Electron field emission from sp (2)-induced insulating to metallic behaviour of amorphous carbon (a-C) films

Mahanandia, Pitamber and Viswakarma, PN and Bhotla, Prasad Vishnu and Subramanyam, SV and Nanda, Karuna Kar (2010) Electron field emission from sp (2)-induced insulating to metallic behaviour of amorphous carbon (a-C) films. In: Bulletin of Materials Science, 33 (3). pp. 215-220.

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Abstract

The influence of concentration and size of sp (2) cluster on the transport properties and electron field emissions of amorphous carbon films have been investigated. The observed insulating to metallic behaviour from reduced activation energy derived from transport measurement and threshold field for electron emission of a-C films can be explained in terms of improvements in the connectivity between sp (2) clusters. The connectivity is resulted by the cluster concentration and size. The concentration and size of sp (2) content cluster is regulated by the coalescence of carbon globules into clusters, which evolves with deposition conditions.

Item Type:	Journal Article
Publication:	Bulletin of Materials Science
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences.
Keywords:	Amorphous carbon;transport;field emission.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Oct 2010 10:33
Last Modified:	25 Oct 2010 10:40
URI:	http://eprints.iisc.ac.in/id/eprint/33448

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