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为寻求一种驱动电导率(大于0.02S/m)溶液的新方法,探讨了利用交流电热效应驱动高电导率微流体.根据交流电热效应理论,建立了交流电热粒子诱捕物理模型,利用仿真软件FEMLAB对其进行仿真分析研究,并通过实验对其进行验证.实验结果表明:利用特定的微电极芯片结构和交流电热效应,能驱动流体电导率高达1.53S/m的微流体,实现了在低电势下的粒子诱捕.利用交流电热效应驱动微流体,不仅能够实现对微粒的诱捕,而且输入信号电势低,受微流体影响小,容易与芯片集成.研究结果为设计交流电热效应芯片实验室提供了参考依据.
In order to find a new method to drive the conductivity (greater than 0.02S / m) solution, the use of alternating current heating effect to drive high conductivity microfluid was discussed.According to the theory of AC heating effect, a physical model of AC heating particle trap was established. Using FEMLAB It is simulated and analyzed, and verified by experiments.The experimental results show that the microfluid can be driven to 1.53S / m with a specific microelectrode chip structure and AC heating effect, Particle trapping.Using the AC heating effect to drive the microfluid, not only the trapping of the particles but also the low input signal potential, which is less influenced by the microfluid, is easy to integrate with the chip.The research results provide references for the design of AC heating chip lab.