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http://dx.doi.org/10.5229/JKES.2013.16.1.46

Preparation of Electrochemically Stable and SERS Active Silica@Gold Microshell  

Piao, Lilin (Department of Chemistry, Seoul National University)
Lee, Jihye (Department of Chemistry, Seoul National University)
Chung, Taek Dong (Department of Chemistry, Seoul National University)
Publication Information
Journal of the Korean Electrochemical Society / v.16, no.1, 2013 , pp. 46-51 More about this Journal
Abstract
In order to monitor in situ electrochemical reaction we prepared the gold microshells on silica microspheres of $2{\mu}m$ in diameter which were able to not only work as electrodes but also surface enhanced Raman scattering (SERS) active substrates. Previously reported gold microshell using polystyrene as core material have a few serious problems, mostly coming from solubility in organic solvent, nonuniform distribution in size and toxicity of the polystyrene. Here we prepared silica core-gold microshell to obtain a strong SERS active platform benefitting from the physicochemical stability, uniformity and non-toxicity of silica. Varying the concentration of 3-aminopropyl triethoxysilane (APTES), the surfaces of silica beads were modified and the optimal condition was determined to be 1% APTES that made the SERS activity of gold microshell strongest. The gold microshells as made were characterized by homemade Micro-Raman system spectrometer, Field-Emission Scanning Electron Microscope.
Keywords
Electrochemistry; Electroless plating; Gold microshell; Surface enhanced Raman scattering; Surface probing;
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Times Cited By KSCI : 1  (Citation Analysis)
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