Disentangling SERS signals from two molecular species: A new evidence for the production of p,p '-dimercaptoazobenzene by catalytic coupling reaction of p-aminothiophenol on metallic nanostructures

作者：Canpean V^*; Iosin M; Astilean S

来源：Chemical Physics Letters, 2010, 500(4-6): 277-282.

DOI：10.1016/j.cplett.2010.10.006

An intriguing case has recently emerged in SERS literature regarding the correct interpretation of SERS fingerprints recorded from p-aminothiophenol molecules adsorbed on metallic surface. In this work we present an original approach to demonstrate the production of p,p'-dimercaptoazobenzene (DMAB) by catalytic coupling reaction of p-aminothiophenol (p-ATP) on the surface of polystyrene spheres decorated with gold nanoparticles. With the aim of disentangling the SERS signals from these two molecular species, our approach combines the correlation analysis of time-dependent intensity fluctuations of some representative SERS bands with their spatial mapping performed by Scanning Confocal Raman Microscopy.

• 出版日期2010-11