Optically actuated thermocapillary movement of gas bubbles on an absorbing substrate
Optically actuated thermocapillary movement of gas bubbles on an absorbing substrate
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DOI：
10.1063/1.2771091
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发表时间：
2007-08-13
影响因子：
4
通讯作者：
Wu, Ming C.
中科院分区：
文献类型：
--
作者：
Ohta, Aaron T.;Jamshidi, Arash;Wu, Ming C.
作者展示了微流体应用中气泡的光学操纵机制。硅油介质中的气泡通过非晶硅薄膜中激光吸收产生的热毛细力来操纵。与先前的光学控制热驱动气泡运动的演示相反，可以使用透明液体，因为热梯度是由非晶硅衬底中的激光吸收形成的，而不是在液体中。各种各样的气泡的体积范围从19 pl到23 nl的运输速度高达1.5 mm/s的测量。(C)2007年，美国物理学会。
The authors demonstrate an optical manipulation mechanism of gas bubbles for microfluidic applications. Air bubbles in a silicone oil medium are manipulated via thermocapillary forces generated by the absorption of a laser in an amorphous silicon thin film. In contrast to previous demonstrations of optically controlled thermally driven bubble movement, transparent liquids can be used, as the thermal gradient is formed from laser absorption in the amorphous silicon substrate, and not in the liquid. A variety of bubbles with volumes ranging from 19 pl to 23 nl was transported at measured velocities of up to 1.5 mm/s. (C) 2007 American Institute of Physics.