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  • Ultra-stable silica-coated chiral Au-nanorod assemblies: Core–shell nanostructures with enhanced chiroptical properties

    Author(s)
    Han, Bing
    Shi, Lin
    Gao, Xiaoqing
    Guo, Jun
    Hou, Ke
    Zheng, Yonglong
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2016
    Metadata
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    Abstract
    Chiral nano-assemblies with amplified optical activity have attracted particular interest for their potential application in photonics, sensing and catalysis. Yet it still remains a great challenge to realize their real applications because of the instability of these assembled nanostructures. Herein, we demonstrate a facile and efficient method to fabricate ultra-stable chiral nanostructures with strong chiroptical properties. In these novel chiral nanostructures, side-by-side assembly of chiral cysteine-modified gold nanorods serves as the core while mesoporous silica acts as the shell. The chiral core–shell nanostructures ...
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    Chiral nano-assemblies with amplified optical activity have attracted particular interest for their potential application in photonics, sensing and catalysis. Yet it still remains a great challenge to realize their real applications because of the instability of these assembled nanostructures. Herein, we demonstrate a facile and efficient method to fabricate ultra-stable chiral nanostructures with strong chiroptical properties. In these novel chiral nanostructures, side-by-side assembly of chiral cysteine-modified gold nanorods serves as the core while mesoporous silica acts as the shell. The chiral core–shell nanostructures exhibit an evident plasmonic circular dichroism (CD) response originating from the chiral core. Impressively, such plasmonic CD signals can be easily manipulated by changing the number as well as the aspect ratio of Au nanorods in the assemblies located at the core. In addition, because of the stabilization effect of silica shells, the chiroptical performance of these core–shell nanostructures is significantly improved in different chemical environments.
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    Journal Title
    Nano Research
    Volume
    9
    Issue
    2
    DOI
    https://doi.org/10.1007/s12274-015-0926-4
    Subject
    Nanotechnology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/172633
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    • Journal articles

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