Didar Behnaz Rahmani, Khosravian Homa, Balbuena Perla B
Artie McFerrin Department of Chemical Engineering, Texas A&M University College Station Texas 77843 USA
RSC Adv. 2018 Aug 3;8(49):27825-27831. doi: 10.1039/c8ra05478a. eCollection 2018 Aug 2.
Repeated thermal cycling by using an organic precursor is shown to be a successful technique for growing graphene on metal substrates. Having control on this process is of vital importance in producing large areas of high quality graphene with well-ordered surface characteristics, which leads us to investigate the effect of temperature on the microscopic mechanisms behind this process. Apart from being an important factor in the dissociation of the organic precursor and promoting the reactions taking place on the surface of the catalyst, temperature also plays a major role in the structure of the catalyst surface. First, we used eight thermal cycles to successfully grow graphene on the surface of Cu (111). Then, we employed Molecular Dynamics (AIMD) simulations to study graphene island alignment evolution at two temperatures. The results shed light on our experimental observations and those reported in the literature and point to the effectiveness of controlled thermal cycling in producing high quality graphene sheets on transition metal catalyst surfaces.
通过使用有机前驱体进行反复热循环被证明是在金属基底上生长石墨烯的一种成功技术。控制这一过程对于生产具有有序表面特征的大面积高质量石墨烯至关重要，这促使我们研究温度对该过程背后微观机制的影响。除了是有机前驱体解离以及促进催化剂表面发生反应的重要因素外，温度在催化剂表面结构中也起着主要作用。首先，我们使用八个热循环在Cu(111)表面成功生长了石墨烯。然后，我们采用分子动力学（AIMD）模拟来研究在两个温度下石墨烯岛排列的演变。结果为我们的实验观察以及文献报道提供了启示，并指出了控制热循环在过渡金属催化剂表面生产高质量石墨烯片方面的有效性。
