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PCR in a silicon microstructure

P Wilding1, M A Shoffner, L J Kricka

  • 1Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia 19104.

Clinical Chemistry
|September 1, 1994
PubMed
Summary
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New silicon devices, called PCRChips, enable efficient polymerase chain reaction (PCR) amplification. These microfluidic devices utilize silicon

Area of Science:

  • Biotechnology
  • Microfluidics
  • Materials Science

Background:

  • Polymerase chain reaction (PCR) is a fundamental molecular biology technique.
  • Traditional PCR methods require bulky thermal cyclers.
  • Miniaturization of PCR devices offers potential for faster and more portable applications.

Purpose of the Study:

  • To develop novel silicon-based microdevices for performing polymerase chain reaction (PCR).
  • To evaluate the efficiency and performance of these microdevices compared to conventional thermal cyclers.

Main Methods:

  • Photolithography and etching were used to fabricate microchambers and channels on silicon chips.
  • Silicon chips were capped with Pyrex glass to form sealed microdevices (PCRChips).
  • Thermal cycling was performed using a computer-controlled Peltier heater-cooler system.

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Main Results:

  • Microdevices with volumes of 5.0-10 microL were successfully fabricated.
  • Efficient fluid flow was achieved within the microchannels and microchambers.
  • Successful DNA amplification was demonstrated and validated via gel electrophoresis.

Conclusions:

  • Silicon-based microdevices (PCRChips) are effective for polymerase chain reaction (PCR).
  • The high surface area to volume ratio and thermal properties of silicon enhance PCR efficiency.
  • These devices offer advantages for miniaturized and potentially portable PCR applications.