nn9b03926_si_002.mp4 (2.48 MB)
Nonsphere Drop Impact Assembly of Graphene Oxide Liquid Crystals
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posted on 2019-07-10, 00:00 authored by Qiuyan Yang, Yanqiu Jiang, Dongyu Fan, Kan Zheng, Jiayi Zhang, Zhen Xu, Weiquan Yao, Qingxu Zhang, Yihu Song, Qiang Zheng, Liwu Fan, Weiwei Gao, Chao GaoCreating
long-lived topological textured liquid crystals (LCs)
in confined nonspherical space is of significance in both generations
of structures and fundamental studies of topological physics. However,
it remains a great challenge due to the fluid character of LCs and
the unstable tensional state of transient nonspheres. Here, we realize
a rich series of topological textures confined in nonspherical geometries
by drop impact assembly (DIA) of graphene oxide (GO) aqueous LCs.
Various highly curved nonspherical morphologies of LCs were captured
by gelator bath, generating distinct out-of-equilibrium yet long-lived
macroscopic topological textures in 3D confinement. Our hydrodynamic
investigations on DIA processes reveal that the shear-thinning fluid
behavior of LCs and the arrested GO alignments mainly contribute to
the topological richness in DIA. Utilizing the shaping behavior of
GO LCs compared to other conventional linear polymers such as alginate,
we further extend the DIA methodology to design more complex yet highly
controllable functional composites and hybrids. This work thus reveals
the potential to scale production of uniform yet anisotropic materials
with rich topologic textures and tailored composition.
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anisotropic materialsDIA processesfluid characterImpact AssemblyGraphene Oxide Liquid CrystalsLCtopologic texturestopological texturesDIA methodologygraphene oxidetopological richnessnonspherical spacenonspherical morphologiestopological physics3 D confinementscale productiondrop impact assemblynonspherical geometriesmacroscopic topological texturesshear-thinning fluid behaviorgelator bathhydrodynamic investigations
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