Dimerization-initiated preferential formation of coronene-based graphene nanoribbons in carbon nanotubes

Miho Fujihara, Yasumitsu Miyata, Ryo Kitaura, Yoshifumi Nishimura, Cristopher Camacho, Stephan Irle, Yoko Iizumi, Toshiya Okazaki, Hisanori Shinohara

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Abstract

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 (C 48H 20). 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.

Original languageEnglish
Pages (from-to)15141-15145
Number of pages5
JournalJournal of Physical Chemistry C
Volume116
Issue number28
DOIs
Publication statusPublished - 2012 Jul 19
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Fujihara, M., Miyata, Y., Kitaura, R., Nishimura, Y., Camacho, C., Irle, S., Iizumi, Y., Okazaki, T., & Shinohara, H. (2012). Dimerization-initiated preferential formation of coronene-based graphene nanoribbons in carbon nanotubes. Journal of Physical Chemistry C, 116(28), 15141-15145. https://doi.org/10.1021/jp3037268