title: Temperature effect on the SERS signature of p-aminothiophenol: a new evidence for the production of p,p'-dimercaptoazobenzene on metallic nanostructures.
abstract: We investigated the effect of the temperature of the plasmonic substrate on the surface enhanced Raman scattering of p-aminothiophenol adsorbed onto a particulate film of gold nanoparticles-decorated polystyrene nanospheres. The results demonstrated that temperature induces important modifications in the overall spectral signature of the charge transfer bands, which are consistent with the generation of a new molecular species. Moreover, the analysis of the shape of the vibrational band at 1078 cm(-1) assigned to the >C-S mode, which is enhanced by electromagnetic mechanism, reveals the co-existence of two distinct bands at 1071 and 1078 cm(-1), assignable to p,p'-dimercaptoazobenzene and p-aminothiophenol, respectively.
authors.affiliation: Nanobiophotonics Center, Interdisciplinary Research Institute in Bio-Nano-Sciences and Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj Napoca, Romania.
authors.forename: V
authors.initials: V
authors.lastname: Canpean
authors.forename: S
authors.initials: S
authors.lastname: Astilean
mesh_terms: D000327:Adsorption; D000814:Aniline Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D013059:Spectrum Analysis, Raman; D013438:Sulfhydryl Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D013696:Temperature
chemical_list: D000814:Aniline Compounds; D011137:Polystyrenes; D013438:Sulfhydryl Compounds; C568766:p,p'-dimercaptoazobenzene; D006046:Gold; C064316:4-aminothiophenol