Electron emission characteristics of wet spun carbon nanotube fibers

Wet spun carbon nanotube fibers were characterized using both field emission and electron energy distribution measurements. Fowler-Nordheim analysis of the field emission results showed that the carbon fibers demonstrated a large effective emission area, 2 x 10-12 m2, which resulted in a reduced bri...

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Bibliographic Details
Published in:AIP advances 2019-06, Vol.9 (6), p.065319-065319-5
Main Authors: Back, T. C., Gruen, G., Park, J., Murray, P. T., Ludwick, J., Cahay, M., Fairchild, S. B.
Format: Article
Language:English
Subjects:
Brightness
Carbon
Carbon fibers
Carbon nanotubes
Electron emission
Electron energy distribution
Emission analysis
Emittance
Emitters
Emitters (electron)
Field emission
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Summary:Wet spun carbon nanotube fibers were characterized using both field emission and electron energy distribution measurements. Fowler-Nordheim analysis of the field emission results showed that the carbon fibers demonstrated a large effective emission area, 2 x 10-12 m2, which resulted in a reduced brightness of 1.84 x 1010 A/m2/sr/V. By considering the emission and number of carbon nanotube emitters it can be shown that the brightness is consistent with previous reports for single nanotube emitters. Additionally, using the effective emission area determined from the Fowler-Nordheim analysis an emittance value around 0.70 μm was found. These characteristics are useful metrics in determining the applicability of using wet spun carbon nanotube fibers for field emission devices.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5098328