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Electron field emission from single-walled carbon nanotube nonwoven
- Source :
- Chinese Physics. 15:422-427
- Publication Year :
- 2006
- Publisher :
- IOP Publishing, 2006.
-
Abstract
- Field emission from single-walled carbon nanotube (SWNT) nonwoven has been investigated under high vacuum with different vacuum gaps. A low turn-on electric field of 1.05 V/μm is required to reach an emission current density of 10 μA/cm2. An emission current density of 10 mA/cm2 is obtained at an operating electric field of 1.88 V/μm. No current saturation is found even at an emission current of 5 mA. With the vacuum gap increasing from 1 to 10 mm, the turn-on field decreases monotonically from 1.21 to 0.68 V/μm, while the field amplification is augmented. The good field-emission behaviour is ascribed to the combined effects of the intrinsic field emission of SWNT and the waved topography of the nonwoven.
- Subjects :
- Materials science
business.industry
Astrophysics::High Energy Astrophysical Phenomena
Ultra-high vacuum
General Physics and Astronomy
Nanotechnology
Carbon nanotube
Vacuum gap
law.invention
Field electron emission
law
Electric field
Optoelectronics
business
Saturation (magnetic)
Current density
Astrophysics::Galaxy Astrophysics
Subjects
Details
- ISSN :
- 17414199 and 10091963
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Chinese Physics
- Accession number :
- edsair.doi...........ef7b0c04190219698d5fa026ff9811e1