4-Aminothiophenol strong SERS signal enhancement at electrodeposited silver surface

Abstract

Strong surface enhancement Raman spectroscopy signal of 4-aminothiophenol on silver substrate prepared by controlled electrodepostition is documented in this article. Enhancement factor was found to affect not only by nanoparticle size, shape, orientation and spatial distribution, but also by interaction of Ag nanoparticles with thiol group of testing analyte. Self-assembled monolayers formation was contributed to this unique signal enhancement. The enhancement factor was established of 1.81×1014.