Probing Dopamine Redox Reactions Based on Au-Ag Alloys and EC-SERS
The citrate reduction method was used to synthesize Au-Ag nanoparticles of uniform size and shape,followed by the preparation of active substrates with surface-enhanced Raman scattering(SERS)response by immobilizing Au-Ag nanoparticles on ITO glass surfaces using the coffee ring effect.Using it as a working electrode for EC-SERS,we examined the spectral properties of dopamine(phenol)and dopamine(benzoquinone)on the Au-Ag surface by a combined electrochemical and SERS methods and found that H2O2 and GSH could be used to modulate their SERS spectral intensities at 1270,1335 and 1455 cm-1.Finally,the potential-dependent changes in the redox of dopamine(DA)at the electrode were investigated by the constant potential method,providing a new basis for the study of its redox properties.
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