS Performance of Silver-Carbon and Gold-Carbon Nanocomposite Materials

表面增强拉曼散射技术是一种重要且功能强大的分析工具,在环境监测、化学分析和生物医学研究中备受关注。我们开发了一种简易的方法来制备不同形貌的银碳纳米复合材料和金碳纳米复合材料。采用一步水热法,以三辛胺(TOA)为表面活性剂和软模板,通过改变TOA的添加量,制备得到不同形貌的复合材料。在整个反应过程中,葡萄糖、硝酸银和TOA之间具有明显的协同效应。拉曼测试结果表明,制得的材料具有长期稳定性和优异的增强性能,适合作为甲基紫分子的拉曼增强基底。

Surface-enhanced Raman scattering( SERS) technique is an important and powerful analytical tool,which has attracted much attention for environmental monitoring,chemical analysis and biomedical research. In this paper,we developed a facile method to fabricate the silver-carbon nanocomposites( Ag/CSs) and gold-carbon nanocomposites( Au/CSs). The composites were prepared by one-step hydrothermal reduction method using trioctylamine( TOA) as the soft template and extractant. According to the different amount of TOA added,we prepared composite materials with different morphologies. When the amount of TOA was 1. 0 m L,the core-shell composite was obtained. During the whole process,there was a synergistic effect among glucose,silver nitrate and TOA. Several Raman test results showed that we have obtained a SERS substrate with long-term stability and superior SERS performance.