Electrical breakdown of carbon nanotube devices and the predictability of breakdown position

Goswami, Gopal Krishna and Nanda, Karuna Kar (2012) Electrical breakdown of carbon nanotube devices and the predictability of breakdown position. In: AIP ADVANCES, 2 (2).

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Abstract

We have investigated electrical transport properties of long (>10 mu m) multiwalled carbon nanotubes (NTs) by dividing individuals into several segments of identical length. Each segment has different resistance because of the random distribution of defect density in an NT and is corroborated by Raman studies. Higher is the resistance, lower is the current required to break the segments indicating that breakdown occurs at the highly resistive segment/site and not necessarily at the middle. This is consistent with the one-dimensional thermal transport model. We have demonstrated the healing of defects by annealing at moderate temperatures or by current annealing. To strengthen our mechanism, we have carried out electrical breakdown of nitrogen doped NTs (NNTs) with diameter variation from one end to the other. It reveals that the electrical breakdown occurs selectively at the narrower diameter region. Overall, we believe that our results will help to predict the breakdown position of both semiconducting and metallic NTs. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. http://dx.doi.org/10.1063/1.4720426]

Item Type:	Journal Article
Publication:	AIP ADVANCES
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to the American Institute of Physics
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	31 Jul 2012 12:03
Last Modified:	31 Jul 2012 12:03
URI:	http://eprints.iisc.ac.in/id/eprint/44898

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