Starfruit-Shaped Gold Nanorods and Nanowires: Synthesis and SERS Characterization

Recently, branched and star-shaped gold nanoparticles have received significant attention for their unique optical and electronic properties, but most examples of such nanoparticles have a zero-dimensional shape with varying numbers of branches coming from a quasi-spherical core. This report details...

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Bibliographic Details
Published inLangmuir Vol. 28; no. 24; pp. 9034 - 9040
Main Authors Vigderman, Leonid, Zubarev, Eugene R
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 19.06.2012
Subjects
Gold - chemistry
Nanotubes - chemistry
Nanowires - chemistry
Particle Size
Spectrum Analysis, Raman
Surface Properties
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Summary:Recently, branched and star-shaped gold nanoparticles have received significant attention for their unique optical and electronic properties, but most examples of such nanoparticles have a zero-dimensional shape with varying numbers of branches coming from a quasi-spherical core. This report details the first examples of higher-order penta-branched gold particles including rod-, wire-, and platelike particles which contain a uniquely periodic starfruitlike morphology. These nanoparticles are synthesized in the presence of silver ions by a seed-mediated approach based on utilizing highly purified pentahedrally twinned gold nanorods and nanowires as seed particles. The extent of the growth can be varied, leading to shifts in the plasmon resonances of the particles. In addition, the application of the starfruit rods for surface-enhanced Raman spectroscopy (SERS) is demonstrated.
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ISSN:0743-7463
1520-5827
DOI:10.1021/la300218z