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ANNEALING TEMPERATURE EFFECT ON THE FIELD EMISSION PROPERTIES OF CARBON NANOTUBE FILMS.
- Source :
-
Surface Review & Letters . Oct2007, Vol. 14 Issue 5, p969-972. 4p. 1 Color Photograph, 1 Diagram, 2 Graphs. - Publication Year :
- 2007
-
Abstract
- As the carbon nanotubes (CNTs) films are applied to the field emission cathodes in the vacuum devices, heat treatment in the range of 400°C–500°C is often conducted during the device sealing process, especially for glass-based devices. The annealing temperature effect on the field emission of the CNT films prepared by chemical vapor deposition is investigated. The CNT film annealed at 400°C in air contains less amorphous carbon phase, and shows better field emission properties comparing to the as-grown CNT film. Annealing at 450°C causes serious oxidative damage along the tube walls, resulting in the poor field emission performance. The CNTs annealed at 500°C are all burned out. The experiment shows that the sealing temperature at 400°C or below can be conducted in air, while the sealing temperature above 400°C should be done in N2 or Ar ambient. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0218625X
- Volume :
- 14
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Surface Review & Letters
- Publication Type :
- Academic Journal
- Accession number :
- 27176398
- Full Text :
- https://doi.org/10.1142/S0218625X07010391