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
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 x 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 (c) 2016 John Wiley Sons, Ltd.