The in situ investigation of the dynamic growth process and novel assembly phenomena of graphene on liquid copper (Cu) is of great significance to deeply understand the special behavior of graphene and self-assembly mechanism. Here, the direct observation of the graphene growth and motion behavior on liquid Cu via in situ imaging is reported. Evidence of graphene movement on liquid Cu is offered and it is demonstrated that the translation and rotation behaviors of graphene are affected by the surface condition of liquid Cu. The self-assembly process of graphene array is also revealed by capturing the dynamic changes of graphene in real-time. Further analysis highlights the importance of surface energy of liquid Cu and the interaction between graphene building blocks during the self-assembling process. The growth parameters are also investigated to flexibly control the assembly configuration of graphene arrays. This work provides an insight into the mechanism of graphene motion and assembly behavior that can be used to guide the controllable manipulation of 2D materials and on-demand fabrication assembly structures with desired properties.

中文翻译：

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石墨烯在液态铜上的运动行为的原位研究

石墨烯在液态铜（Cu）上的动态生长过程和新组装现象的原位研究对于深入了解石墨烯的特殊行为和自组装机制具有重要意义。在这里，报道了通过原位成像直接观察液态铜上石墨烯的生长和运动行为。提供了石墨烯在液态铜上运动的证据，并证明了石墨烯的平移和旋转行为受液态铜表面条件的影响。通过实时捕捉石墨烯的动态变化，还揭示了石墨烯阵列的自组装过程。进一步的分析强调了液态铜的表面能和自组装过程中石墨烯构件之间相互作用的重要性。还研究了生长参数以灵活控制石墨烯阵列的组装配置。这项工作提供了对石墨烯运动和组装行为机制的深入了解，可用于指导二维材料的可控操作和具有所需特性的按需制造组装结构。