Kim Ji Hoon, Kim Ji Min, Lee Gil Won, Shim Gyu Hyeon, Lim Sun Taek, Kim Koung Moon, Nguyen Vo Thi To, Kweon Boyeon, Wongwises Somchai, Jerng Dong Wook, Kim Moo Hwan, Ahn Ho Seon
Department of Mechanical Engineering, Incheon National University, Incheon 22012, Republic of Korea.
Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea.
ACS Nano. 2021 Feb 23;15(2):2839-2848. doi: 10.1021/acsnano.0c08806. Epub 2021 Feb 3.
Currently, researchers are paying much attention to the development of effective 3D graphene for applications in energy storage and environmental purification. Before commercialization, however, it is necessary to develop a method that allows for the large-scale production of such materials and enables good control over their structural and chemical properties. With this objective, we herein developed a simple method for the formation of large-scale (4 in. wafer) 3D graphene networks via the self-assembly of graphene sheets at a superheated liquid-vapor interface. The structural morphology of this porous network could be modified by controlling the vaporization rate, surface temperature of the target substrate, and amount of discharged colloids. The key mechanism behind this intriguing result was investigated by high-speed visualization of microdroplet behavior and extensive thermal analysis. This self-assembled 3D graphene had excellent electrical and mechanical properties. Our approach can be directly used for the mass production of graphene-based materials.
目前，研究人员十分关注用于能量存储和环境净化应用的高效3D石墨烯的开发。然而，在商业化之前，有必要开发一种能够大规模生产此类材料并能对其结构和化学性质进行良好控制的方法。出于这一目的，我们在此开发了一种简单的方法，通过石墨烯片在过热液-气界面的自组装来形成大规模（4英寸晶圆）3D石墨烯网络。通过控制蒸发速率、目标基板的表面温度和排出胶体的量，可以改变这种多孔网络的结构形态。通过对微滴行为的高速可视化和广泛的热分析，研究了这一有趣结果背后的关键机制。这种自组装的3D石墨烯具有优异的电学和力学性能。我们的方法可直接用于石墨烯基材料的大规模生产。
