title: In situ Raman scattering study on a controllable plasmon-driven surface catalysis reaction on Ag nanoparticle arrays.
abstract: Control of the plasmon-driven chemical reaction for the transformation of 4-nitrobenzenethiol to p,p'-dimercaptoazobenzene by Ag nanoparticle arrays was studied. The Ag nanoparticle arrays were fabricated by means of nanosphere lithography. By changing the PS particle size, the localized surface plasmon resonance (LSPR) peaks of the Ag nanoparticle arrays can be tailored from 460 to 560 nm. The controlled reaction process was monitored by in situ surface-enhanced Raman scattering. The reaction can be dramatically influenced by varying the duration of laser exposure, Ag nanoparticle size, laser power and laser excitation wavelength. The maximum reaction speed was achieved when the LSPR wavelength of the Ag nanoparticle arrays matched the laser excitation wavelength. The experimental results reveal that the strong LSPR can effectively drive the transfer of the 'hot' electrons that decay from the plasmon to the reactants. The experimental results were confirmed by theoretical calculations.
authors: Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan 430072, People's Republic of China.
authors: Z G
authors: ZG
authors: Dai
authors: X H
authors: XH
authors: Xiao
authors: Y P
authors: YP
authors: Zhang
authors: F
authors: F
authors: Ren
authors: W
authors: W
authors: Wu
authors: S F
authors: SF
authors: Zhang
authors: J
authors: J
authors: Zhou
authors: F
authors: F
authors: Mei
authors: C Z
authors: CZ
authors: Jiang
mesh_terms: D000327:Adsorption; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013438:Sulfhydryl Compounds / Q000138:chemical synthesis / Q000737:chemistry; D020349:Surface Plasmon Resonance
chemical_list: D013438:Sulfhydryl Compounds; C568766:p,p'-dimercaptoazobenzene; C014712:4-nitrothiophenolate; D012834:Silver