Operational regimes and physics present in optoelectronic tweezers

被引：87
|
作者：
Valley, Justin K. [1 ]
Jamshidi, Arash [1 ]
Ohta, Aaron T. [1 ]
Hsu, Hsan-Yin [1 ]
Wu, Ming C. [1 ]
机构：
[1] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA
来源：
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS | 2008年 / 17卷 / 02期
基金：
美国国家卫生研究院;
关键词：
dielectrophoresis (DEP); electrothermal (ET) flow; light-induced ac electroosmosis (LACE); optoelectronic tweezers (OET);
D O I：
10.1109/JMEMS.2008.916335
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Optoelectronic tweezers (OET) are a powerful light-based technique for the manipulation of micro- and nanoscopic particles. In addition to an optically patterned dielectrophoresis (DEP) force, other light-induced electrokinetic and thermal effects occur in the OET device. In this paper, we present a comprehensive theoretical and experimental investigation of various fluidic, optical, and electrical effects present during OET operation. These effects include DEP, light-induced ac electroosmosis, eiectrothermal flow, and buoyancy-driven How. We present finite-element modeling of these effects to establish the dominant mode for a given set of device parameters and bias conditions. These results are confirmed experimentally and present a comprehensive outline of the operational regimes of the OET device.
引用
收藏
页码：342 / 350
页数：9
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