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dc.contributor.authorHirano, Atsushi
Gao, Weilu
He, Xiaowei
Kono, Junichiro
dc.date.accessioned 2017-02-08T16:34:32Z
dc.date.available 2017-02-08T16:34:32Z
dc.date.issued 2017
dc.identifier.citation Hirano, Atsushi, Gao, Weilu, He, Xiaowei, et al.. "Destabilization of Surfactant-Dispersed Carbon Nanotubes by Anions." Nanoscale Research Letters, 12, (2017) Springer: http://dx.doi.org/10.1186/s11671-017-1850-1.
dc.identifier.urihttps://hdl.handle.net/1911/93856
dc.description.abstract The 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.
dc.language.iso eng
dc.publisher Springer
dc.rights This 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.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.title Destabilization of Surfactant-Dispersed Carbon Nanotubes by Anions
dc.type Journal article
dc.citation.journalTitle Nanoscale Research Letters
dc.subject.keywordcarbon nanotube
colloidal stability
separation
surfactant
anion
dc.citation.volumeNumber 12
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1186/s11671-017-1850-1
dc.type.publication publisher version
dc.citation.articleNumber 81


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