Optical properties of graphene nanoribbons encapsulated in single-walled carbon nanotubes

Alexander I. Chernov, Pavel V. Fedotov, Alexandr V. Talyzin, Inma Suarez Lopez, Ilya V. Anoshkin, Albert G. Nasibulin, Esko I. Kauppinen, Elena D. Obraztsova

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)

Abstract

We report the photoluminescence (PL) from graphene nanoribbons (GNRs) encapsulated in single-walled carbon nanotubes (SWCNTs). New PL spectral features originating from GNRs have been detected in the visible spectral range. PL peaks from GNRs have resonant character, and their positions depend on the ribbon geometrical structure in accordance with the theoretical predictions. GNRs were synthesized using confined polymerization and fusion of coronene molecules. GNR@SWCNTs material demonstrates a bright photoluminescence both in infrared (IR) and visible regions. The photoluminescence excitation mapping in the near-IR spectral range has revealed the geometry-dependent shifts of the SWCNT peaks (up to 11 meV in excitation and emission) after the process of polymerization of coronene molecules inside the nanotubes. This behavior has been attributed to the strain of SWCNTs induced by insertion of the coronene molecules.

Original languageEnglish
Pages (from-to)6346-6353
Number of pages8
JournalACS Nano
Volume7
Issue number7
DOIs
Publication statusPublished - 23 Jul 2013
Externally publishedYes

Keywords

  • coronene
  • graphene nanoribbons
  • one-dimensional graphene structure
  • photoluminescence
  • single-walled carbon nanotubes

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