Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fabrication of a polymerase chain reaction micro-reactor using infrared heating

  • Im, Ki-Sik (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Eun, Duk-Soo (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Kong, Seong-Ho (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Shin, Jang-Kyoo (School of Electronic & Electrical Engineering, Kyungpook National University) ;
  • Lee, Jong-Hyun (School of Electronic & Electrical Engineering, Kyungpook National University)
  • Published : 2005.09.30
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Abstract

A silicon-based micro-reactor to amplify small amount of deoxyribonucleic acid (DNA) has been fabricated using micro-electro-mechanical systems (MEMS) technology. Polymerase chain reaction (PCR) of DNA requires a precise and rapid temperature control. A Pt sensor is integrated directly in the chamber for real-time temperature measurement and an infrared lamp is used as external heating source for non-contact and rapid heating. In addition to the real-time temperature sensing, PCR needs a rapid thermocycling for effective PCR. For a fast thermal response, the thermal mass of the reactor chamber is minimized by removal of bulk silicon volume around the reactor using double-side KOH etching. The transparent optical property of silicon in the infrared wavelength range provides an efficient absorption of thermal energy into the reacting sample without being absorbed by silicon reactor chamber. It is confirmed that the fabricated micro-reactor could be heated up in less than 30 sec to the denaturation temperature by the external infrared lamp and cooled down in 30 sec to the annealing temperature by passive cooling.

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References

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