Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2716
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dc.contributor.authorAksak, Meral-
dc.contributor.authorSelamet, Yusuf-
dc.date.accessioned2017-01-04T12:38:03Z-
dc.date.available2017-01-04T12:38:03Z-
dc.date.issued2010-07-
dc.identifier.citationAksak, M., and Selamet, Y. (2010). Carbon nanotube diameter tuning using hydrogen amount and temperature on SiO2/Si substrates. Applied Physics A: Materials Science and Processing, 100(1), 213-222. doi:10.1007/s00339-010-5578-3en_US
dc.identifier.issn0947-8396-
dc.identifier.issn1432-0630-
dc.identifier.urihttp://doi.org/10.1007/s00339-010-5578-3-
dc.identifier.urihttp://hdl.handle.net/11147/2716-
dc.description.abstractCarbon nanotubes (CNTs) were grown on thin iron (Fe) films on SiO 2/Si substrates by chemical vapor deposition (CVD) at four different hydrogen (H2)/methane (CH4) ratios at temperatures ranging from 925 to 1000°C. The effects of temperature and the amount of hydrogen gas on the mean diameter at increasing temperature were examined. We demonstrated that the mean diameter and its distribution depend not only on temperature but also on the H2 amount. We showed that increasing H2 amount strongly affects the structure of CNTs, especially at high growth temperature; the mean diameter at 1000°C reduced from about 383 to 34 nm by increasing H2 amount from 24 to 50 sccm. We observed that at high temperature growth the mean diameter was decreasing very fast initially with increasing H2 amount suggesting the dominance of H2 over the growth temperature. A decrease in the slope of diameter vs. H 2 amount with further increment in H2 amount implied that the temperature was, then, deciding the CNT diameter through catalyst particle coarsening. The statistical analysis presented implies that the H2 amount has to be adjusted according to the growth temperature for given CH 4 amount to keep CNT diameter under control, and the large diameter distributions at high temperature and high H2 amount can be associated with the large variation in the catalyst particle sizes. © 2010 Springer-Verlag.en_US
dc.description.sponsorshipThe Scientific and Technological Research Council of Turkey project no. 105T462en_US
dc.language.isoenen_US
dc.publisherSpringer Verlagen_US
dc.relation.ispartofApplied Physics A: Materials Science and Processingen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCarbon nanotubesen_US
dc.subjectCatalyst particle sizeen_US
dc.subjectEffects of temperatureen_US
dc.subjectStatistical analysisen_US
dc.subjectMean diameteren_US
dc.titleCarbon nanotube diameter tuning using hydrogen amount and temperature on SiO2/Si substratesen_US
dc.typeArticleen_US
dc.institutionauthorAksak, Meral-
dc.institutionauthorSelamet, Yusuf-
dc.departmentIzmir Institute of Technology. Physicsen_US
dc.identifier.volume100en_US
dc.identifier.issue1en_US
dc.identifier.startpage213en_US
dc.identifier.endpage222en_US
dc.identifier.wosWOS:000279127700032en_US
dc.identifier.scopus2-s2.0-77954083409en_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.1007/s00339-010-5578-3-
dc.relation.doi10.1007/s00339-010-5578-3en_US
dc.coverage.doi10.1007/s00339-010-5578-3en_US
dc.identifier.scopusqualityQ1-
item.cerifentitytypePublications-
item.openairetypeArticle-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.grantfulltextopen-
item.fulltextWith Fulltext-
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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