journal article·2015-05-26

Fabrication and Optical Probing of Highly Extended, Ultrathin Graphene Nanoribbons in Carbon Nanotubes

Hong En Lim, Yasumitsu Miyata, Miho Fujihara, Susumu Okada, Zheng Liu, Arifin, Kayoko Sato, Haruka Omachi, Ryo Kitaura, Stephan Irle, Kazu Suenaga, Hisanori Shinohara

ACS Nano· Volume 9· Issue 5
Publisher page

Abstract

Nanotemplated growth of graphene nanoribbons (GNRs) inside carbon nanotubes is a promising mean to fabricate ultrathin ribbons with desired side edge configuration. We report the optical properties of the GNRs formed in single-wall carbon nanotubes. When coronene is used as the precursor, extended GNRs are grown via a high-temperature annealing at 700 °C. Their optical responses are probed through the diazonium-based side-wall functionalization, which effectively suppresses the excitonic absorption peaks of the nanotubes without damaging the inner GNRs. Differential absorption spectra clearly show two distinct peaks around 1.5 and 3.4 eV. These peaks are assigned to the optical transitions between the van Hove singularities in the density of state of the GNRs in qualitative agreement with the first-principles calculations. Resonance Raman spectra and transmission electron microscope observations also support the formation of long GNRs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Graphene research and applications · Carbon Nanotubes in Composites · Molecular Junctions and Nanostructures

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, Nagoya University, Nagoya 464-8602, Japan

Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan

JST, PRESTO, Kawaguchi 332-0012, Japan

Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8571, Japan

Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan

WPI-Institute of Transformative Bio-Molecules (ITbM), Nagoya University, Nagoya 464-8602, Japan

Institute for Advanced Research, Nagoya University, Nagoya 464-8602, Japan

Funding

Ministry of Education, Culture, Sports, Science, and Technology · Nagoya University · Core Research for Evolutional Science and Technology, Japan Science and Technology Agency · Japan Society for the Promotion of Science · Japan Science and Technology Agency

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