The role of edge termination is theoretically studied for the growth direction selectivity in chemical vapor deposition of graphene heterostructures with hexagonal boron nitride. It is found that the graphene island with hydrogen-free edge and the hexagonal boron nitride island with hydrogen-terminated edge induces the lateral and the vertical growth of the heterostructures we have experimentally observed. The mechanism of the different edge terminations is also discussed based on the H adsorption kinetics.

中文翻译：

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铜表面hBN/石墨烯异质结构化学气相沉积边缘终止对生长方向选择性作用的理论研究

从理论上研究了边缘终止在六方氮化硼石墨烯异质结构化学气相沉积中的生长方向选择性。发现具有无氢边缘的石墨烯岛和具有氢终止边缘的六方氮化硼岛诱导了我们实验观察到的异质结构的横向和垂直生长。还基于 H 吸附动力学讨论了不同边缘终止的机制。