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dc.contributor.authorKucukayan, G.en_US
dc.contributor.authorOvali, R.en_US
dc.contributor.authorIlday, S.en_US
dc.contributor.authorBaykal, B.en_US
dc.contributor.authorYurdakul, H.en_US
dc.contributor.authorTuran, S.en_US
dc.contributor.authorGulseren, O.en_US
dc.contributor.authorBengu, E.en_US
dc.date.accessioned2016-02-08T09:54:37Z
dc.date.available2016-02-08T09:54:37Z
dc.date.issued2011en_US
dc.identifier.issn0008-6223
dc.identifier.urihttp://hdl.handle.net/11693/22041
dc.description.abstractMulti-walled carbon nanotubes (MWCNTs) were synthesized through pyrolysis of the sulfuric acid-carbonized byproduct of sucrose. While the presence of sulfur in the reaction media has a key role in the formation and population density of MWCNTs, we have not observed the formation of Y-junctions or encountered other novel carbon nanotube formations. Results indicate the presence of sulfur in catalyst particles trapped inside nanotubes, but failed to find sulfur in the side-walls of the CNTs. In order to verify and explain these findings, we analyzed the behavior of sulfur and its possible effects on the side-wall structure of CNTs by using density functional theory-based calculations on various atomic models depicting sulfur inclusion in the side-walls. The results of the computational study were in line with the experimental results and also provided a new perspective by suggesting that the defects such as pentagons may act as nucleation sites for the Y-branches. The results indicated that sulfur prefers to adsorb on these defective regions, but it is not responsible for the formation of these structures or defects.en_US
dc.language.isoEnglishen_US
dc.source.titleCarbonen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.carbon.2010.09.050en_US
dc.titleAn experimental and theoretical examination of the effect of sulfur on the pyrolytically grown carbon nanotubes from sucrose-based solid state precursorsen_US
dc.typeArticleen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Chemistryen_US
dc.citation.spage508en_US
dc.citation.epage517en_US
dc.citation.volumeNumber49en_US
dc.citation.issueNumber2en_US
dc.identifier.doi10.1016/j.carbon.2010.09.050en_US
dc.publisherElsevieren_US
dc.identifier.eissn1873-3891


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