HOPG机械剥离石墨片中机械屈曲诱导的周期性扭折/条纹微结构
Mechanical buckling induced periodic kinking/stripe microstructures in mechanically peeled graphite flakes from HOPG
摘要：
机械剥离是从块状石墨中分离高质量石墨烯层的广泛使用的方法。在我们最近的实验中，一些有序的微观结构，包括周期性交替的扭结和条纹，观察到在薄石墨片，机械剥离高度取向的热解石墨（HOPG）。本文提出了一个理论模型来理解这种有序的微观结构的形成，基于弹性屈曲的石墨薄片受到弯矩。从这个模型预测的条纹的宽度与我们的实验测量相当吻合。
英文摘要：
Mechanical exfoliation is a widely used method to isolate high quality graphene layers from bulk graphite. In our recent experiments, some ordered microstructures, consisting of a periodic alternation of kinks and stripes, were observed in thin graphite flakes that were mechanically peeled from highly oriented pyrolytic graphite (HOPG). A theoretical model is presented in this paper to understand the formation of such ordered microstructures, based on elastic buckling of a graphite flake being subjected to a bending moment. The width of the stripes predicted from this model agrees reasonably well with our experimental measurements.
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