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

Abstract

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 × 10 5 . 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.

Screen-Printed Electrodes Modified with Metal Nanoparticles for Small Molecule Sensing

“…Bimetallic clusters can also serve for biotin labelling detection in multivitamin tablets with Cd-Ti functionalized with neutravidin [97] and SERS enhancement effect to study 4-mercaptopyridine adsorption-desorption onto electrodeposited dendritic Au-Ag NPs [98].…”

1-(Pyridin-4-yl)-4-thiopyridine (PTP) in the crystalline state – pure PTP and a cocrystal and salt

“…The occurrence of such lone electron pairs allows three possible interactions between mercaptopyridine molecules and a the metal surface (Zheng et al, 2014;Bryant et al, 1992;Zhang et al, 2007). In addition, 4-mercaptopyridine has been found to demonstrate potential application in the field of optical sensors and solar cells (Li et al, 2012;Monari et al, 2008;Teng et al, 2016).…”