基于液晶功能表面的液滴输运研究  

Transport behavior of liquid droplets based on functional liquid crystal surfaces

作　　者：窦韵洁 王泽宇 魏阳 马玲玲[1] 陆延青[1] DOU Yun-jie;WANG Ze-yu;WEI Yang;MA Ling-ling;LU Yan-qing(National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093,China)

机构地区：[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

出　　处：《液晶与显示》2023年第10期1322-1329,共8页Chinese Journal of Liquid Crystals and Displays

基　　金：国家重点研发计划(No.2022YFA1405000);国家自然科学基金(No.52003115);江苏省自然科学基金(No.BK20212004,No.BK20200320);小米公益基金会小米青年学者-科技创新奖和中国科协青年人才托举工程(No.2022QNRC001)。

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。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 

分 类 号：O734[理学—晶体学] O753.2