상세정보
학술지
Use of Nanocomposites to Increase Electrical “gain” in Chemical Sensors
- 저자
- Sara M. C. Vieira, Paul Beecher, Ibraheem Haneef, Florin Udrea, William I. Milne, Manoj A. G. Namboothiry, David L. Carroll, 박종혁, 맹성렬
- 발행일
- 200711
- 출처
- Applied Physics Letters, v.91 no.20, pp.1-3
- ISSN
- 0003-6951
- 출판사
- American Institute of Physics (AIP)
- 협약과제
- 06MB4700, 차세대 고성능 광전자소자 및 스마트 생화학 센서 구현을 위한 IT-BT-NT 융합 핵심기술 개발, 맹성렬
- 초록
- We have investigated chemical sensors by combining silicon-on-insulator complementary-metal-oxide-semiconducting microtechnology with nanotechnology. The sensing materials were single-walled carbon nanotubes and poly (3, 3 -dialkyl-quarterthiophone). The devices containing only nanotubes or pure polymer provided minimal response, whereas the nanocomposite material (1 wt. % of nanotubes in the polymer) provided excellent sensitivity/selectivity to the particular analyte monitored (hydrogen, ammonia, and acetone). We observed that even small amounts of gas doping (10 ppb) resulted in exponential changes in the overall conductivity profile of the nanocomposite sensor, thus anticipating an element of "gain" within the chemical sensor. © 2007 American Institute of Physics.
- KSP 제안 키워드
- Carbon nano-tube(CNT), Gas doping, Metal-oxide(MOX), Nanocomposite materials, Sensing material, Silicon On Insulator(SOI), Single-Walled Carbon Nanotubes(SWCNTs), chemical sensor