Nanoshells made easy: improving Au layer growth on nanoparticle surfaces.
Nanoshells made easy: improving Au layer growth on nanoparticle surfaces.
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DOI:
10.1021/la802049p
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发表时间:
2008-12-16
期刊:
影响因子:
--
通讯作者:
Halas NJ
中科院分区:
文献类型:
--
作者:
Brinson BE;Lassiter JB;Levin CS;Bardhan R;Mirin N;Halas NJ
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 redshifted optical resonances are achievable with this approach.
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