posted on 2024-01-27, 14:29authored byQian Yuan, Li-Wen Wu, Yi-Fan Huang
Creating surface-enhanced Raman scattering
(SERS) activity
on an
electrode is key to performing in situ electrochemical SERS measurements.
Electrochemical adsorption of SERS-active nanoparticles onto an electrode
was a clean method. The electrochemical adsorption of SERS-active
Au-core@Pt-shell (Au@Pt) nanoparticles on a Pt ultramicroelectrode
has not been explored yet. Here, we demonstrate a method of making
a SERS-active Pt ultramicroelectrode by electrochemically adsorbing
Au@Pt nanoparticles. The applied voltage and adsorption time were
key parameters for improving the sensitivity of the SERS measurement
on a Pt ultramicroelectrode, which were optimized according to the
SERS intensity of p-methylthiophenol. Our methods
were available on Pt ultramicroelectrodes with different radii. The
potential-dependent SERS of p-methylthiophenol showed
that the prepared Pt ultramicroelectrode covered by Au@Pt nanoparticles
can be used in EC-SERS measurements.