Wafer-scale synthesis and optoelectrical applications of bottom-up graphene nanoribbons

Toshiaki Kato, Hiroo Suzuki, Toshiro Kaneko

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Graphene nanoribbons (GNRs) combine the unique electronic and spin properties of graphene with a transport gap that arises from quantum confinement and edge effects. This makes them an attractive candidate material for the channels of next-generation transistors. However, the reliable site and alignment control of nanoribbons with high on/off current ratios remains a challenge. We have developed a new, simple, scalable method based on novel plasma catalytic reaction [1-4] for directly fabricating narrow GNRs devices with a clear transport gap [5]. The growth dynamics of suspended GNR is also investigated through the systematic experimental study combined with molecular dynamics simulation and theoretical calculations for phase diagram analysis. The improvement of thermal stability of Ni nanobar can be a key to realize the GNR nucleation in our method, which can be given by supplying higher density of carbon from plasma to liquid-phase Ni nanobar [6]. Furthermore, unique optoelectrical property, known as persistent photoconductivity (PPC), is also observed in our suspended GNR devices. By using the PPC, GNR-based non-volatile memory operation is demonstrated. We believe that our results can contribute to pushing the study of atomically thin layered materials from basic science into a new stage related to the optoelectrical applications [7-9] in industrial scale.

Original languageEnglish
Title of host publicationJSAP-OSA Joint Symposia, JSAP 2018
PublisherOptica Publishing Group (formerly OSA)
ISBN (Print)9784863486942
Publication statusPublished - 2018
Externally publishedYes
EventJSAP-OSA Joint Symposia, JSAP 2018 - Nagoya, Japan
Duration: Sept 18 2018Sept 21 2018

Publication series

NameOptics InfoBase Conference Papers
VolumePart F125-JSAP 2018
ISSN (Electronic)2162-2701


ConferenceJSAP-OSA Joint Symposia, JSAP 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials


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