Lin Shu-Ju, Hung Shih-Hsun, Jeng Jun-Yuan, Guo Tzung-Fang, Lee Gwo-Bin
Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan.
Opt Express. 2012 Jan 2;20(1):583-92. doi: 10.1364/OE.20.000583.
This study presents a novel technology to manipulate micro-particles with the assistance from flexible polymer-based optically-induced dielectrophoretic (ODEP) devices. Bending the flexible ODEP devices downwards or upwards to create convex or concave curvatures, respectively, enables the more effective separation or collection of micro-particles with different diameters. The travel distances of the polystyrene beads of 40 μm diameter, as induced by the projected light in a given time period was increased by ~100%, which were 43.0 ± 5.0 and 84.6 ± 4.0 μm for flat and convex ODEP devices, respectively. A rapid separation or collection of micro-particles can be achieved with the assistance of gravity because the falling polystyrene beads followed the inclination of the downward and upward bent ODEP devices.
本研究提出了一种利用基于柔性聚合物的光诱导介电泳（ODEP）装置辅助来操纵微粒的新技术。将柔性ODEP装置向下或向上弯曲，分别产生凸曲率或凹曲率，能够更有效地分离或收集不同直径的微粒。在给定时间段内，由投射光诱导的直径为40μm的聚苯乙烯珠的移动距离增加了约100%，对于平面和凸面ODEP装置，该距离分别为43.0±5.0μm和84.6±4.0μm。由于下落的聚苯乙烯珠遵循向下和向上弯曲的ODEP装置的倾斜度，借助重力可以实现微粒的快速分离或收集。
