Determining graphene adhesion via substrate-regulated morphology of graphene
Determining graphene adhesion via substrate-regulated morphology of graphene
复制标题
DOI：
10.1063/1.3656720
复制
发表时间：
2011-10
影响因子：
3.2
通讯作者：
Zhao Zhang;Teng Li
中科院分区：
文献类型：
--
作者：
Zhao Zhang;Teng Li
了解石墨烯和其他材料之间的粘附对于在电子设备和纳米复合材料中实现更可靠的石墨烯应用至关重要。然而，石墨烯的超薄轮廓对使用常规方法直接测量其粘附特性提出了重大挑战。我们发现，在具有图案化表面的柔性衬底上的石墨烯的形态与石墨烯-衬底粘附力之间存在很强的相关性。我们建立了一个分析模型来定量地确定这种强相关性。结果表明，取决于石墨烯-基底粘附力、石墨烯层数和基底刚度，石墨烯表现出两种不同类型的形态：（I）石墨烯保持键合到基底并且波纹化到高达基底表面图案的振幅;（II）石墨烯从基底脱键并且在基底表面图案的顶部保持平坦。这两种类型的图形之间的急剧过渡。
Understanding the adhesion between graphene and other materials is crucial for achieving more reliable graphene-based applications in electronic devices and nanocomposites. The ultra-thin profile of graphene, however, poses a significant challenge to direct measurement of its adhesion property using conventional approaches. We show that there is a strong correlation between the morphology of graphene on a compliant substrate with patterned surface and the graphene-substrate adhesion. We establish an analytic model to quantitatively determine such a strong correlation. Results show that, depending on the graphene-substrate adhesion, number of graphene layers, and substrate stiffness, graphene exhibits two distinct types of morphology: (I) graphene remains bonded to the substrate and corrugates to an amplitude up to that of the substrate surface patterns; (II) graphene debonds from the substrate and remains flat on top of the substrate surface patterns. The sharp transition between these two types of graphe...