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Enhanced surface morphologies of screen-printed carbon nanotube films by heat treatment and their field-emission properties
- Source :
- Carbon. 44:2625-2630
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- A heating process for obtaining free-standing carbon nanotube emitters is presented with the aim of improving field-emission properties from the screen-printed multiwalled carbon nanotube (MWCNT) films. Using an atmosphere with an optimum combination of nitrogen and air for heat treatment of CNT films, the CNT emitters can be made to protrude from the surface. This allows for a high emission current and the formation of very uniform emission sites without special surface treatment. The morphological change of the CNT film by this technique has eliminated additional processing steps, such as surface treatment which may result in secondary contamination and damage to the film. Despite its simplicity the process provides a high reproducibility in emission current density which makes the films suitable for practical applications.
- Subjects :
- Surface (mathematics)
Nanotube
Materials science
business.industry
chemistry.chemical_element
Nanotechnology
General Chemistry
Carbon nanotube
Nitrogen
law.invention
Condensed Matter::Materials Science
Field electron emission
Carbon film
chemistry
law
Optoelectronics
General Materials Science
Current (fluid)
business
Current density
Subjects
Details
- ISSN :
- 00086223
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Carbon
- Accession number :
- edsair.doi...........f3def6e6e6067e87455749d7b6dd4587