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液晶微滴的温度可切换的自动推进活动

Manoj Kumar¹, Siddharth Sane¹, Aniruddh Murali¹

¹Simons Centre for the Study of Living Machines, National Centre for Biological Sciences, Tata Institute of Fundamental Research, GKVK Campus, Bellary Road, Bangalore 560065, India. manojk@ncbs.res.in.

|April 17, 2025

概括

研究人员使用液晶液滴 (LC) 开发了可切换的微游泳器. 这些微游泳器只有在较高温度 (≥33.5°C) 时才具有运动性,并且可以被可逆控制,显示出可调节的微机器人潜力.

科学领域:

软物质物理学软物质物理学
材料科学材料科学材料科学
微流体学微流体学

背景情况:

微游泳器为有针对性的传送和传感应用提供了潜力.
通过外部刺激控制微游泳者的运动性对于它们的实际使用至关重要.
液晶 (LCs) 呈现出独特的相位过渡,可用于动态材料特性.

研究的目的:

为了设计一个基于液晶乳液滴的可切换微游泳器.
为了研究控制滴滴运动的温度依赖的相位过渡.
探索这些微游泳者的可逆性和定向记忆.

主要方法:

使用液晶形相物质制造乳液滴.
温度控制,以诱导性,阴性和同otropic 阶段之间的相变.
滴滴运动,化学场和水力动力学场的表征.
在不同的表面活性剂度和温度中系统地绘制移动性的地图.

主要成果:

液晶水滴仅在它们的阴性和同otropic 阶段 (T ≥33.5 °C) 进行自动推进.
运动性是完全可逆的,液滴在加热-冷却周期中表现出持续的运动和定向记忆.
游泳仅在高温和足够的表面活性剂度下观察到,在涂层 - 带膜过渡以上.

结论:

液晶乳液滴滴可以作为可切换的微游泳器起作用.
温度作为可靠的外部触发器来控制微游泳者的活动.
这项工作表明了基于LC的微结构在开发可调节的微机器人方面的潜力.

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