Collaborative Research: Measurements and Implications of Graphene Adhesion - A Coherent Study via Experiments and Modeling

这项资助为表征和操纵石墨烯的粘合性能提供了资金，石墨烯是一层密集堆积在蜂窝晶格中的碳原子，已被证明具有非凡的机械，光学，热和电子特性。附着力决定了周围材料上的石墨烯形态，这又与石墨烯的电子和机械性能密切相关。然而，石墨烯的粘附特性在很大程度上尚未被探索，部分原因是传统的粘附度量在处理极小尺寸的样品时变得不合适。该项目通过直接从放置在图案化基底表面和纳米级支架上的石墨烯的形态中提取粘合剂特性，绕过了先前的限制。将开发一种计量学来测量石墨烯和各种材料之间的粘附力，特别是使用非平坦基底上的形态变化。将确定影响石墨烯粘附到表面的材料、形态和环境因素。将开发使用表面结构来操纵石墨烯的机械性能的方法。将通过整合实验的研究框架（例如，原子力显微镜、电子传输、拉曼光谱）和理论（例如，多尺度理论和数值模拟）。目前，人们对探索石墨烯在下一代电子产品和先进复合材料中的应用非常感兴趣。粘附在石墨烯与其他材料之间的相互作用中起着关键作用，因此是未来石墨烯器件和应用成功的关键。如果成功，该项目将有助于理解石墨烯粘附力和形态之间的相互作用，这也可能对其他石墨烯特性产生影响。在这个项目中开发的充满活力的框架和实验协议可以很容易地适应其他的薄膜，因此有可能影响计量技术的广泛的其他功能材料。

This grant provides funding for characterizing and manipulating the adhesive properties of graphene, a single layer of carbon atoms densely packed into a honeycomb lattice that have been shown to have extraordinary mechanical, optical, thermal and electronic properties. Adhesion dictates graphene morphology on surrounding materials, which is in turn closely tied to the electronic and mechanical properties of the graphene. However, the adhesive properties of graphene are largely unexplored, partly because the traditional metrologies of adhesion become unsuitable when dealing with samples of extremely small dimensions. This project bypasses previous limitations by extracting adhesive properties directly from the morphology of graphene placed on patterned substrate surfaces and nano-scale scaffolds. A metrology will be developed to measure the adhesion between graphene and a wide-range of materials, particularly using morphological changes on non-flat substrates. The material, morphological, and environmental factors that influence graphene adhesion to surfaces will be determined. Methods will be developed to manipulate the mechanical properties of graphene using surface structures. Results will be achieved through a research framework that integrates experiments (e.g., atomic force microscopy, electronic transport, Raman spectroscopy) and theory (e.g., multi-scale theoretical and numerical modeling). There is currently great interest in exploring applications for graphene in next-generation electronics and advanced composite materials. Adhesion plays a pivotal role in the interplay between graphene and other materials, so is a key to the success of future graphene devices and applications. If successful, this project will contribute to an understanding of the interplay between graphene adhesion and morphology which could also have implications for other graphene properties. The energetic framework and experimental protocols developed in this project can be readily adapted to other ultrathin films, and thus have the potential to impact metrology techniques for a wide range of other functional materials.