【作者】 汪洋； 程昱； 王韫璐； 张帅； 徐晨； 张学薇； 尹少骞； 应林炜； 宋也男； 李群仰； 赵沛； 王宏涛；

【Author】 Yang Wang;Yu Cheng;Yunlu Wang;Shuai Zhang;Chen Xu;Xuewei Zhang;Shaoqian Yin;Linwei Yin;Yenan Song;Qunyang Li;Pei Zhao;Hongtao Wang;Institute of Applied Mechanics;Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Zhejiang University;Center for Nano and Micro Mechanics, Applied Mechanics Laboratory,School of Aerospace Engineering, Tsinghua University;

【机构】 浙江大学应用力学研究所； 浙江省软体机器人与智能器件研究重点实验室； 清华大学航空航天工程学院纳米微观力学中心应用力学实验室；

【摘要】 石墨烯作为当前最新最热的材料之一,近年来迅猛发展。我们通过化学气相沉积法在铜箔衬底上制备石墨烯薄膜,对单点形核与取向一致阵列两种方式生长的大面积单晶石墨烯以及石墨烯拉伸的拉曼表征进行了研究。多晶石墨烯中的畴界是影响其电学和力学性能的主要原因,通过单点形核制备的石墨烯薄膜,石墨烯晶畴平均尺寸可以达到约1.7mm,并且能够形成连续的石墨烯薄膜。而通过取向一致阵列方法制备大尺寸石墨烯单晶,通过将普通铜箔表面单晶化,制备出取向一致的六边形石墨烯点阵,再将其无缝拼接在一起形成大面积石墨烯单晶,大大加快了大面积单晶石墨烯生长速率,且尺寸最大可以达到厘米级。最后利用上述样品,我们对其进行了柔性基底表面的拉伸,通过设计新型界面缓冲层,实现了石墨烯与柔性基底间应力的有效传递,为石墨烯未来在柔性电子中的更高效应用提供了可能。更多还原

【Abstract】 Graphene is one of the dramtic materials. In recent years, scalable techniques have been developed. We have prepared graphene films on copper foil subsyrates by chemical vapor deposition. We research single point nucleation and aligned hexagonal domains to grow large area single crystal graphene and study the stretching of graphene by the Raman spectrum. The domain boundary in polycrystalline graphene is the main factor affecting the electrical and mechanical properties of graphene. In our research, the average domain size of graphene can reach about 1.7 mm, and the continuous graphene film can be formed. We grow the the aligned hexagonal graphene domains by changing the surface of copper foil crystallized. And then the millimeter-sized unidirectional aligned hexagonal domains is seamlessly stitched which promote the growth rate of large area single-crystal graphene and the largest size can reach centimeter level. Finally, we stretch the graphene on the flexible base surface and achieve the effective transfer of stress between graphene and flexible substrate. This provides the possibility for graphene to be used more efficiently in flexible electronics in the future.更多还原