Longgitudinal splitting versus sequential unzipping of thick-walled carbon nanotubes: Towards controllable systhesis of high-quality graphitic nanoribbons

Yang, Ming, Hu, Liguo, Tang, Xingwei, Zhang, Hongdi, Zhu, Hanxing ORCID: https://orcid.org/0000-0002-3209-6831, Fan, Tongxiang and Zhang, Di 2016. Longgitudinal splitting versus sequential unzipping of thick-walled carbon nanotubes: Towards controllable systhesis of high-quality graphitic nanoribbons. Carbon 110 , pp. 480-489. 10.1016/j.carbon.2016.09.055

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Abstract

Despite significant efforts to develop ways to produce customized carbon-based nanostructures, facile synthesis of mass graphene/graphitic nanoribbons (GNRs) without losing the intrinsic sp2-structure and properties remains challenging. Here we report that bulk of multi-layered graphitic nanoribbons can be prepared by gas-phase oxidative splitting of multi-walled carbon nanotubes (MWCNTs) using HNO3 vapor. The longitudinal splitting behavior of MWCNTs is substantially dependent on three key factors: the utilization of gaseous oxidant, the use of highly-crystallined carbon nanotubes with larger diameter, and the associated high-pressure conditions. Moreover, this splitting process is evidenced to be edge-selective and nonaggressive as opposed to traditional wet chemical oxidation, for which the obtained GNRs show minimized oxidation level, highly intact crystalline and robust electrical conductance. This study suggests a simple yet effective strategy for producing mass high-quality GNRs.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0008-6223
Date of First Compliant Deposit:	10 October 2016
Date of Acceptance:	23 September 2016
Last Modified:	01 Nov 2022 11:31
URI:	https://orca.cardiff.ac.uk/id/eprint/95262

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