Preparation and Characterization of Surface-Enhanced Raman Scattering (SERS) Active Substrates Based on Etching and Displacement Deposition

• Main Authors: Hsu-Mien Chen, 陳許綿
• Other Authors: 楊吉斯
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/65751030311177084642

碩士 === 國立中興大學 === 化學系所 === 94 === A new method to produce surface enhanced Raman scattering (SERS) substrates was proposed in this work. This method was based on combination of the techniques of reverse micelle formation, chemical etching, and electroless deposition. Copper and silver were selected as metal substrate and the metal to form the nanostructure on the surface of the substrates. Meanwhile, five hydrophobic polymers with four surfactants were selected to form the reverse micelle systems and nitric acid was used as etching agent. Four steps involved in production of the SERS substrates including 1. formation of porous template on copper metal through formation of reverse micelle; 2. etching of the copper through the pores of the template by nitric acid; 3. electroless displacement of copper by silver ions through the etched region 4. removing the residual template by organic solvent. To understand the influences of each factor in production of the SERS substrates, factors such as the composition of reverse micelle system, the thickness of template, the concentration of etching agent, the etching time, the reaction time for displacement, and the concentration of reagents in displacement were investigated. Through the correlations of the reaction conditions with the SERS signals and the morphologies of the produced substrates, the conditions to produce SERS substrates were optimized and an enhancement factor around 4 x 102 could be generally obtained.