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    The Molecular Mechanism of Iron(III) Oxide Nucleation

    Access Status
    Fulltext not available
    Authors
    Scheck, J.
    Wu, B.
    Drechsler, M.
    Rosenberg, R.
    Van Driessche, A.
    Stawski, T.
    Gebauer, Denis
    Date
    2016
    Collection
    • Curtin Research Publications
    Type
    Journal Article
    Metadata
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    Abstract

    © 2016 American Chemical Society.A molecular understanding of the formation of solid phases from solution would be beneficial for various scientific fields. However, nucleation pathways are still not fully understood, whereby the case of iron (oxyhydr)oxides poses a prime example. We show that in the prenucleation regime, thermodynamically stable solute species up to a few nanometers in size are observed, which meet the definition of prenucleation clusters. Nucleation then is not governed by a critical size, but rather by the dynamics of the clusters that are forming at the distinct nucleation stages, based on the chemistry of the linkages within the clusters. This resolves a longstanding debate in the field of iron oxide nucleation, and the results may generally apply to oxides forming via hydrolysis and condensation. The (molecular) understanding of the chemical basis of phase separation is paramount for, e.g., tailoring size, shape and structure of novel nanocrystalline materials.

    Citation
    Scheck, J. and Wu, B. and Drechsler, M. and Rosenberg, R. and Van Driessche, A. and Stawski, T. and Gebauer, D. 2016. The Molecular Mechanism of Iron(III) Oxide Nucleation. The Journal of Physical Chemistry Letters. 7 (16): pp. 3123-3130.
    Source Title
    The Journal of Physical Chemistry Letters
    URI
    http://hdl.handle.net/20.500.11937/52111
    DOI
    10.1021/acs.jpclett.6b01237
    Department
    Department of Chemistry

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