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dc.contributor.authorKierkowicz, Magdalenaes_ES
dc.contributor.authorPach, Elzbietaes_ES
dc.contributor.authorSantidrián, Anaes_ES
dc.contributor.authorSandoval, Stefaniaes_ES
dc.contributor.authorGonçalves, Giles_ES
dc.contributor.authorTobías Rossell, Esteres_ES
dc.contributor.authorKalbáč, Martines_ES
dc.contributor.authorBallesteros, Belénes_ES
dc.contributor.authorTobias, Gerardes_ES
dc.identifier.citationCarbon 139: 922-932 (2018)es_ES
dc.description.abstractShort carbon nanotubes (CNTs) are desired for a variety of applications. As a consequence, several strategies have been reported to cut and shorten the length of as-produced carbon nanotubes via chemical and physical routes. The efficiency of a given strategy largely depends on the physico-chemical characteristics of the CNTs employed. In order to be able to directly compare the advantages and disadvantages of commonly used protocols, a single batch of chemical vapor deposition single-walled CNTs (SWCNTs) and a batch of multi-walled CNTs (MWCNTs) were subjected to four cutting/shortening strategies, namely acid cutting, piranha treatment, steam shortening and ball milling. The length distribution was assessed by means of scanning electron microscopy. Sample purity and CNT wall structure were determined by Raman spectroscopy, thermogravimetric analysis and magnetic measurements. Within the employed experimental conditions, piranha treatment turned out to be the most efficient to achieve short SWCNTs with a narrow length distribution in a good yield, whereas a mixture of sulfuric/nitric acid was preferred in the case of MWCNTs. A subsequent short steam treatment allowed to remove functional groups present in the samples, leading to median length distributions of 266 nm and 225 nm for SWCNTs and MWCNTs respectively after the combined protocols.es_ES
dc.description.sponsorshipThe research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/ under REA grant agreement n°290023 (RADDEL). We acknowledge financial support from Spanish Ministry of Economy and Competitiveness through the “Severo Ochoa” Programme for Centres of Excellence in R&D (SEV-2015-0496, ICMAB; SEV-2013-0295, ICN2), and CHALENG (MAT2014-53500-R). M. K. also acknowledges support from the project LL1301 (MEYS). The ICN2 is funded by the CERCA programme (Generalitat de Catalunya). G. G. gratefully acknowledges the funding by European Commission under individual fellowship Marie Sklodowska-Curie (NANOTER, Grant Agreement 708351).We are thankful to Guillaume Sauthier from ICN2 for the XPS measurements. The authors would like to thank Thomas Swan Co. Ltd. for providing Elicarb© carbon nanotubes used for this study.es_ES
dc.titleComparative study of shortening and cutting strategies of single-walled and multi-walled carbon nanotubes assessed by scanning electron microscopyes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderEuropean Commissiones_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.contributor.funderGeneralitat de Catalunyaes_ES
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