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Proceedings Paper

Design and studies of a quadrupolar dielectrophoresis chip integrated with detection electrode
Author(s): Yonghong Liu; Zhan Zhao; Jing Xu; Cheng Pang; Zhen Fang; Lidong Du
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Paper Abstract

This paper reports the design and experimental analysis of dielectrophoretic traps composed of four microfabricated gold electrodes excited in a quadrupolar fashion surrounding the electrodes with novel geometries for object detection. Implemented with a simple single-layer metal process, our microchip device makes the quadrupolar collection electrodes and detecting electrodes coplanar. Our scheme could not only make the collection system and the detection system in a chip integrated more easily, but provide possibility to synchronize the two systems and shorten response time. It is found that, at the low medium conductivities used, the existence of annular or parallel track detecting electrodes can hardly influence the separation efficiency, which shows that it is possible to drive targets to the object region rapidly by dielectrophoretic force while all the electrodes within a whole chip are coplanar. Dielectrophoresis effects of colloidal polystyrene particle are enhanced increasing the frequency of stimulating electric field.

Paper Details

Date Published: 3 February 2009
PDF: 5 pages
Proc. SPIE 7159, 2008 International Conference on Optical Instruments and Technology: MEMS/NEMS Technology and Applications, 715902 (3 February 2009); doi: 10.1117/12.807029
Show Author Affiliations
Yonghong Liu, Institute of Electronics (China)
Chinese Academy of Sciences Postgraduate College (China)
Zhan Zhao, Institute of Electronics (China)
Jing Xu, Institute of Electronics (China)
Chinese Academy of Sciences Postgraduate College (China)
Cheng Pang, Institute of Electronics (China)
Chinese Academy of Sciences Postgraduate College (China)
Zhen Fang, Institute of Electronics (China)
Lidong Du, Institute of Electronics (China)
Chinese Academy of Sciences Postgraduate College (China)


Published in SPIE Proceedings Vol. 7159:
2008 International Conference on Optical Instruments and Technology: MEMS/NEMS Technology and Applications

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