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  • Rapid-Heating-Triggered in Situ Solid-State Transformation of Amorphous TiO2 Nanotubes into Well-Defined Anatase Nanocrystals

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    Zhao161552.pdf (1.263Mb)
    File version
    Accepted Manuscript (AM)
    Author(s)
    Gao, Zhonghui
    Zhao, Ying
    Wang, Haifeng
    Wang, Yun
    Jiang, Lixue
    Xu, Yiming
    Xu, Baixiang
    Zheng, Lirong
    Jin, Chuanhong
    Liu, Porun
    Yang, Huagui
    Zhao, Huijun
    Yang, Xianjin
    Huang, Yunhui
    Griffith University Author(s)
    Wang, Yun
    Zhao, Huijun
    Liu, Porun
    Year published
    2019
    Metadata
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    Abstract
    Fabrication of nanocrystals from their disordered solid-state precursors represents a new synthetic strategy. Compared to the widely used chemical vapor deposition and wet-chemistry based methods employing gas and liquid phased precursors, the solid-state transformation of disordered solid precursors to highly ordered crystals is a great challenge due to the severely restricted mass transport and inadequate structural directing mechanism. Herein, we report a rapid-heating-triggered in situ solid-state crystal growth method capable of transforming amorphous TiO2 nanotubes into anatase nanocrystals with well-defined facets and ...
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    Fabrication of nanocrystals from their disordered solid-state precursors represents a new synthetic strategy. Compared to the widely used chemical vapor deposition and wet-chemistry based methods employing gas and liquid phased precursors, the solid-state transformation of disordered solid precursors to highly ordered crystals is a great challenge due to the severely restricted mass transport and inadequate structural directing mechanism. Herein, we report a rapid-heating-triggered in situ solid-state crystal growth method capable of transforming amorphous TiO2 nanotubes into anatase nanocrystals with well-defined facets and uniform sizes within a minute. The results obtained from in situ transmission electron microscopy and three-dimensional phase-field simulation indicate that the basic building blocks are formed through mechanical rupture of an amorphous TiO2 nanotube precursor, followed by an enhanced diffusion and concomitant oriented attachment onto TiO2 crystal nuclei mediated by the fluorine species evolved from the rapid heating. The unique crystal growth demonstrated in this work provides an alternative synthetic means for fabrication of other nanocrystals from solid-state precursors.
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    Journal Title
    CRYSTAL GROWTH & DESIGN
    Volume
    19
    Issue
    2
    DOI
    https://doi.org/10.1021/acs.cgd.8b01604
    Copyright Statement
    This document is the Postprint: Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth & Design, © 2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/acs.cgd.8b01604
    Subject
    Inorganic chemistry
    Physical chemistry
    Materials engineering
    Publication URI
    http://hdl.handle.net/10072/383085
    Collection
    • Journal articles

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