TY - GEN
T1 - Wafer-scale synthesis and optoelectrical applications of bottom-up graphene nanoribbons
AU - Kato, Toshiaki
AU - Suzuki, Hiroo
AU - Kaneko, Toshiro
N1 - Publisher Copyright:
© 2018 OSA - The Optical Society. All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85065859821&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065859821&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85065859821
SN - 9784863486942
T3 - Optics InfoBase Conference Papers
BT - JSAP-OSA Joint Symposia, JSAP 2018
PB - OSA - The Optical Society
T2 - JSAP-OSA Joint Symposia, JSAP 2018
Y2 - 18 September 2018 through 21 September 2018
ER -