Light-Directed Liquid Manipulation in Flexible Bilayer Microtubes
Light-Directed Liquid Manipulation in Flexible Bilayer Microtubes
复制标题
柔性双层微管中的光引导液体操纵
DOI：
10.1002/smll.201901847
复制
发表时间：
2019
期刊：
影响因子：
13.3
通讯作者：
Yanlei Yu
中科院分区：
文献类型：
--
作者：
Bo Xu;Chongyu Zhu;Lang Qin;Jia Wei;Yanlei Yu
柔性微流体系统在可穿戴和植入式医疗应用方面具有潜力。在这些系统中，定向液体输送通常需要机械泵、储气罐和磁性执行器。本文提出了一种在柔性双层微管中进行光定向液体操作的替代策略，该微管由市售支撑层和新设计的含偶氮苯线性液晶共聚物的光变形层组成。在适度的可见光照射下，由于光变形引起的不对称毛细力，限制在柔性微管中的各种液体鼻涕虫在预设的方向上被驱动了很长一段距离。利用柔性双层微管建立了平行阵列、闭环通道和多个微泵的光驱动原型，以实现液体操纵。此外，本文还演示了一种可穿戴设备，该设备可以通过不同的手势连接到手指上进行光导液体运动。这些独特的光可控柔性微管提供了可穿戴微流体的新概念。
Flexible microfluidic systems have potential in wearable and implantable medical applications. Directional liquid transportation in these systems typically requires mechanical pumps, gas tanks, and magnetic actuators. Herein, an alternative strategy is presented for light‐directed liquid manipulation in flexible bilayer microtubes, which are composed of a commercially available supporting layer and the photodeformable layer of a newly designed azobenzene‐containing linear liquid crystal copolymer. Upon moderate visible light irradiation, various liquid slugs confined in the flexible microtubes are driven in the preset direction over a long distance due to photodeformation‐induced asymmetric capillary forces. Several light‐driven prototypes of parallel array, closed‐loop channel, and multiple micropump are established by the flexible bilayer microtubes to achieve liquid manipulation. Furthermore, an example of a wearable device attached to a finger for light‐directed liquid motion is demonstrated in different gestures. These unique photocontrollable flexible microtubes offer a novel concept of wearable microfluidics.