Probing the Adhesive Properties of Graphene

这笔赠款的研究目的是阐明石墨烯和其他材料之间的粘合作用，这些材料可能用于生产大面积的石墨烯，石墨烯是人类已知的最坚硬和最坚固的材料之一。界面作用力显微镜将被用来探测具有各种探测材料的各种衬底上的石墨烯。响应将由分子模型和连续介质模型相结合来模拟，以提取牵引力-分离关系作为这些相互作用的连续介质表示，这些相互作用既与接触面垂直，也与接触面相切。在IFM实验中遇到的接触半径通常为50-100 nm。然后将在断裂实验中解决放大问题，在断裂实验中，基板/石墨烯/基板在各种加载条件下分层，以检查较大区域上的石墨烯界面。一种特殊的高真空断裂设备将允许在一系列环境条件下检查这些相互作用。拟议的研究将提高我们定制集成材料和结构的粘附性、强度和耐用性的能力，这些材料和结构利用石墨烯进行新的应用。它还为研究其他类型的表面之间的相互作用奠定了基础，如化学修饰的石墨烯和功能化的碳纳米管。教育和外联活动将纳入拟议的项目，以加强其社会影响。

The research objective of this grant is to elucidate the adhesive interactions between graphene and other materials that might be used in producing large areas of graphene, one of the stiffest and strongest materials known to man. An interfacial force microscope will be used to probe graphene on a variety of substrates with a variety of probe materials. The response will be modeled by a combination of molecular and continuum models to extract traction-separation relations as the continuum representations of these interactions both normal and tangential to the contact surface. The contact radii encountered in IFM experiments are typically 50-100 nm. Scale up issues will then be addressed in fracture experiments where substrate/graphene/substrate laminates are delaminated in a variety of loading conditions, in order to examine the graphene interfaces over larger domains. A special high vacuum fracture facility will allow these interactions to be examined over a range of environmental conditions. The proposed research will advance our ability to tailor the adhesive characteristics, strength and durability of integrated materials and structures that make use of graphene for novel applications. It also lays the foundation for examining interactions among other types of surfaces such as chemically modified graphene and functionalized carbon nanotubes. Education and outreach activities will be integrated within the proposed project to enhance its societal impacts.