Field emission from metal-containing amorphous carbon composite films

Citation
Sp. Lau et al., Field emission from metal-containing amorphous carbon composite films, DIAM RELAT, 10(9-10), 2001, pp. 1727-1731
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
DIAMOND AND RELATED MATERIALS
ISSN journal
0925-9635 → ACNP
Volume
10
Issue
9-10
Year of publication
2001
Pages
1727 - 1731
Database
ISI
SICI code
0925-9635(200109/10)10:9-10<1727:FEFMAC>2.0.ZU;2-Q
Abstract
Metal-containing (Co, Al and Ti) amorphous carbon composite films (a-C:Me) have been prepared by the filtered cathodic are technique using metal-conta ining graphite targets at room temperature. Field emission properties of th e heat-treated a-C:Me films were improved and were found to be dependent on the metal content and variety of metals. After heat-treatment at 550 degre esC in a mixture of acetylene and nitrogen gases, the field emission proper ties of a-C:Co films were significantly improved, in which Co acted as cata lysts to enhance graphitization as well as formation of carbon nanotubes du ring heat-treatment. A threshold electric field of less than 2 V/mum was ob tained from the heat-treated a-C:Co composite films without conditioning. T he heat-treated a-C:Al and a-C:Ti films, though the conditioning step could be avoided and relatively low threshold fields could be obtained, exhibite d relatively low emission site densities, however. The a-C:Me films, which can be deposited with a high rate at room temperature and require a relativ ely low temperature, heat-treatment process to enhance electron emission, a re promising for practical applications in field emission display. (C) 2001 Elsevier Science B.V. All rights reserved.