Versatile Miniature Tunable Liquid Lenses Using Transparent Graphene Electrodes.
Versatile Miniature Tunable Liquid Lenses Using Transparent Graphene Electrodes.
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DOI：
10.1021/acs.langmuir.5b03407
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
A. Shahini;Jinjun Xia;Zhixian Zhou;Yang Zhao;M. Cheng
中科院分区：
文献类型：
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作者：
A. Shahini;Jinjun Xia;Zhixian Zhou;Yang Zhao;M. Cheng
本文首次提出了以石墨烯为电极的多功能低成本微型液体透镜。通过使用电介质上的电润湿（EWOD）改变液滴曲率来实现可调焦距。离子液体和KCl溶液用作柔性聚四氟乙烯涂覆的PDMS/聚对二甲苯膜顶部的透镜液体。透明且柔性的石墨烯允许可见光的透射以及聚合物膜的大变形，以实现不同透镜设计的要求，并且在不损坏电极的情况下增加视场。对于体积为3 μL的液滴，焦距的可调范围在3 mm和7 mm之间。骨髓树突状细胞的可视化通过具有高分辨率（456 lp/mm）的液体透镜系统展示。
This paper presents, for the first time, versatile and low-cost miniature liquid lenses with graphene as electrodes. Tunable focal length is achieved by changing the droplet curvature using electrowetting on dielectric (EWOD). Ionic liquid and KCl solution are utilized as lens liquid on the top of a flexible Teflon-coated PDMS/parylene membrane. Transparent and flexible, graphene allows transmission of visible light as well as large deformation of the polymer membrane to achieve requirements for different lens designs and to increase the field of view without damaging of electrodes. The tunable range for the focal length is between 3 and 7 mm for a droplet with a volume of 3 μL. The visualization of bone marrow dendritic cells is demonstrated by the liquid lens system with a high resolution (456 lp/mm).