Selective differential ammonia gas sensor based on N-doped SWCNT films
| Autor: | Yann Battie, O. Ducloux, Esko I. Kauppinen, Toma Susi, Philippe Thobois, Annick Loiseau |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
ta214
Materials science Ammonia gas ta114 carbon nanotubes ta221 Doping nitrogen doping selectivity Nanotechnology Carbon nanotube Condensed Matter Physics gas sensor Electronic Optical and Magnetic Materials law.invention Chemical engineering law Molecule Electrical measurements Selectivity ta218 Water vapor Sheet resistance |
| Zdroj: | physica status solidi (b). 248:2462-2466 |
| ISSN: | 0370-1972 |
| DOI: | 10.1002/pssb.201100067 |
| Popis: | The sensing performance of a micro-sensor based on a thick film of nitrogen-doped single-walled carbon nanotube (SWCNTs) is compared to a pristine SWCNTs film. Transfer length method analysis is used to extract the film sheet resistance from electrical measurements and reveals that the gas sensing mechanism is mainly attributed to the charge transfer between gas molecules and SWCNTs. We demonstrate that the sensitivity to NH3 can be improved by using a sensor based N-doped SWCNTs films while the sensitivity to NO2 and water vapour is unmodified. These unique gas-sensing properties can be used to develop a new NH3-selective differential gas sensor. |
| Databáze: | OpenAIRE |
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