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Issue 27, 2014
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Self-assembly and secondary nucleation in ZnO nanostructures derived from a lipophilic precursor

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Abstract

The influence of organically capped nucleation on morphogenesis of zinc oxide (ZnO) as a technologically important iono-covalent material has been extensively investigated. However, the effect of lipid–lipid interactions on selective adsorption and the mechanism of growth is largely unknown. Here, we demonstrate a novel route toward synthesis of various ZnO nanostructures using zinc stearate, a metal soap, rather than the commonly utilised polar-soluble salts. Study of a variety of amphiphilic ligands suggests that during decomposition, secondary carboxylic acids substitute primary aliphatic tails in the precursor. In this regard, saturated and unsaturated fatty acids appear to influence the rate of progression quite differently. On the other hand, in the early stages of growth, amine adsorbates are inhibited by lipophilic tails of carboxylic acids, leading to a multi-step growth. The subsequent self-assembly of these nanorods into bundles is accompanied by recrystallisation of their stems and formation of planar defects which promote random secondary nucleation.

Graphical abstract: Self-assembly and secondary nucleation in ZnO nanostructures derived from a lipophilic precursor

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Publication details

The article was received on 03 Mar 2014, accepted on 08 Apr 2014 and first published on 08 Apr 2014


Article type: Paper
DOI: 10.1039/C4CE00442F
Citation: CrystEngComm, 2014,16, 6003-6009
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    Self-assembly and secondary nucleation in ZnO nanostructures derived from a lipophilic precursor

    W. S. Chiu, A. Yaghoubi, M. Y. Chia, N. H. Khanis, S. A. Rahman, P. S. Khiew and Y. Chueh, CrystEngComm, 2014, 16, 6003
    DOI: 10.1039/C4CE00442F

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