| 학회 |
한국고분자학회 |
| 학술대회 |
2006년 봄 (04/06 ~ 04/07, 일산킨텍스) |
| 권호 |
31권 1호 |
| 발표분야 |
광/전 기능 고분자-바이오 융합기술 심포지움 |
| 제목 |
Carbon nanotube transistors for ultra-highly sensitive biorecognition systems |
| 초록 |
Highly sensitive single walled carbon nanotube-field effect transistor (SWNT-FET) devices which detect protein adsorptions and specific protein-protein interactions at 1 pM concentrations have been achieved. The detection limit has been improved by 104times comparing tothe devices fabricated by photolithography. The substantially increased sensitivity is mainly due to the increased Schottky contact area which accommodates relatively more numbers of proteins even at very low concentration. The augmentednumber of proteins adsorbed on a device induces instant modulation of the work function of metal contact electrodes, which eventually changes the conductance of the device. Such devices have been attained by addressing metal electrodes on network type SWNTs using a shadow mask on a tilted angle sample stage. The shadow mask allows metals to penetrate underneath the mask efficiently, therefore to form thin and wide Schottky contact area on SWNT channels. |
| 저자 |
최희철 |
| 소속 |
포항공과대 |
| 키워드 |
carbon nanotube; nanotransistor; label-free detection; nanobio sensor; Schottky contact region
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| E-Mail |
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