Journal
NANOTECHNOLOGY
Volume 23, Issue 33, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/33/335701
Keywords
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Funding
- NSFC [10905043, 11005082, 91026014, 11175133, 51171132]
- Foundations from Chinese Ministry of Education [311003, 20100141120042, 20110141130004]
- Open Research Fund of State Key Laboratory of Electronic Thin Films and Integrated Devices (UESTC) [KFJJ201004]
- Young Chenguang Project of Wuhan City [201050231055]
- Fundamental Research Funds for the Central Universities, Hubei Provincial Natural Science Foundation [2011CDB270]
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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.
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