Experimental and numerical investigations into high-voltage pulsed DC electric fields for enhancing CE chip performance

Jing Hui Wang, Meng Ku Chi, Lung Ming Fu, Che Hsin Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a simple method to enhance the separation efficiency of DNA biosamples in a chip-based capillary electrophoresis system utilizing high-voltage pulsed DC electric fields. Since the average power consumption is reduced by the pulse electric fields, the Joule heating effect is significantly reduced. The experimental and numerical investigations commence by separating a mixed sample comprising two fluoresceins with virtually identical physical properties, namely Rhodamine B and Rhodamine 6G. It is found that the level of separation is approximately 2.1 times higher than that achieved using a conventional DC electric field of the same intensity. The performance of the proposed method is further evaluated by separating a DNA sample of Rae III digested ølX-174 ladder. Results indicate the separation level of the two neighboring peaks of 5a and 5b in the DNA marker is as high as 1.3 which is extremely difficult to be achieved using a conventional capillary electrophoresis scheme. The improved separation performance of the proposed pulsed DC electric field approach is attributed to a lower Joule heating effect as a result of a lower average power input and the opportunity for heat dissipation during the zerovoltage stage of the pulse cycle. CE separation using highfrequency DC pulse electric fields can be an even simple and efficient way to control the Joule heat in the separation channel during separation.

Original languageEnglish
Title of host publication4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
Pages726-730
Number of pages5
DOIs
Publication statusPublished - 2009 Oct 12
Event4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009 - Shenzhen, China
Duration: 2009 Jan 52009 Jan 8

Publication series

Name4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009

Other

Other4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
CountryChina
CityShenzhen
Period09-01-0509-01-08

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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    Wang, J. H., Chi, M. K., Fu, L. M., & Lin, C. H. (2009). Experimental and numerical investigations into high-voltage pulsed DC electric fields for enhancing CE chip performance. In 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009 (pp. 726-730). [5068681] (4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009). https://doi.org/10.1109/NEMS.2009.5068681