arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0907.1639cond-mat.mtrl-scicond-mat.mes-hall
收藏

石墨烯的衬底调控形貌

Substrate-regulated morphology of graphene

Teng Li, Zhao Zhang

摘要:

我们描绘了一个一般的理论框架,以确定通过能量最小化的衬底调控的石墨烯形态。然后,我们应用这样的框架来研究周期性的表面凹槽衬底上的石墨烯形态。取决于基底表面粗糙度和石墨烯-基底界面结合能,石墨烯的平衡形态在1)紧密贴合基底至2)在基底上保持平坦的范围内。有趣的是,在某些情况下,石墨烯形态在上述两个极限状态之间发生突变。我们的定量结果设想了一种很有前途的策略,以精确控制大面积的石墨烯形态。基底调节的石墨烯形态的丰富特征(例如,突变不稳定性)可以潜在地导致功能性石墨烯器件部件的新设计概念。

英文摘要:

We delineate a general theoretical framework to determine the substrate-regulated graphene morphology through energy minimization. We then apply such a framework to study the graphene morphology on a substrate with periodic surface grooves. Depending on the substrate surface roughness and the graphene-substrate interfacial bonding energy, the equilibrium morphology of graphene ranges from 1) closely conforming to the substrate, to 2) remaining flat on the substrate. Interestingly, in certain cases, the graphene morphology snaps between the above two limiting states. Our quantitative results envision a promising strategy to precisely control the graphene morphology over large areas. The rich features of the substrate-regulated graphene morphology (e.g., the snap-through instability) can potentially lead to new design concepts of functional graphene device components.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑