Electrical Breakdown Gas Detector Featuring Carbon Nanotube Array Electrodes
| Autor: | Theodorian Borca-Tasciuc, Seongyul Kim, Pulickel M. Ajayan, Nikhil Koratkar, Sunil K. Pal |
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| Rok vydání: | 2008 |
| Předmět: |
Auxiliary electrode
Materials science business.industry Biomedical Engineering Electrical breakdown chemistry.chemical_element Bioengineering General Chemistry Carbon nanotube Condensed Matter Physics Anode law.invention Nickel chemistry law Electrode Optoelectronics General Materials Science Gas detector business Helium |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 8:416-419 |
| ISSN: | 1533-4880 |
| Popis: | We demonstrate here detection of dichloro-difluoro-methane and oxygen in mixtures with helium using a carbon nanotube electrical breakdown sensor device. The sensor is comprised of an aligned array of multiwalled carbon nanotubes deposited on a nickel based super-alloy (Inconel 600) as the anode; the counter electrode is a planar nickel sheet. By monitoring the electrical breakdown characteristics of oxygen and dichloro-difluoro-methane in a background of helium, we find that the detection limit for dichloro-difluoro-methane is approximately 0.1% and the corresponding limit for oxygen is approximately 1%. A phenomenologigal model is proposed to describe the trends observed in detection of the two mixtures. These results indicate that carbon nanotube based electrical breakdown sensors show potential as end detectors in gas-chromatography devices. |
| Databáze: | OpenAIRE |
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