Transport behavior of liquid droplets based on functional liquid crystal surfaces

DOU Yun-jie; WANG Ze-yu; WEI Yang; MA Ling-ling; LU Yan-qing

doi:10.37188/CJLCD.2023-0211

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Transport behavior of liquid droplets based on functional liquid crystal surfaces

Material Physics | 更新时间：2023-10-10

- Transport behavior of liquid droplets based on functional liquid crystal surfaces
- Chinese Journal of Liquid Crystals and Displays Vol. 38, Issue 10, Pages: 1322-1329(2023)
- 作者机构：
  
  1.南京大学固体微结构物理国家重点实验室，现代工程与应用科学学院，江苏南京 210093
- 作者简介：
- 基金信息：
  
  the National Key Research and Development Program of China(2022YFA1405000);National Natural Science Foundation of China(52003115);Natural Science Foundation of Jiangsu Province(BK20212004;BK20200320);Xiaomi Young Scholar Program and Young Elite Scientists Sponsorship Program by CAST(2022QNRC001)
- DOI：10.37188/CJLCD.2023-0211
  CLC：
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DOU Yun-jie, WANG Ze-yu, WEI Yang, et al. Transport behavior of liquid droplets based on functional liquid crystal surfaces. [J]. Chinese Journal of Liquid Crystals and Displays 38(10):1322-1329(2023)
DOI：

DOU Yun-jie, WANG Ze-yu, WEI Yang, et al. Transport behavior of liquid droplets based on functional liquid crystal surfaces. [J]. Chinese Journal of Liquid Crystals and Displays 38(10):1322-1329(2023) DOI： 10.37188/CJLCD.2023-0211.

摘要

基于液晶开放表面的微流体操纵技术是一种利用微流体学原理和微加工技术，在微纳尺度上对液体进行操纵和控制的方法，对新型微流控平台的开发至关重要。本文通过注液光滑表面的理论设计，利用液晶聚合物薄膜的可控制备，开发了取向序各向异性的功能聚合物薄膜，包括向列相聚合膜和近晶相聚合膜。研究表明，与近晶相聚合膜相比，向列相聚合膜在同等条件下，为水滴提供更快的输运速度，比近晶相聚合膜约快1个数量级。近晶相聚合膜和向列相聚合膜对于水滴的输运均具有方向选择性，实现了液滴在液晶功能表面的各向异性输运，为开发基于图案化液晶功能表面的特异性微流控技术奠定了基础。

Abstract

The liquid crystal （LC）-based open surface microfluidic can manipulate the liquid in micro-nano scale by utilizing microfluidics principles and micromachining techniques， which is crucial for developing next generation microfluidic platforms. In this work， rational theoretical design and controlled synthesis are conducted to prepare anisotropic functional polymer films including nematic and smectic LC polymer films. According to our study， the flow of droplets on nematic LC polymer films is an order of magnitude faster than on smectic LC polymer films. Moreover， both the nematic and smectic LC polymer films can trigger orientation-dependent flow velocity of droplets， which realize the anisotropic transports of droplets and thereby lays a foundation for the development of specific microfluidic technology based on patterned LC functional surfaces.

关键词

液晶向列相近晶相液晶聚合物液滴输运

Keywords

liquid crystalnematic phasesmectic phaseliquid crystal polymerdroplet transport

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