Corresponding Author

Jian-lin YAO(jlyao@suda.edu.cn)


This study was performed based on shell-isolated nanoparticles-enhanced Raman spectroscopy (SHINERS) technology. The Au@SiO2 nanoparticles were prepared and characterized by TEM and cyclic voltammetry. It was shown that the shell of SiO2 was compact. The high quality signal measured by surface enhanced Raman spectroscopy (SERS) was obtained from the adsorbed pyridine on Ti/Au@SiO2 electrode. The origin of the SERS signals was further confirmed by testing Pt and Ni electrodes. In addition, potential dependent adsorption behavior was investigated. It was found that pyridine was adsorbed parallel on the surface from -0.1 V to -0.6 V, and converted to perpendicular adsorption from -0.6 V. At last, pyridine was desorbed from the electrode accompanied with hydrogen evolution when the potential moved to -1.2 V.

Graphical Abstract


surface enhanced Raman spectroscopy, Ti electrode, Au@SiO2 nanoparticles, pyridine

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