Self-assembly of cerium oxide nanostructures in ice molds

Ajay S. Karakoti, Satyanarayana V.N.T. Kuchibhatla, Donald R. Baer, Suntharampillai Thevuthasan, Dean C. Sayle, Sudipta Seal

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    26 Citations (Scopus)

    Abstract

    The formation of nanorods, driven by the physicochemical phenomena during the freezing and after the aging of frozen ceria nanoparticle suspensions, is reported. During freezing of a dilute aqueous solution of CeO2 nanocrystals, some nuclei remain in solution while others are trapped inside micro- and nanometer voids formed within the growing ice front. Over time (2-3 weeks) the particles trapped within the nanometer-wide voids in the ice combine by an oriented attachment process to form ceria nanorods. The experimental observations are consistent with molecular dynamics simulations of particle aggregation in constrained environments. These observations suggest a possible strategy for the templated formation of nanostructures through self-assembly by exploiting natural phenomena, such as voids formed during freezing of water. This research suggests a very simple, green chemical route to guide the formation of one- and three-dimensional self-assembled nanostructures.

    Original languageEnglish
    Pages (from-to)1210-1216
    Number of pages7
    JournalSmall
    Volume4
    Issue number8
    DOIs
    Publication statusPublished - 1 Aug 2008

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    Keywords

    • Cerium oxide
    • Ice
    • Nanorods
    • Self-assembly
    • Templates

    ASJC Scopus subject areas

    • Biotechnology
    • Biomaterials
    • Chemistry(all)
    • Materials Science(all)

    Cite this

    Karakoti, A. S., Kuchibhatla, S. V. N. T., Baer, D. R., Thevuthasan, S., Sayle, D. C., & Seal, S. (2008). Self-assembly of cerium oxide nanostructures in ice molds. Small, 4(8), 1210-1216. https://doi.org/10.1002/smll.200800219