Session B41: Nanotechnology
11:15 AM–2:15 PM, Monday, March 5, 2007
Colorado Convention Center Room: 504
Sponsoring Unit:
FIAP
Chair: Eric Dufresne, Yale University
Abstract ID: BAPS.2007.MAR.B41.3
Abstract: B41.00003 : Gas sensors based on single-wall carbon nanotubes and polypyrrole-coated carbon nanotubes
11:39 AM–11:51 AM
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Abstract 
Authors:
Young Wook Chang
(Dept. of Physics, Yonsei University)
Je Seung Oh
(National Core Research Center for Nanomedical Technology, Yonsei University)
Seung Hwan Yoo
(Dept. of Physics, Yonsei University)
Ji Hun Kim
(Dept. of Physics, Yonsei University)
Hyang Hee Choi
(National Core Research Center for Nanomedical Technology, Yonsei University)
Kyung-Hwa Yoo
(Dept. of Physics and National Core Research Center for Nanomedical Technology, Yonsei University)
We have fabricated gas sensors based on single-wall carbon nanotubes and detected NH3 and NO2 gas. At the room temperature, the absorbed gas molecules are not easily detached from the CNT surface. So, we have testes the gas sensor at high temperatures and investigated the temperature dependences of electrical properties of CNTs above the room temperatures. Depending on the gas atmosphere and the temperature, large hysteresis has been observed. In addition, in order to improve the properties of gas sensor, we have electro-deposited polypyrrole onto CNTs and compared with SWNT without polypyrrole.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.B41.3