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Indexed by:期刊论文

Date of Publication:2015-08-01

Journal:Micro and Nanosystems

Included Journals:EI、Scopus

Volume:7

Issue:1

Page Number:60-63

ISSN No.:18764029

Abstract: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.