Wafer-scale fabrication and growth dynamics of suspended graphene nanoribbon arrays

Hiroo Suzuki, Toshiro Kaneko, Yasushi Shibuta, Munekazu Ohno, Yuki Maekawa and Toshiaki Kato ()
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Hiroo Suzuki: Tohoku University
Toshiro Kaneko: Tohoku University
Yasushi Shibuta: The University of Tokyo
Munekazu Ohno: Faculty of Engineering, Hokkaido University
Yuki Maekawa: The University of Tokyo
Toshiaki Kato: Tohoku University

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Adding a mechanical degree of freedom to the electrical and optical properties of atomically thin materials can provide an excellent platform to investigate various optoelectrical physics and devices with mechanical motion interaction. The large scale fabrication of such atomically thin materials with suspended structures remains a challenge. Here we demonstrate the wafer-scale bottom–up synthesis of suspended graphene nanoribbon arrays (over 1,000,000 graphene nanoribbons in 2 × 2 cm2 substrate) with a very high yield (over 98%). Polarized Raman measurements reveal graphene nanoribbons in the array can have relatively uniform-edge structures with near zigzag orientation dominant. A promising growth model of suspended graphene nanoribbons is also established through a comprehensive study that combined experiments, molecular dynamics simulations and theoretical calculations with a phase-diagram analysis. We believe that our results can contribute to pushing the study of graphene nanoribbons into a new stage related to the optoelectrical physics and industrial applications.

Date: 2016
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DOI: 10.1038/ncomms11797

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