Electrodeposition of dendritic gold/silver nanaoparticles on disposable screen-printed carbon electrode and its application of 4-mercaptopyridine in in situ electrochemical surface-enhanced Raman scattering

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• 作者：Yuanjie Teng ; Guocheng Ding ; Wenhan Liu ; Jiangmei Liu ; Yonghui Nie and Pan Li
• 刊名：Surface and Interface Analysis
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：48
• 期：9
• 页码：990-994
• 全文大小：603K
• ISSN：1096-9918

文摘

Column electrodes pretreated through oxidation–reduction cycles were traditionally used in electrochemical surface-enhanced Raman scattering (SERS). In this study, a disposable screen-printed carbon electrode was introduced into in situ electrochemical SERS through the electrodeposition of dendritic gold/silver nanoparticles (Au/AgNPs) onto the surface of the carbon working electrode to induce the SERS enhancement effect on the electrode. Scanning electron microscopy images showed that dendritic Au/AgNPs nanostructures could be fabricated under appropriate electrodeposition conditions and could present a minimum SERS factor of 4.25 × 10⁵. Furthermore, the absorbed behavior of 4-mercaptopyridine was investigated under different potentials. The adsorption configuration was inferred to transform from ‘vertical’ to ‘lying-flat’. The proposed new electrode combined with a portable Raman spectrometer could be useful in the identifying products or intermediates during electrochemical synthesis or electrochemical catalysis in in situ electrochemical SERS. Copyright