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提出了采用一对中空的圆柱形电极作为微/纳米流体通道的一部分,对流经该处的电解液的电阻值进行测定,由此刻画溶液的流动速率、浓度及温度等参数的方法。从理论上推导出微流体电解液的电阻值与上述参数之间的关系式,并解释了该方法的测试机理。在此基础上,完成了几类典型的原理性实验,对流动于毫/微米通道中的溶液的温度、流速及浓度等对电阻值的影响进行了测试,结果表明基于电阻测定可以很好地刻画微流体的性能。进一步讨论了将该方法与其他测量措施相结合,以同时确定多种微流体参数的可行性。
The method of using a pair of hollow cylindrical electrodes as part of the micro / nanofluidic channel to measure the resistance of the electrolyte flowing therethrough is proposed to characterize the parameters such as the flow rate, concentration and temperature of the solution. The relationship between the resistance of the microfluidic electrolyte and the above parameters is theoretically deduced and the test mechanism of the method is explained. On this basis, we completed several typical principle experiments to test the influence of the temperature, flow rate and concentration of the solution flowing in the millimicron / micron channel on the resistance value. The results show that the resistance based on the resistance measurement can be well Characterize the performance of microfluidics. Further discuss the feasibility of combining this method with other measurements to simultaneously determine multiple microfluidic parameters.