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포스터 발표 : 바이오센서 및 바이오칩

The Network Density-Modulated Single-Walled Carbon Nanotube Sensor for the Detection of DNA

초록

영어

Single-walled carbon nanotubes (SWNTs) have attracted considerable attention as a platform material for manufacturing miniaturized label-free biosensors.1 Here, we developed the network density-modulated SWNT sensor for the label-free DNA detection.2 The nanotube networks
with various densities are fabricated via vacuum filtration method and incorporated with two-terminal resistor. The SWNT network-based devices exhibit linear I-V characteristics, resulting in the network density over the percolation threshold. We found that SWNT films having low
network densities giving the conductance of 0.74 × 10-7 < Gbare < 2.00 × 10-7 allow detection of DNA hybridization with higher sensitivities compared with the high density networks. This study show the capability of label-free detection based on the SWNT networks showing metallic
like electrical behavior. [This research was supported by WCU program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (R32-2008-000-10142-0)].

저자정보

  • Sol CHOI Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.
  • Seung Min YOO Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.
  • Youn Kyoung BAEK, Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.
  • Ju Hyun KIM School of Electrical Engineering and Computer Science, KAIST, Daejeon 305-701, Korea.
  • Dae Hwan JUNG Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.
  • Yang Kyu CHOI School of Electrical Engineering and Computer Science, KAIST, Daejeon 305-701, Korea.
  • Sang Yup LEE Department of Chemical & Biomolecular Engineering (BK21 program), KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea.

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