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    Chemical kinetics of gold nanorod growth in aqueous CTAB solutions

    Access Status
    Fulltext not available
    Authors
    Bullen, C.
    Zijlstra, P.
    Bakker, Eric
    Gu, M.
    Raston, C.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Bullen, C. and Zijlstra, P. and Bakker, E. and Gu, M. and Raston, C. 2011. Chemical kinetics of gold nanorod growth in aqueous CTAB solutions. Crystal Growth and Design. 11 (8): pp. 3375-3380.
    Source Title
    Crystal Growth and Design
    DOI
    10.1021/cg101636r
    ISSN
    15287483
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/44102
    Collection
    • Curtin Research Publications
    Abstract

    The chemical kinetics of the silver-mediated growth of gold nanorods prepared by the reduction of gold precursor in aqueous cetyltrimethylammonium bromide (CTAB) solution has been systematically studied using spectroscopic monitoring and electron microscopy. The rate of monomer depletion −d[Aun+]/dt has a linear dependence on both [Aun+] and seed nuclei concentration at 30 °C. Particle growth is significantly retarded by hexadecyltrimethylammonium bromide (CTAB) and KBr, with the order ca. −1 for [Br–]. The rate of nanoparticle growth is dependent on the reducing ascorbate monoanion concentration and is consequently highly pH dependent around the pKa1 of ascorbic acid, while AgNO3 retards the observed kinetics for both the growth of nanorods from ca. 2 nm seed nuclei and the overgrowth of Au nanorods.

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