Destabilization of Surfactant-Dispersed Carbon Nanotubes by Anions

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dc.citation.articleNumber81en_US
dc.citation.journalTitleNanoscale Research Lettersen_US
dc.citation.volumeNumber12en_US
dc.contributor.authorHirano, Atsushien_US
dc.contributor.authorGao, Weiluen_US
dc.contributor.authorHe, Xiaoweien_US
dc.contributor.authorKono, Junichiroen_US
dc.date.accessioned2017-02-08T16:34:32Zen_US
dc.date.available2017-02-08T16:34:32Zen_US
dc.date.issued2017en_US
dc.description.abstractThe colloidal stability of surfactant-dispersed single-wall carbon nanotubes (SWCNTs) is determined by microscopic physicochemical processes, such as association, partitioning, and adsorption propensities. These processes can be controlled by the addition of solutes. While the effects of cations on the colloidal stability of SWCNTs are relatively well understood, little is known about the effects of anions. In this study, we examined the effects of anions on the stability of SWCNTs dispersed by sodium dodecyl sulfate (SDS) using sodium salts, such as NaCl and NaSCN. We observed that the intensity of the radial breathing mode Raman peaks rapidly decreased as the salts were added, even at concentrations less than 25 mM, indicating the association of SWCNTs. The effect was stronger with NaSCN than NaCl. We propose that the association of SWCNTs was caused by thermodynamic destabilization of SDS assemblies on SWCNT surfaces by these salts, which was confirmed through SWCNT separation experiments using aqueous two-phase extraction and gel chromatography. These results demonstrate that neutral salts can be used to control the colloidal stability of surfactant-dispersed SWCNTs.en_US
dc.identifier.citationHirano, Atsushi, Gao, Weilu, He, Xiaowei, et al.. "Destabilization of Surfactant-Dispersed Carbon Nanotubes by Anions." <i>Nanoscale Research Letters,</i> 12, (2017) Springer: http://dx.doi.org/10.1186/s11671-017-1850-1.en_US
dc.identifier.doihttp://dx.doi.org/10.1186/s11671-017-1850-1en_US
dc.identifier.urihttps://hdl.handle.net/1911/93856en_US
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rightsThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordcarbon nanotubeen_US
dc.subject.keywordcolloidal stabilityen_US
dc.subject.keywordseparationen_US
dc.subject.keywordsurfactanten_US
dc.subject.keywordanionen_US
dc.titleDestabilization of Surfactant-Dispersed Carbon Nanotubes by Anionsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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