Improved field emission from multiwall carbon nanotubes with nano-size defects produced by ultra-low energy ion bombardment
Multiwalled carbon nanotubes were irradiated with ultra-low energy (few eV) nitrogen and hydrogen ions using a microwave discharge. These ultra-low energy plasma-ions remain confined to the nanotube walls, transferring their maximum energy to the carbon atoms, and produce extraordinary structural ch...
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| Veröffentlicht in: | Carbon (New York) 2011-11, Vol.49 (14), p.4760-4766 |
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| container_title | Carbon (New York) |
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| creator | Hazra, Kiran S. Koratkar, Nikhil A. Misra, Devi S. |
| description | Multiwalled carbon nanotubes were irradiated with ultra-low energy (few eV) nitrogen and hydrogen ions using a microwave discharge. These ultra-low energy plasma-ions remain confined to the nanotube walls, transferring their maximum energy to the carbon atoms, and produce extraordinary structural changes to the carbon nanotube pillars as well as within the carbon nanotubes. Conical shaped emitters and nanotube structures with nano-defects are produced that exhibit remarkable field emission with ultra-low turn-on electric field (∼0.16
V/μm) and a >300-fold increase in the maximum emission current density compared to non-irradiated nanotubes. Doping of nitrogen is also identified due to such irradiation processes. |
| doi_str_mv | 10.1016/j.carbon.2011.06.085 |
| format | Article |
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| subjects | Carbon Carbon nanotubes Cross-disciplinary physics: materials science rheology Exact sciences and technology Field emission Fullerenes and related materials diamonds, graphite Irradiation Materials science Multi wall carbon nanotubes Nanocomposites Nanomaterials Nanostructure Physics Specific materials |
| title | Improved field emission from multiwall carbon nanotubes with nano-size defects produced by ultra-low energy ion bombardment |
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