Influence of crystallinity on the electrical conductivity of individual carbon nanotubes

The material properties of graphene and carbon nanotubes are highly sensitive to defects. Future exploitation of these materials will thereby rely on both a detailed understanding and classification schemes for material quality. Here we have used electron diffraction to measure the mean effective cr...

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Autores principales:	Mattias Flygare, Krister Svensson
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Carbon nanotubes Electrical conductivity Crystallinity Quantum confinement Transmission electron microscopy Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/9c8575365b5841bf9b222f328b47d7e8
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id	oai:doaj.org-article:9c8575365b5841bf9b222f328b47d7e8
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spelling	oai:doaj.org-article:9c8575365b5841bf9b222f328b47d7e82021-11-22T04:33:19ZInfluence of crystallinity on the electrical conductivity of individual carbon nanotubes2667-056910.1016/j.cartre.2021.100125https://doaj.org/article/9c8575365b5841bf9b222f328b47d7e82021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667056921001024https://doaj.org/toc/2667-0569The material properties of graphene and carbon nanotubes are highly sensitive to defects. Future exploitation of these materials will thereby rely on both a detailed understanding and classification schemes for material quality. Here we have used electron diffraction to measure the mean effective crystallite size of individual multiwalled carbon nanotubes, while also probing their electrical resistance. At room temperature we find a drastic shift in linear resistance of two orders of magnitude at a critical grain size of about 11 nm, which we interpret as an effect from quantum confinement and edge effects in the individual crystallites. For the regions above and below the critical grain size value we suggest a scaling model for the electrical conductivity within a single layer of a multiwalled carbon nanotube which connects its electrical conductivity with the effective crystallite size and tube diameter.Mattias FlygareKrister SvenssonElsevierarticleCarbon nanotubesElectrical conductivityCrystallinityQuantum confinementTransmission electron microscopyChemistryQD1-999ENCarbon Trends, Vol 5, Iss , Pp 100125- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Carbon nanotubes Electrical conductivity Crystallinity Quantum confinement Transmission electron microscopy Chemistry QD1-999
spellingShingle	Carbon nanotubes Electrical conductivity Crystallinity Quantum confinement Transmission electron microscopy Chemistry QD1-999 Mattias Flygare Krister Svensson Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
description	The material properties of graphene and carbon nanotubes are highly sensitive to defects. Future exploitation of these materials will thereby rely on both a detailed understanding and classification schemes for material quality. Here we have used electron diffraction to measure the mean effective crystallite size of individual multiwalled carbon nanotubes, while also probing their electrical resistance. At room temperature we find a drastic shift in linear resistance of two orders of magnitude at a critical grain size of about 11 nm, which we interpret as an effect from quantum confinement and edge effects in the individual crystallites. For the regions above and below the critical grain size value we suggest a scaling model for the electrical conductivity within a single layer of a multiwalled carbon nanotube which connects its electrical conductivity with the effective crystallite size and tube diameter.
format	article
author	Mattias Flygare Krister Svensson
author_facet	Mattias Flygare Krister Svensson
author_sort	Mattias Flygare
title	Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
title_short	Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
title_full	Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
title_fullStr	Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
title_full_unstemmed	Influence of crystallinity on the electrical conductivity of individual carbon nanotubes
title_sort	influence of crystallinity on the electrical conductivity of individual carbon nanotubes
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9c8575365b5841bf9b222f328b47d7e8
work_keys_str_mv	AT mattiasflygare influenceofcrystallinityontheelectricalconductivityofindividualcarbonnanotubes AT kristersvensson influenceofcrystallinityontheelectricalconductivityofindividualcarbonnanotubes
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Influence of crystallinity on the electrical conductivity of individual carbon nanotubes

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