Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2015-08-01

Journal: Micro and Nanosystems

Included Journals: Scopus、EI

Volume: 7

Issue: 1

Page Number: 60-63

ISSN: 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.