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Trajectory of the Selective Dissolution of Charged Single-Walled Carbon Nanotubes

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Title: Trajectory of the Selective Dissolution of Charged Single-Walled Carbon Nanotubes
Authors: Buckley, DJ
Hodge, SA
De Marco, M
Hu, S
Anthony, DB
Linden Cullen, P
Skipper, NT
Shaffer, MSP
Howard, CA
Item Type: Journal Article
Abstract: Single-Walled Carbon Nanotubes (SWCNTs) are materials with an array of remarkable physical properties determined by their geometries, however, SWCNTs are typically produced as a mixture of different lengths and electronic types. Consequently, many methods have been developed to sort the as-produced SWCNT samples by their physical cha-racteristics, often requiring aggressive and unscalable techniques to overcome the strong bundling forces between the nanotubes. Previously, it has been shown that negatively charging SWCNTs can lead to their thermodynamically-driven dissolution in polar solvents, and moreover that this process can selectively dissolve different SWNCT species, albeit with contrasting claims of selectivity. Here we carefully investigate dissolution as a function of charge added to the SWCNT starting material, using a range of complementary techniques. We uncover a far richer dependence on charge of SWCNT dissolution than previously reported. At low charge added, amorphous carbons preferentially dissolve, followed sequentially by metallic, larger diameter semiconducting SWCNTs, and finally smaller diameter semiconducting SWCNTs. At an optimal value, the dissolution yield is maximized across all species, however at higher charge than this we find the larger diameter and metallic SWCNTs are so charged they are no longer soluble, leaving smaller diameter SWCNTs in solution. Our results therefore clearly demonstrate two interconnected mechanisms for dissolution: on one hand charging of the SWNCTs based on their respective electron affinities on the other the solution thermodynamics. This work reconciles contrasting reports in the literature, provides a blueprint for scalable SWCNT separation and more generally demonstrates the..
Issue Date: 4-Sep-2017
Date of Acceptance: 4-Sep-2017
URI: http://hdl.handle.net/10044/1/50625
DOI: https://dx.doi.org/10.1021/acs.jpcc.7b06553
ISSN: 1932-7447
Publisher: American Chemical Society
Start Page: 21703
End Page: 21712
Journal / Book Title: Journal of Physical Chemistry C
Volume: 121
Issue: 39
Copyright Statement: This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/G007314/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
09 Engineering
03 Chemical Sciences
10 Technology
Physical Chemistry
Publication Status: Published online
Appears in Collections:Chemistry
Chemical Engineering
School of Public Health
Faculty of Natural Sciences
Faculty of Engineering