Ms. Jing Xu Profile

Jing Xu

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Proceedings Article | 3 February 2009 Paper

Design and studies of a quadrupolar dielectrophoresis chip integrated with detection electrode

Yonghong Liu, Zhan Zhao, Jing Xu, Cheng Pang, Zhen Fang, Lidong Du

Proceedings Volume 7159, 715902 (2009) https://doi.org/10.1117/12.807029

KEYWORDS: Dielectrophoresis, Electrodes, Particles, Curium, Metals, Microfabrication, Gold, Target detection, Photoresist materials, Microfluidics

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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.

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