Assessing Inhomogeneity in Sorted Samples of Single-Walled Carbon Nanotubes through Fluorescence and Variance Spectroscopy

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dc.citation.firstpageM3097en_US
dc.citation.issueNumber6en_US
dc.citation.journalTitleECS Journal of Solid State Science and Technologyen_US
dc.citation.lastpageM3102en_US
dc.citation.volumeNumber6en_US
dc.contributor.authorKadria-Vili, Yaraen_US
dc.contributor.authorSanchez, Stephen R.en_US
dc.contributor.authorBachilo, Sergei M.en_US
dc.contributor.authorWeisman, R. Bruceen_US
dc.date.accessioned2017-02-08T16:34:32Z
dc.date.available2017-02-08T16:34:32Z
dc.date.issued2017en_US
dc.description.abstractDetailed spectroscopic analysis has been used to study the homogeneity of single-walled carbon nanotube fractions carefully prepared by nonlinear density gradient ultracentrifugation sorting. Two distinct colored bands containing (6,5) enantiomers were subdivided into several extracted fractions that were separately diluted with sodium cholate surfactant and characterized by fluorescence, absorption, and variance spectroscopy. Values were measured for emission and absorption peak positions, Stokes shifts, emission peak widths, and emissive quantum yields. In addition, variance data were used to find relative emission per nanotube and to plot covariance slices representing homogeneous emission spectra. It was found that emission from SWCNTs within the upper enantiomer band shifts to shorter wavelengths with increasing depth in the centrifuge tube. In the lower enantiomer band such spectral shifts were not observed, but the emissive quantum yields decreased with depth. Variance analysis revealed spectral differences among SWCNTs within the same fraction of the same band. It is concluded that current methods for density gradient ultracentrifugation sorting produce samples that retain measurable structural and spectral inhomogeneities.en_US
dc.identifier.citationKadria-Vili, Yara, Sanchez, Stephen R., Bachilo, Sergei M., et al.. "Assessing Inhomogeneity in Sorted Samples of Single-Walled Carbon Nanotubes through Fluorescence and Variance Spectroscopy." <i>ECS Journal of Solid State Science and Technology,</i> 6, no. 6 (2017) The Electrochemical Society: M3097-M3102. http://dx.doi.org/10.1149/2.0171706jss.
dc.identifier.doihttp://dx.doi.org/10.1149/2.0171706jssen_US
dc.identifier.urihttps://hdl.handle.net/1911/93863
dc.language.isoengen_US
dc.publisherThe Electrochemical Society
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License, which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordcovarianceen_US
dc.subject.keyworddensity gradient ultracentrifugationen_US
dc.subject.keywordenantiomersen_US
dc.subject.keywordseparationen_US
dc.subject.keywordSWCNTen_US
dc.titleAssessing Inhomogeneity in Sorted Samples of Single-Walled Carbon Nanotubes through Fluorescence and Variance Spectroscopyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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