Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants

Arc discharge single-walled carbon nanotubes (SWCNTs) were modified through different oxidative treatments and functionalization reactions. The modified SWCNT powders were dispersed in four different aqueous media and purified by ultracentrifugation. Extinction coefficients of the modified SWCNTs de...

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Autores: Ansón-Casaos, Alejandro, González Domínguez, José Miguel, Lafragüeta, Ignacio, Carrodeguas, José A., Martínez Fernández de Landa, María Teresa
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2014
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/90377
Acceso en línea:http://hdl.handle.net/10261/90377
Access Level:acceso abierto
Palabra clave:Single-walled carbon nanotubes
Optical absorption
Functionalization
Aqueous media
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spelling Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersantsAnsón-Casaos, AlejandroGonzález Domínguez, José MiguelLafragüeta, IgnacioCarrodeguas, José A.Martínez Fernández de Landa, María TeresaSingle-walled carbon nanotubesOptical absorptionFunctionalizationAqueous mediaArc discharge single-walled carbon nanotubes (SWCNTs) were modified through different oxidative treatments and functionalization reactions. The modified SWCNT powders were dispersed in four different aqueous media and purified by ultracentrifugation. Extinction coefficients of the modified SWCNTs depended on the SWCNT type but did not depend on the dispersion medium. According to visible/near infrared spectroscopy, the purity of all the modified SWCNT dispersions substantially improved after ultracentrifugation; however, the spectrum profile, the degree of purity and the centrifugation yield were influenced by the SWCNT type, the surface functional groups and the dispersion medium. Semi-quantitative purity indexes calculated from optical absorption spectra were supported by transmission electron microscopy observations. Contents in metal impurities were analyzed by energy dispersive X-ray spectroscopy. SWCNT samples processed by oxidative acid treatments and ultracentrifugation showed metal contents of lower than 0.5 wt%.This work was funded by the Spanish MINECO under the projects TEC2010-15736 and PRI-PIBAR-2011-1, and the Government of Aragon (DGA) and the European Social Fund (ESF) under Project DGA-ESF-T66 CNN.Peer ReviewedElsevier2014201420142014info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/90377reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.carbon.2013.08.048info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/903772026-05-22T06:33:51Z
dc.title.none.fl_str_mv Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
title Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
spellingShingle Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
Ansón-Casaos, Alejandro
Single-walled carbon nanotubes
Optical absorption
Functionalization
Aqueous media
title_short Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
title_full Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
title_fullStr Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
title_full_unstemmed Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
title_sort Optical absorption response of chemically modified single-walled carbon nanotubes upon ultracentrifugation in various dispersants
dc.creator.none.fl_str_mv Ansón-Casaos, Alejandro
González Domínguez, José Miguel
Lafragüeta, Ignacio
Carrodeguas, José A.
Martínez Fernández de Landa, María Teresa
author Ansón-Casaos, Alejandro
author_facet Ansón-Casaos, Alejandro
González Domínguez, José Miguel
Lafragüeta, Ignacio
Carrodeguas, José A.
Martínez Fernández de Landa, María Teresa
author_role author
author2 González Domínguez, José Miguel
Lafragüeta, Ignacio
Carrodeguas, José A.
Martínez Fernández de Landa, María Teresa
author2_role author
author
author
author
dc.subject.none.fl_str_mv Single-walled carbon nanotubes
Optical absorption
Functionalization
Aqueous media
topic Single-walled carbon nanotubes
Optical absorption
Functionalization
Aqueous media
description Arc discharge single-walled carbon nanotubes (SWCNTs) were modified through different oxidative treatments and functionalization reactions. The modified SWCNT powders were dispersed in four different aqueous media and purified by ultracentrifugation. Extinction coefficients of the modified SWCNTs depended on the SWCNT type but did not depend on the dispersion medium. According to visible/near infrared spectroscopy, the purity of all the modified SWCNT dispersions substantially improved after ultracentrifugation; however, the spectrum profile, the degree of purity and the centrifugation yield were influenced by the SWCNT type, the surface functional groups and the dispersion medium. Semi-quantitative purity indexes calculated from optical absorption spectra were supported by transmission electron microscopy observations. Contents in metal impurities were analyzed by energy dispersive X-ray spectroscopy. SWCNT samples processed by oxidative acid treatments and ultracentrifugation showed metal contents of lower than 0.5 wt%.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014
2014
2014
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/90377
url http://hdl.handle.net/10261/90377
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.carbon.2013.08.048
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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