Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/boms/033/03/0215-0220

Amorphous carbon; transport; field emission.

The influence of concentration and size of 𝑠𝑝² 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 𝑠𝑝² clusters. The connectivity is resulted by the cluster concentration and size. The concentration and size of 𝑠𝑝² content cluster is regulated by the coalescence of carbon globules into clusters, which evolves with deposition conditions.

Pitamber Mahanandia¹ P N Viswakarma¹ Prasad Vishnu Bhotla¹ S V Subramanyam¹ Karuna Kar Nanda²

1. Department of Physics, Indian Institute of Science, Bangalore 560 012, India
2. Materials Research Centre, Indian Institute of Science, Bangalore 560 012, India

Published

June 2010

Manuscript received

20 October 2010