P1.7.15 Design of a highly sensitive and selective C2H5OH sensor using p-type Co3O4 nanofibers
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.7 Nanostructured Metal Oxide-based Sensors
- Author(s)
- J. Yoon, J. Choi, J. Lee - Department of Materials Science and Engineering Korea University (Republic of Korea)
- Pages
- 1099 - 1101
- DOI
- 10.5162/IMCS2012/P1.7.15
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
The Co3O4 nanofibers were prepared by electrospinning of solution containing Co-nitrate, N,N-dimethylformamide, and polyvinylpyrrolidone and subsequent heat treatment at 500, 600, and 700°C. The response to 100 ppm C2H5OH of Co3O4 nanofibers was significantly higher than those to 100 ppm CO, C3H8, and H2 in all three sensors. In particular, the Co3O4 nanofibers heat-treated at 500 and 600°C showed higher response and selectivity to C2H5OH. The variation of gas sensing characteristics were explained and discussed in relation to the gas sensing mechanism of a p-typesemiconductor and the morphology ofspecimens.