Journal
ACS NANO
Volume 7, Issue 7, Pages 6346-6353Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn4024152
Keywords
single-walled carbon nanotubes; graphene nanoribbons; coronene; photoluminescence; one-dimensional graphene structure
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Funding
- RFBR [13-02-01354, 13-02-90719, 12-02-31581]
- RAS
- Ministry of Education and Science of Russian Federation [14.513.12.003, SP-7362.2013.3]
- Academy of Finland
- Swedish Research Council [621-2012-3654]
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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.
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