Suzuki Hiroo, Ogura Noritada, Kaneko Toshiro, Kato Toshiaki
Department of Electronic Engineering, Tohoku University, Aoba 6-6-05, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
Japan Science and Technology Agency (JST)-PRESTO, Aoba 6-6-05, Aramaki, Aoba-ku, Sendai, 980-8579, Japan.
Sci Rep. 2018 Aug 7;8(1):11819. doi: 10.1038/s41598-018-30278-z.
Graphene nanoribbon (GNR), also known as 1-dimensional graphene, with a non-zero band gap has a huge potential for various electrical and optoelectrical applications because of its high transparency, flexibility, controllable band gap, and unique edge states. Recent advances in the synthesis of GNR enable us to show the possibility of GNRs as future high performance electrical devices. However, the applicability of GNRs to optoelectrical devices is unclear. Here we report that suspended GNR devices can show persistent photoconductivity (PPC) with long decay time (over 72 h) and adequate environmental stability. Repeated non-volatile memory operation is also demonstrated with an integrated PPC device using GNRs. This very stable PPC device can be applied to a wide variety of fields such as ultra-low-power non-volatile memory, nanoscale imaging, and biological sensors. Our results have opened the door to advance the study of GNRs in novel directions such as optoelectrical applications.
石墨烯纳米带（GNR），也被称为一维石墨烯，具有非零带隙，由于其高透明度、柔韧性、可控带隙和独特的边缘态，在各种电气和光电应用中具有巨大潜力。GNR合成方面的最新进展使我们能够展示其作为未来高性能电气设备的可能性。然而，GNR在光电器件中的适用性尚不清楚。在此我们报告，悬浮的GNR器件可表现出具有长衰减时间（超过72小时）且具有足够环境稳定性的持久光电导性（PPC）。使用GNR的集成PPC器件还展示了重复的非易失性存储操作。这种非常稳定的PPC器件可应用于超低功耗非易失性存储器、纳米级成像和生物传感器等广泛领域。我们的结果为在光电器件应用等新方向推进GNR的研究打开了大门。
