Effect of tetrahedral amorphous carbon coating on the resistivity and wear of single-walled carbon nanotube network

Ajai Iyer, Antti Kaskela, Serguei Novikov, Jarkko Etula, Xuwen Liu, Esko I. Kauppinen, Jari Koskinen

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Single walled carbon nanotube networks (SWCNTNs) were coated by tetrahedral amorphous carbon (ta-C) to improve the mechanical wear properties of the composite film. The ta-C deposition was performed by using pulsed filtered cathodic vacuum arc method resulting in the generation of C+ ions in the energy range of 40-60 eV which coalesce to form a ta-C film. The primary disadvantage of this process is a significant increase in the electrical resistance of the SWCNTN post coating. The increase in the SWCNTN resistance is attributed primarily to the intrinsic stress of the ta-C coating which affects the inter-bundle junction resistance between the SWCNTN bundles. E-beam evaporated carbon was deposited on the SWCNTNs prior to the ta-C deposition in order to protect the SWCNTN from the intrinsic stress of the ta-C film. The causes of changes in electrical resistance and the effect of evaporated carbon thickness on the changes in electrical resistance and mechanical wear properties have been studied.

Original languageEnglish
Article number185306
Number of pages10
JournalJournal of Applied Physics
Volume119
Issue number18
DOIs
Publication statusPublished - 14 May 2016
MoE publication typeA1 Journal article-refereed

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