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Gate-Controlled Microfluidic Chamber With Magnetic Bead for DNA Sequencing-by-Synthesis Technology

[+] Author Affiliations
Hesaam Esfandyarpour, Ronald W. Davis

Stanford University, Palo Alto, CA

Paper No. ICNMM2007-30119, pp. 163-167; 5 pages
  • ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 5th International Conference on Nanochannels, Microchannels, and Minichannels
  • Puebla, Mexico, June 18–20, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4272-X | eISBN: 0-7918-3800-5
  • Copyright © 2007 by ASME


In this paper we present a novel microfluidic platform for DNA sequencing-by-synthesis methods (e.g. pyrosequencing). The proposed platform is based on the valve-controllable PDMS channel technology with DNA-coated magnetic beads. The encapsulation of the reaction of DNA polymerization in picoliter-sized wells provides for excellent isolation and control for detection. This separation prevents cross-talk amongst neighbor reactors which is one of the most limitations for higher integration of the current technologies. Through application of an external magnetic field the beads can be allocated with better accuracy. In addition this property can help mixing for the reaction. The proposed system is useful for a number of other bio-species detection and sorting templates. This paper illustrates the design and experimental results of a primary template as well as different advantages and potential applications of the Gate-Controlled Magnetic Bead (GCMB) platform in the world of DNA sequencing and genetics.

Copyright © 2007 by ASME



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