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Nanoshells made easy: improving Au layer growth on nanoparticle surfaces.


ABSTRACT: 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.

SUBMITTER: Brinson BE 

PROVIDER: S-EPMC5922771 | biostudies-literature | 2008 Dec

REPOSITORIES: biostudies-literature

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Nanoshells made easy: improving Au layer growth on nanoparticle surfaces.

Brinson Bruce E BE   Lassiter J Britt JB   Levin Carly S CS   Bardhan Rizia R   Mirin Nikolay N   Halas Naomi J NJ  

Langmuir : the ACS journal of surfaces and colloids 20081201 24


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 varia  ...[more]

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