3.1.2 Chirality-Selective Fabrication of Carbon Nanotube Gas sensor Using Spin-Column Chromatography and Dielectrophoresis
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 3.1 Carbon Nano Tubes
- Author(s)
- J. Suehiro, M. Fujioka, H. Watanabe, H. Komure, M. Nakano - Kyushu University (Japan)
- Pages
- 251 - 253
- DOI
- 10.5162/IMCS2012/3.1.2
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Carbon nanotube (CNT) gas sensors have received considerable attention because of their utstanding properties. The CNT sensor performance, however, has not been optimized because of the coexistence of CNTs with different electronic properties depending on their chirality. This study demonstrates a chirality-selective fabrication method of the CNT gas sensor using spin-column chromatography and dielectrophoresis (DEP). After passing through three spin-columns, pristine CNTs were separated into three fractions, which contained CNTs with different chiralities. The CNTs in each fraction were trapped on the microelectrodes by DEP to fabricate three CNT gas sensors. Comparison of these CNT gas sensor responses to NO2 gas revealed that the sensor response was dependent on the CNT chirality and could be improved by the chirality separation.