Control of plasmon resonance of gold nanoparticles via excimer laser irradiation |
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| Authors: | Daria Riabinina Jianming Zhang Mohamed Chaker Joëlle Margot Dongling Ma Peter Tijssen |
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| Institution: | (1) Department of Electrical and Computer Engineering, Concordia University, 1515 St. Catherine W, Montreal, Quebec, Canada, H3G 2W1;(2) Department of Biology, Concordia University, 7141 Sherbrooke St W, Montreal, Quebec, Canada, H4B 1R6;(3) Department of Physics, Concordia University, 7141 Sherbrooke St W, Montreal, Quebec, Canada, H4B 1R6 |
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| Abstract: | A significant shift of the surface plasmon resonance absorption spectrum of gold nanoparticles was obtained by the oxidation
of the nanoparticle surface via pulsed excimer laser irradiation. The high UV-light absorption of gold nanoparticles chemically
produced by citrate reduction led to the important surface oxidation up to 26%. As a result of laser irradiation, the gold/gold
oxide core-shell nanoparticles with little variation of the nanoparticle size were produced. After only 5 min of laser irradiation,
a 12-nm blue shift in surface plasmon resonance was obtained. The possible mechanisms governing the modification in surface
plasmon resonance by laser irradiation of gold nanoparticles were discussed. |
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