The gas sensing performances of gas sensors based on the dielectrophoretically manipulated multi-wall carbon nanotubes with various functionalized groups towards NH3

DOI

10.2991/icitmi-15.2015.17How to use a DOI?

Keywords

Dielectrophoretical manipulation; Multi-wall carbon nanotubes; Functional group modification; Gas sensors; Ammonia

Abstract

Gas sensors based on raw multi-wall carbon nanotubes (raw MWNTs) and functionalized multi-wall carbon nanotubes (MWNTs-x) were fabricated on the chromium-silver-gold microelectrode chips by dielectrophoresis process. The positive dielectrophoresis was observed for the particles of carbon nanotubes. The gas sensing performances of the fabricated gas sensors towards different concentrations of NH3 were tested at room temperature. It was found that the response time, recovery time and sensitivity of gas sensors towards NH3 were increased with the increase of NH3 concentrations. We demonstrated that functionalizing MWNTs does not change the adsorption properties of NH3 on MWNTs. In addition, We conclude that the interactions between MWNTs and NH3 such as surface area and small diameter are influential factors for the gas sensing performances of these gas sensors.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hai-Bo Wang
AU  - Li-Li Feng
AU  - Hui-Ying Chen
PY  - 2015/10
DA  - 2015/10
TI  - The gas sensing performances of gas sensors based on the dielectrophoretically manipulated multi-wall carbon nanotubes with various functionalized groups towards NH3
BT  - Proceedings of the 4th International Conference on Information Technology and Management Innovation
PB  - Atlantis Press
SP  - 91
EP  - 95
SN  - 2352-538X
UR  - https://doi.org/10.2991/icitmi-15.2015.17
DO  - 10.2991/icitmi-15.2015.17
ID  - Wang2015/10
ER  -