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Self-texturing of nitrogenated amorphous carbon thin films for electron field emission

Silva, SRP, Amaratunga, GAJ and Barnes, JR (1997) Self-texturing of nitrogenated amorphous carbon thin films for electron field emission APPLIED PHYSICS LETTERS, 71 (11). 1477 - 1479. ISSN 0003-6951

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The electron field-emission process for nitrogenated amorphous carbon ~a-C:H:N! thin films deposited using a magnetically confined hydrocarbon plasma is examined. The morphology of the films obtained using an atomic force microscope is compared to the field-emission properties. Beyond a chemical composition of 14 at. % nitrogen, the mirror smooth a-C:H:N films become self-texturing, and multiple ‘‘domelike’’ cathodes of nanometer scale are observed. The dimensions of these ‘‘domelike’’ cathodes varies with time, and after a 15 min deposition have dimensions of approximately 50 nm base diameter and 20 nm in height. When the electronic field emission of these textured films ~N content 15 at. %! are measured, there is an enhancement in the emitted current density of ;2 orders of magnitude at an electric field of 20 V/mm, in comparison to the untextured films with a nitrogen content of 11 at. %.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Applied, Physics, DIAMOND-LIKE CARBON, CATHODES, DENSITY
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Melanie Hughes
Date Deposited: 29 Sep 2010 13:23
Last Modified: 23 Sep 2013 18:38

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