We report an optical actuation mechanism, floating electrode optoelectronic tweezers (FEOET). FEOET enables light-driven transport of aqueous droplets immersed in electrically insulating oil on a featureless photoconductive glass layer with direct optical images. We demonstrate that a 681 μm de-ionized water droplet immersed in corn oil medium is actuated by a 3.21 μW laser beam with an average intensity as low as 4.08 μW∕mm2 at a maximum speed of 85.1 μm∕s on a FEOET device. FEOET provides a promising platform for massively parallel droplet manipulation with optical images on low cost, silicon-coated glass. The FEOET device structure, fabrication, working principle, numerical simulations, and operational results are presented in this letter.
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机译：我们报告了一种光学驱动机制，即浮动电极光电镊子（FEOET）。 FEOET能够以光驱动的方式将浸没在电绝缘油中的水液滴带到无特征的光电导玻璃层上，并具有直接光学图像。我们证明，浸入玉米油介质中的681μm去离子水滴是由3.21μW激光束驱动的，其平均强度低至4.08μW∕ mm 2 ，最大速度为85.1μm在FEOET设备上。 FEOET为低成本，硅涂层玻璃上的光学图像大规模并行液滴控制提供了一个有前途的平台。在这封信中介绍了FEOET设备的结构，制造，工作原理，数值模拟和操作结果。
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