Continuous optoelectrowetting for picoliter droplet manipulation

被引：74

作者：

Chiou, P. Y. ^{[1
]}

Park, Sung-Yong ^{[1
]}

Wu, Ming C. ^{[2
,3
]}

机构：

[1] Univ Calif Los Angeles, Dept Mech & Aerosp Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

[3] Univ Calif Los Angeles, Berkeley Sensor & Actuator Ctr, Los Angeles, CA 90095 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 22期

基金：

美国国家科学基金会;

关键词：

amorphous semiconductors; contact angle; dielectric thin films; drops; electrodes; elemental semiconductors; optical modulation; photoconductivity; silicon; wetting;

D O I：

10.1063/1.3039070

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on a continuous optoelectrowetting mechanism enabling continuous high spatial resolution optical modulation of electrowetting effect on a featureless planar photoconductive amorphous silicon surface. Dynamically patterned "virtual electrode" switches voltage between the amorphous silicon layer and the dielectric layer for contact angle modulation. This device is particularly attractive for manipulating picoliter droplets. We have experimentally demonstrated trapping and moving of 10 and 50 pl droplets at a speed of 1 mm/s using a light beam.

引用

页数：3

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