Nanoparticle-laden droplets of liquid crystals: Interactive morphogenesis and dynamic assembly.

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ID: 2686
2019
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Abstract
Defects in liquid crystals serve as templates for nanoparticle (NP) organization; however, NP assembly in cholesteric (Ch) liquid crystals is only beginning to emerge. We show interactive morphogenesis of NP assemblies and a Ch liquid crystalline host formed by cellulose nanocrystals (CNCs), in which both the host and the guest experience marked changes in shape and structure as a function of concentration. At low NP loading, Ch-CNC droplets exhibit flat-ellipsoidal packing of Ch pseudolayers, while the NPs form a toroidal ring- or two cone-shaped assemblies at droplet poles. Increase in NP loading triggers reversible droplet transformation to gain a core-shell morphology with an isotropic core and a Ch shell, with NPs partitioning in the core and in disclinations. We show programmable assembly of droplets carrying magnetic NPs. This work offers a strategy for NP organization in Ch liquid crystals, thus broadening the spectrum of architectures of soft nanostructured materials.
Reference Key
li2019nanoparticleladenscience Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Yunfeng;Khuu, Nancy;Prince, Elisabeth;Alizadehgiashi, Moien;Galati, Elizabeth;Lavrentovich, Oleg D;Kumacheva, Eugenia;
Journal Science advances
Year 2019
DOI
10.1126/sciadv.aav1035
URL
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