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  • Growth mechanism deconvolution of self-limiting supraparticles based on microfluidic system

    Author(s)
    Fu, Qiang
    Sheng, Yuping
    Tang, Hongjie
    Zhu, Zhening
    Ruan, Mingbo
    Xu, Weilin
    Zhu, Yutian
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2015
    Metadata
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    Abstract
    The synthesis of colloidal supraparticles (SPs) based on self-assembly of nanoscopic objects has attracted much attention in recent years. Here, we demonstrate the formation of self-limiting monodisperse gold SPs with core–shell morphology based on the building blocks of flexible nanoarms in one step. A flow-based microfluidic chip is utilized to slow down the assembly process of the intermediates, which surprisingly allows for observation of ultrathin gold nanoplates as first intermediates. Notably, these intermediate cannot be observed in traditional synthesis due to their rapid rolling-up to form the second-order nanostructure ...
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    The synthesis of colloidal supraparticles (SPs) based on self-assembly of nanoscopic objects has attracted much attention in recent years. Here, we demonstrate the formation of self-limiting monodisperse gold SPs with core–shell morphology based on the building blocks of flexible nanoarms in one step. A flow-based microfluidic chip is utilized to slow down the assembly process of the intermediates, which surprisingly allows for observation of ultrathin gold nanoplates as first intermediates. Notably, these intermediate cannot be observed in traditional synthesis due to their rapid rolling-up to form the second-order nanostructure of flexible hollow nanoarms. The growth mechanism of SPs can then be deconvoluted into two seed-mediated steps. Monte Carlo simulations confirm that the self-limiting growth of binary SPs is governed by a balance between electrostatic repulsion and van der Waals attraction.
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    Journal Title
    ACS Nano
    Volume
    9
    Issue
    1
    DOI
    https://doi.org/10.1021/nn5027998
    Subject
    Nanotechnology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/172641
    Collection
    • Journal articles

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