van der Waals adhesion of graphene membranes
van der Waals adhesion of graphene membranes
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DOI：
10.1063/1.3270425
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发表时间：
2010-02-15
影响因子：
3.2
通讯作者：
Dunn, Martin L.
中科院分区：
文献类型：
--
作者：
Lu, Zhixing;Dunn, Martin L.
我们研究了石墨烯和其他超薄薄膜在范德华力的作用下附着在具有开放空腔的衬底上的纳米力学，并受到导致拉伸、解粘和/或滑动的机械载荷(集中或压力)。我们开发了分析模型来描述与最近纳米力学实验中观察到的平衡构型相似的平衡构型，以及在机械加载时发生的各种变形区域。我们将分析模型应用于单层石墨烯，并对附着在衬底上的石墨烯进行了原子模拟，以验证模型并说明操作现象。我们获得了理论和原子模拟之间的良好一致性，并确定了范德华附着能、膜弹性、几何形状和载荷对膜从衬底和/或沿衬底滑动的脱粘的影响。
We study the nanomechanics of graphene and other ultrathin membranes adhered to substrates with open cavities by van der Waals forces, and subjected to mechanical loads (concentrated or pressure) that cause stretching, decohesion, and/or sliding. We develop analytical models to describe equilibrium configurations similar to those observed in recent nanomechanical experiments, as well as various deformation regimes that occur upon mechanical loading. We apply the analytical models to single layers of graphene and carry out atomistic simulations of graphene adhered to a substrate to validate the models and illustrate the operative phenomena. We obtain excellent agreement between theory and atomistic simulations and identify the influence of van der Waals adhesion energy, membrane elasticity, geometry, and loading on membrane decohesion from and/or sliding along a substrate.