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A novel dispersion control in CE chips by ζ-potential variation using field-effect

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3 Author(s)
Che-Hsin Lin ; Dept. of Mech. & Electro-Mech. Eng., National Sun Yat-sen Univ., Taiwan ; Chia-Yen Lee ; Lung-Ming Fu

The paper proposes a new technique, which varies the zeta potential along the channel walls in the vicinity of the microchannel corners in such as a way as to minimize the effects of turn-induced dispersion within U-shaped separation channels. The results for the folded square U-shaped separation channel indicate that boundary control of the zeta potential by field-effect significantly reduces the band dispersion induced by the 90° turns. Finally, the results confirm that application of the proposed localized zeta potential variation method results in a correction of the band tilting phenomenon and a reduction in the racetrack effect.

Published in:

The 13th International Conference on Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05.  (Volume:2 )

Date of Conference:

5-9 June 2005