Micro-droplet driven digital mirofluidics device with crescent electrode

XU Xiao-wei; CHEN Li-guo; SUN Li-ning

doi:10.3788/OPE.20132110.2557

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Micro-droplet driven digital mirofluidics device with crescent electrode

更新时间：2020-08-12

- Micro-droplet driven digital mirofluidics device with crescent electrode
- Optics and Precision Engineering Vol. 21, Issue 10, Pages: 2557-2565(2013)
- 作者机构：
  
  苏州大学机器人与微系统研究中心，江苏苏州 215021
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132110.2557
  CLC： TP273;TQ320.66
- Received：15 March 2013，
  
  Revised：09 May 2013，
  
  Published Online：19 October 2012，
  
  Published：15 October 2013
- 稿件说明：
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许晓威陈立国孙立宁. 半月形电极微液滴驱动微流控芯片[J]. 光学精密工程, 2013,21(10): 2557-2565

XU Xiao-wei CHEN Li-guo SUN Li-ning. Micro-droplet driven digital mirofluidics device with crescent electrode[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2557-2565
许晓威陈立国孙立宁. 半月形电极微液滴驱动微流控芯片[J]. 光学精密工程, 2013,21(10): 2557-2565 DOI： 10.3788/OPE.20132110.2557.

XU Xiao-wei CHEN Li-guo SUN Li-ning. Micro-droplet driven digital mirofluidics device with crescent electrode[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2557-2565 DOI： 10.3788/OPE.20132110.2557.

摘要

针对目前数字微流控芯片驱动电压比较高的问题，本文对比传统的驱动电极结构，研制了一种可以降低驱动电压的半月形驱动电极数字微流控芯片。首先，基于介电湿润原理，分析微液滴所受介电湿润力和微液滴接触圆上有效三相接触线所对应弦长的关系。接着，对比分析了传统的方形、叉齿形驱动电极与提出的半月形驱动电极上液滴有效三相接触线所形成的弦长大小；分析得出3种驱动电极结构中半月形驱动电极所形成的有效弦长最大，从而表明半月形驱动电极的数字微流控芯片上介电驱动力最大。最后，利用设计制作的3种驱动电极介电湿润芯片分别实验验证驱动液滴的效果。结果表明，所研制的半月形驱动电极数字微流控芯片的最小驱动电压分别比方形和叉齿形驱动电极芯片降低了约37%和67%。另外，当有效驱动电压为60 V时，半月形驱动电极芯片上2 L去离子水微液滴的速度约为10 cm/s，分别是方形与叉齿形驱动电极芯片上液滴速度的3倍和2倍。得到的实验数据证明了半月形驱动电极数字微流控芯片实现了降低芯片驱动电压的目的。

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references

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