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Colloidal interactions and unusual crystallization versus de-mixing of elastic multipoles formed by gold mesoflowers

Author

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  • Ye Yuan

    (University of Colorado)

  • Mykola Tasinkevych

    (Universidade de Lisboa
    Universidade de Lisboa)

  • Ivan I. Smalyukh

    (University of Colorado
    University of Colorado
    National Renewable Energy Laboratory and University of Colorado)

Abstract

Colloidal interactions in nematic liquid crystals can be described as interactions between elastic multipoles that depend on particle shape, topology, chirality, boundary conditions and induced topological defects. Here, we describe a nematic colloidal system consisting of mesostructures of gold capable of inducing elastic multipoles of different order. Elastic monopoles are formed by relatively large asymmetric mesoflower particles, for which gravity and elastic torque balancing yields monopole-type interactions. High-order multipoles are instead formed by smaller mesoflowers with a myriad of shapes corresponding to multipoles of different orders, consistent with our computer simulations based on free energy minimization. We reveal unexpected many-body interactions in this colloidal system, ranging from de-mixing of elastic monopoles to a zoo of unusual colloidal crystals formed by high-order multipoles like hexadecapoles. Our findings show that gold mesoflowers may serve as a designer toolkit for engineering colloidal interaction and self-assembly, potentially exceeding that in atomic and molecular systems.

Suggested Citation

  • Ye Yuan & Mykola Tasinkevych & Ivan I. Smalyukh, 2020. "Colloidal interactions and unusual crystallization versus de-mixing of elastic multipoles formed by gold mesoflowers," Nature Communications, Nature, vol. 11(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14031-2
    DOI: 10.1038/s41467-019-14031-2
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