Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fabrication and characteristics of MOSFET protein sensor using gold-black gate

Gold-Black 게이트를 이용한 MOSFET형 단백질 센서의 제조 및 특성

  • Kim, Min-Suk (Department of Electronics, Kyungpook National University) ;
  • Park, Keun-Yong (Department of Electronics, Kyungpook National University) ;
  • Kim, Ki-Soo (Department of Amplied chemistry, Kyungpook National University) ;
  • Kim, Hong-Seok (Department of Amplied chemistry, Kyungpook National University) ;
  • Bae, Young-Seuk (Department of Biochemistry, Kyungpook National University) ;
  • Choi, Sie-Young (Department of Electronics, Kyungpook National University)
  • Published : 2005.05.31
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Abstract

Research in the field of biosensor has enormously increased over the recent years. The metal-oxide semiconductor field effect transistor (MOSFET) type protein sensor offers a lot of potential advantages such as small size and weight, the possibility of automatic packaging at wafer level, on-chip integration of biosensor arrays, and the label-free molecular detection. We fabricated MOSFET protein sensor and proposed the gold-black electrode as the gate metal to improve the response. The experimental results showed that the output voltage of MOSFET protein sensor was varied by concentration of albumin proteins and the gold-black gate increased the response up to maximum 13 % because it has the larger surface area than that of planar-gold gate. It means that the expanded gate allows a larger number of ligands on same area, and makes the more albumin proteins adsorbed on gate receptor.

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References

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