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    Real-time probing of the growth dynamics of nanoparticles using potentiometric ion-selective electrodes

    Access Status
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    Authors
    Chumbimuni-Torres, K.
    Bakker, Eric
    Wang, J.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Chumbimuni-Torres, Karin Y. and Bakker, Eric and Wang, Joseph. 2009. Real-time probing of the growth dynamics of nanoparticles using potentiometric ion-selective electrodes. Electrochemistry Communications 11: pp. 1964-1967.
    Source Title
    Electrochemistry Communications
    DOI
    10.1016/j.elecom.2009.08.029
    ISSN
    13882481
    School
    Nanochemistry Research Institute (Research Institute)
    URI
    http://hdl.handle.net/20.500.11937/37421
    Collection
    • Curtin Research Publications
    Abstract

    This Communication demonstrates the ability of potentiometric ion-selective electrodes (ISE) to probe the growth dynamics of metal nanoparticles in real-time. The new monitoring capability is illustrated using a solid-contact silver ISE for monitoring the hydroquinone-induced precipitation of silver on gold nanoparticle seeds. Potential-time recordings obtained under different conditions are used to monitor the depletion of the silver ion during the nanoparticle formation and shed useful insights into the growth dynamics of the nanoparticles. Such potentiometric profiles correlate well with the analogous optical measurements. The new real-time electrochemical probing of the particle growth process reflects the direct, rapid and sensitive response of modern ISE to changes in the level of the precipitated metal ion from the bulk solution and holds considerable promise for probing the preparation of different nanoscalematerials.

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