MICROCHIP CAPILLARY ELECTROPHORESIS DEVICE FOR AMPEROMETRIC DETECTION OF DNA WITH REDOX INTERCALATION

Rohit Chand, You-Cheol Jang, Sandeep Kumar Jha, Yong-Sang Kim

2011

Abstract

Microfabricated biochips are very efficient platforms for analysis of biologically important molecules such as DNA, RNA, enzymes, antibodies etc. These devices requires sample in micro/nano volume and produces faster and better results. For these reasons, we fabricated a simple, disposable microfluidic device for amperometric detection of DNA intercalated with methylene blue redox dye. The devices were fabricated using conventional photolithographic method. The microchannels were laid in PDMS using negative molding. The microchannel was 2 cm in length while the height and thickness were 250 µm and 200 µm respectively. The electrodes used for electrophoretic separation and amperometric detection were made of gold and were deposited by thermal evaporation on glass substrate. For the detection of DNA, fish sperm DNA was intercalated with methylene blue as an analyte. The cyclic voltammograms of free methylene blue and those of different concentrations of DNA intercalated with same amount of methylene blue was obtained in this study. The intercalated DNA was then injected in the sample reservoir of fabricated device and subjected to a separation electric field. The i-t curve was monitored for this process. The electropherograms thus obtained suggested a possibility of rapid detection of DNA with high sensitivity and reproducibility.

Paper Citation

in Harvard Style

Chand R., Jang Y., Jha S. and Kim Y. (2011). MICROCHIP CAPILLARY ELECTROPHORESIS DEVICE FOR AMPEROMETRIC DETECTION OF DNA WITH REDOX INTERCALATION . In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011) ISBN 978-989-8425-37-9, pages 284-287. DOI: 10.5220/0003290802840287

in Bibtex Style

@conference{biodevices11,
author={Rohit Chand and You-Cheol Jang and Sandeep Kumar Jha and Yong-Sang Kim},
title={MICROCHIP CAPILLARY ELECTROPHORESIS DEVICE FOR AMPEROMETRIC DETECTION OF DNA WITH REDOX INTERCALATION},
booktitle={Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011)},
year={2011},
pages={284-287},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003290802840287},
isbn={978-989-8425-37-9},
}

in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011)
TI - MICROCHIP CAPILLARY ELECTROPHORESIS DEVICE FOR AMPEROMETRIC DETECTION OF DNA WITH REDOX INTERCALATION
SN - 978-989-8425-37-9
AU - Chand R.
AU - Jang Y.
AU - Jha S.
AU - Kim Y.
PY - 2011
SP - 284
EP - 287
DO - 10.5220/0003290802840287