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Simultaneous Dielectrophoretic Separation and Impedimetric Detection of Microbeads using Interdigitated Electrodes Array

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3 Author(s)
Zhiwei Zou ; MicroSystems and BioMEMS Laboratory, Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA ; Soo-Hyun Lee ; Chong H. Ahn

This paper presents a polymer microfluidic biochip integrated with interdigitated electrodes arrays (IDAs), which is used for simultaneous separation, accumulation, and detection of microbeads using dielectrophoresis (DEP) and electrical impedance spectroscopy (EIS) methods. The DEP response of silica microspheres has been characterized, and microspheres with different sizes (1.8 mum and 3.5 mum) have been successfully separated and individually trapped in different microchambers with IDAs. Simultaneously, the impedance variation caused by captured microspheres at IDAs has been analyzed.

Published in:

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference

Date of Conference:

10-14 June 2007