Dimerization-Initiated Preferential Formation of Coronene-Based Graphene Nanoribbons in Carbon Nanotubes

We have investigated the growth mechanism of coronene-derived graphene nanoribbons (GNRs) using two different precursors: coronene and a dimer form of coronene, so-called dicoronylene (C48H20). For both of the precursors, the formation of nanoribbon-like materials inside carbon nanotubes (CNTs) was...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2012-07, Vol.116 (28), p.15141-15145
Main Authors: Fujihara, Miho, Miyata, Yasumitsu, Kitaura, Ryo, Nishimura, Yoshifumi, Camacho, Cristopher, Irle, Stephan, Iizumi, Yoko, Okazaki, Toshiya, Shinohara, Hisanori
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
Specific materials
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Summary:We have investigated the growth mechanism of coronene-derived graphene nanoribbons (GNRs) using two different precursors: coronene and a dimer form of coronene, so-called dicoronylene (C48H20). For both of the precursors, the formation of nanoribbon-like materials inside carbon nanotubes (CNTs) was confirmed by transmission electron microscope observations. Experimental and theoretical Raman analysis reveals that the samples also encapsulated dicoronylene and linearly condensed other coronene oligomers, which can be regarded as analogues to GNRs. Interestingly, it was found that the present doping condition of coronene yields dicoronylene prior to encapsulation due to the thermal dimerization of coronene. These results indicate that the dimerization before the encapsulation drives the preferential formation of the coronene-based GNRs within CNTs.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp3037268