Surface Plasmon Mediated Chemical Solution Deposition of Gold Nanoparticles on a Nanostructured Silver Surface at Room Temperature

Sub-15 nm Au nanoparticles have been fabricated on a nanostructured Ag surface at room temperature via a liquid-phase chemical deposition upon excitation of the localized surface plasmon resonance (SPR). Measurement of the SPR-mediated photothermal local heating of the substrate surface by a molecul...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2013-01, Vol.135 (1), p.38-41
Main Authors: Qiu, Jingjing, Wu, Yung-Chien, Wang, Yi-Chung, Engelhard, Mark H, McElwee-White, Lisa, Wei, Wei David
Format: Article
Language:English
Subjects:
Gold - chemistry
Metal Nanoparticles - chemistry
Particle Size
Silver - chemistry
Solutions
Surface Plasmon Resonance
Surface Properties
Temperature
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Summary:Sub-15 nm Au nanoparticles have been fabricated on a nanostructured Ag surface at room temperature via a liquid-phase chemical deposition upon excitation of the localized surface plasmon resonance (SPR). Measurement of the SPR-mediated photothermal local heating of the substrate surface by a molecular thermometry strategy indicated the temperature to be above 230 °C, which led to an efficient decomposition of CH3AuPPh3 to form Au nanoparticles on the Ag surface. Particle sizes were tunable between 3 and 10 nm by adjusting the deposition time. A surface-limited growth model for Au nanoparticles on Ag is consistent with the deposition kinetics.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja309392x