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论文类型：期刊论文

发表时间：2015-08-01

发表刊物：Micro and Nanosystems

收录刊物：EI、Scopus

卷号：7

期号：1

页面范围：60-63

ISSN号：18764029

摘要：We present the use of impedance monitoring to determine the geometrical characteristics and the ionic concentration of droplets in a microchannel. A compact impedance monitoring system is developed based on an embedded computer that can provide an adjustable excitation signal from 2 KHz to 2 MHz. Aqueous droplets are continuously formed by hydrodynamic focusing and then directed into a primary channel for monitoring with embedded electrodes in a microfluidic chip. With the monitoring system, the correlation between the electrical amplitude and the ionic concentration in droplets is investigated and the correlation coefficient is 0.98. Moveover ? 2015 Bentham Science Publishers.