Electron field emission from cluster-assembled carbon thin films
Engineering Department, Cambridge University - CB2 1PZ, UK
2 INFM-Dipartimento di Fisica, Università di Milano Via Celoria 16, 20133 Milano, Italy
Accepted: 11 February 1999
Cluster-assembled carbon films deposited at room temperature from a supersonic cluster beam are found to be good electron field emitters. The films have been characterized by Raman spectroscopy showing a largely sp2 bonded character. Scanning Electron Microscopy shows that the films have a low-density granular structure, characterized by voids on the nanoscale. We have observed a threshold field of for an emission current density of , among the lowest values reported for a carbon phase. The observed field emission characteristics suggest that this nanostructured material may be interesting for flat panel display applications.
PACS: 79.70.+q – Field emission, ionization, evaporation, and desorption / 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials / 61.48.+c – Fullerenes and fullerene-related materials
© EDP Sciences, 1999