| Growth dynamics of nanoplatelet liquid crystals by directionally drying colloidal suspensions in a confined channel |
| Sui JZ(隋济泽)
|
| 通讯作者 | Sui, Jize(suijize@imech.ac.cn)
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| 发表期刊 | PHYSICS OF FLUIDS
 |
| 2021-12-01
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| 卷号 | 33期号:12页码:13 |
| ISSN | 1070-6631
|
| 摘要 | Unidirectional solvent evaporation has been increasingly concerned as a versatile microfluidic agent in manipulating the self-assembly dynamics of shape anisotropic colloids by precisely governing a confined nanofluid flow in a microcell. Here we develop a theoretical framework upon unidirectional drying-induced growth of nematic liquid crystals (LC) in nanoplatelet suspension confined to a Hele-Shaw (H-S) channel. The nematic order-dependent permeability assembled in modified Darcy's law and the interactions between nanoplatelets for nematic LC are both explicitly incorporated in a confined nanofluid flow. The growth dynamics of nematic LC that is highly correlated with drying rate (drying Peclet number), nanoplatelet aspect ratio, and geometric confinement have been rationalized by our numerical measurements. Unlike the spherical colloids, the nematic LC grows nonlinearly over time indicating a time-dependent instantaneous growth velocity. The final length of LC, when subjected to an enhanced drying rate, is seen to be compressed toward the drying end, but its time-averaged growth velocity increases significantly. Besides, the LC formed by the thicker nanoplatelets gets the shorter final length, while whether its average growth velocity is affected by nanoplatelet types depends on the drying rate. Importantly, we confirm a noticeable promotion in the growth of LC as the enhanced geometric confinement is imposed. A state diagram we produce suggests a universal signature of enhancement in solvent drying flux with enhanced confinement. However, our results highlight the favorable water retention in nanoplatelet nematic LC with compacted layered architecture prevailing over the spherical colloids deposits with the porous percolation architecture. |
| DOI | 10.1063/5.0074668
|
| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000729291000001
|
| 关键词[WOS] | FILMS
; SOLIDIFICATION
; EVAPORATION
; KINETICS
; FRONTS
; RING
; FLOW
|
| WOS研究方向 | Mechanics
; Physics
|
| WOS类目 | Mechanics
; Physics, Fluids & Plasmas
|
| 资助项目 | National Natural Science Foundation of China for Young Scientists[21903003]
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| 项目资助者 | National Natural Science Foundation of China for Young Scientists
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| 论文分区 | 一类/力学重要期刊
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| 力学所作者排名 | 1
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| RpAuthor | Sui, Jize
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/87979
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| 专题 | 非线性力学国家重点实验室
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| 作者单位 | Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
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推荐引用方式
GB/T 7714 |
Sui JZ. Growth dynamics of nanoplatelet liquid crystals by directionally drying colloidal suspensions in a confined channel[J]. PHYSICS OF FLUIDS,2021,33,12,:13.
|
| APA |
隋济泽.(2021).Growth dynamics of nanoplatelet liquid crystals by directionally drying colloidal suspensions in a confined channel.PHYSICS OF FLUIDS,33(12),13.
|
| MLA |
隋济泽."Growth dynamics of nanoplatelet liquid crystals by directionally drying colloidal suspensions in a confined channel".PHYSICS OF FLUIDS 33.12(2021):13.
|
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