Journal
LANGMUIR
Volume 24, Issue 24, Pages 14166-14171Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la802049p
Keywords
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Funding
- U.S. Department of Defense Multidisciplinary University Research Initiative [W911NF-04-01-0203]
- AFOSR [FA9550-07-C-0032, F49620-03-C-0068]
- Robert A. Welch Foundation [C-1220]
- Gulf Coast Consortia [NIH 1 T90DK070121-01]
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The growth of a continuous, uniform Au layer on a dielectric nanoparticle is the critical step in the synthesis of nanoparticles such as nanoshells or nanorice, giving rise to their unique geometry-dependent plasmon resonant properties. Here, we report a novel, streamlined method for Au layer metallization on prepared nanoparticle surfaces using carbon monoxide as the reducing agent. This approach consistently yields plasmonic nanoparticles with highly regular shell layers and is immune to variations in precursor or reagent preparation. Single particle spectroscopy combined with scanning electron microscopy reveal that thinner, more uniform shell layers with correspondingly red-shifted optical resonances are achievable with this approach.
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