Synthesis of graphene nanoribbons encapsulated in single-walled carbon nanotubes |
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Authors: | Talyzin Alexandr V Anoshkin Ilya V Krasheninnikov Arkady V Nieminen Risto M Nasibulin Albert G Jiang Hua Kauppinen Esko I |
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Affiliation: | Department of Physics, Ume? University , S-90187 Ume?, Sweden. |
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Abstract: | A novel material, graphene nanoribbons encapsulated in single-walled carbon nanotubes (GNR@SWNT), was synthesized using confined polymerization and fusion of polycyclic aromatic hydrocarbon (PAH) molecules. Formation of the GNR is possible due to confinement effects provided by the one-dimensional space inside nanotubes, which helps to align coronene or perylene molecules edge to edge to achieve dimerization and oligomerization of the molecules into long nanoribbons. Almost 100% filling of SWNT with GNR is achieved while nanoribbon length is limited only by the length of the encapsulating nanotube. The PAH fusion reaction provides a very simple and easily scalable method to synthesize GNR@SWNT in macroscopic amounts. First-principle simulations indicate that encapsulation of the GNRs is energetically favorable and that the electronic structure of the encapsulated GNRs is the same as for the free-standing ones, pointing to possible applications of the GNR@SWNT structures in photonics and nanoelectronics. |
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