Operational regimes and physics present in optoelectronic tweezers
Operational regimes and physics present in optoelectronic tweezers
复制标题
DOI：
10.1109/jmems.2008.916335
复制
发表时间：
2008-04-01
影响因子：
2.7
通讯作者：
Wu, Ming C.
中科院分区：
文献类型：
--
作者：
Valley, Justin K.;Jamshidi, Arash;Wu, Ming C.
光电子镊子（OET）是一种强大的基于光的技术，用于操纵微米和纳米级颗粒。除了光学图案化介电泳（DEP）力之外，OET装置中还发生其它光诱导的电动效应和热效应。在本文中，我们提出了一个全面的理论和实验研究的各种流体，光学和电学效应OET操作过程中存在。这些效应包括DEP、光致交流电渗、电热流和浮力驱动的流体。我们提出了这些影响的有限元建模，以建立一组给定的器件参数和偏置条件的主导模式。实验证实了这些结果，并提出了一个全面的轮廓OET设备的操作制度。
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.