Field ionization detection of helium using a planar array of carbon nanotubes
In this work we demonstrate the field ionization of neutral helium using a carbon nanotube forest in a parallel-plate detector geometry. The nanotube forest was grown using plasma-enhanced chemical vapor deposition on a silicon substrate. With a high positive voltage applied to the nanotubes, the me...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/13515 |
| _version_ | 1848748367716286464 |
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| author | O’Donnell, Kane Fahy, A. Barr, M. Allison, W. Dastoor, P. |
| author_facet | O’Donnell, Kane Fahy, A. Barr, M. Allison, W. Dastoor, P. |
| author_sort | O’Donnell, Kane |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this work we demonstrate the field ionization of neutral helium using a carbon nanotube forest in a parallel-plate detector geometry. The nanotube forest was grown using plasma-enhanced chemical vapor deposition on a silicon substrate. With a high positive voltage applied to the nanotubes, the measured ion current was directly correlated with the helium partial pressure. Moreover, we show that multiple nanotubes act as field ionisation sources suggesting that, with careful nanotube engineering, significantly larger numbers of nanotubes should be able to contribute to the measured current, paving the way for high-efficiency, spatially resolved field ionization detection. |
| first_indexed | 2025-11-14T07:03:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-13515 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:03:55Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-135152017-09-13T15:01:41Z Field ionization detection of helium using a planar array of carbon nanotubes O’Donnell, Kane Fahy, A. Barr, M. Allison, W. Dastoor, P. In this work we demonstrate the field ionization of neutral helium using a carbon nanotube forest in a parallel-plate detector geometry. The nanotube forest was grown using plasma-enhanced chemical vapor deposition on a silicon substrate. With a high positive voltage applied to the nanotubes, the measured ion current was directly correlated with the helium partial pressure. Moreover, we show that multiple nanotubes act as field ionisation sources suggesting that, with careful nanotube engineering, significantly larger numbers of nanotubes should be able to contribute to the measured current, paving the way for high-efficiency, spatially resolved field ionization detection. 2012 Journal Article http://hdl.handle.net/20.500.11937/13515 10.1103/PhysRevB.85.113404 American Physical Society restricted |
| spellingShingle | O’Donnell, Kane Fahy, A. Barr, M. Allison, W. Dastoor, P. Field ionization detection of helium using a planar array of carbon nanotubes |
| title | Field ionization detection of helium using a planar array of carbon nanotubes |
| title_full | Field ionization detection of helium using a planar array of carbon nanotubes |
| title_fullStr | Field ionization detection of helium using a planar array of carbon nanotubes |
| title_full_unstemmed | Field ionization detection of helium using a planar array of carbon nanotubes |
| title_short | Field ionization detection of helium using a planar array of carbon nanotubes |
| title_sort | field ionization detection of helium using a planar array of carbon nanotubes |
| url | http://hdl.handle.net/20.500.11937/13515 |