Imperial College London

Prof Milo Shaffer

Faculty of Natural SciencesDepartment of Chemistry

Professor of Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 5825m.shaffer Website

 
 
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Assistant

 

Mr John Murrell +44 (0)20 7594 2845

 
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Location

 

M221Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Buckley:2017:10.1021/acs.jpcc.7b06553,
author = {Buckley, DJ and Hodge, SA and De, Marco M and Hu, S and Anthony, DB and Linden, Cullen P and Skipper, NT and Shaffer, MSP and Howard, CA},
doi = {10.1021/acs.jpcc.7b06553},
journal = {Journal of Physical Chemistry C},
pages = {21703--21712},
title = {Trajectory of the Selective Dissolution of Charged Single-Walled Carbon Nanotubes},
url = {http://dx.doi.org/10.1021/acs.jpcc.7b06553},
volume = {121},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - 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..
AU - Buckley,DJ
AU - Hodge,SA
AU - De,Marco M
AU - Hu,S
AU - Anthony,DB
AU - Linden,Cullen P
AU - Skipper,NT
AU - Shaffer,MSP
AU - Howard,CA
DO - 10.1021/acs.jpcc.7b06553
EP - 21712
PY - 2017///
SN - 1932-7447
SP - 21703
TI - Trajectory of the Selective Dissolution of Charged Single-Walled Carbon Nanotubes
T2 - Journal of Physical Chemistry C
UR - http://dx.doi.org/10.1021/acs.jpcc.7b06553
UR - http://hdl.handle.net/10044/1/50625
VL - 121
ER -