特集「二次元層状物質の成長とその場評価―真空・表面技術による高品質薄膜の実現を目指して―」
プラズマCVDによるグラフェンナノリボンのボトムアップ合成と光電子デバイス応用
2019 年 62 巻 10 号 p. 599-604
詳細
2019 年 62 巻 10 号 p. 599-604
We have developed a new method based on novel plasma catalytic reaction for directly fabricating narrow graphene nanoribbon (GNR) devices. Since the establishment of our novel GNR fabrication method, GNRs can be grown at any desired position on an insulating substrate without any post-growth treatment, and the wafer-scale synthesis of suspended GNR arrays with a very high yield (over 98%) is realized. 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. 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 GNRs from basic science into a new stage related to the optoelectrical applications in industrial scale.
