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

合作研究：石墨烯粘附力的测量和影响 - 通过实验和建模进行的连贯研究

• 批准号: 1129826
• 负责人: Teng Li
• 金额: $ 21.82万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1129826&HistoricalAwards=false
• 关键词: Collaborative; Research; Measurements; Implications; Graphene

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.

这笔赠款为表征和操纵石墨烯的粘合性能提供了资金，石墨烯是密集堆积在蜂窝晶格中的单层碳原子，已被证明具有非凡的机械、光学、热和电子性能。粘附力决定了石墨烯在周围材料上的形态，而这又与石墨烯的电子和机械性能密切相关。然而，石墨烯的粘合性能在很大程度上尚未得到探索，部分原因是传统的粘合计量在处理极小尺寸的样品时变得不合适。该项目通过直接从图案化基材表面和纳米级支架上的石墨烯形态中提取粘合特性，绕过了之前的限制。将开发一种计量方法来测量石墨烯和各种材料之间的粘附力，特别是利用非平坦基材上的形态变化。将确定影响石墨烯表面附着力的材料、形态和环境因素。将开发利用表面结构操纵石墨烯机械性能的方法。结果将通过整合实验（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建模）的研究框架来实现。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产生了浓厚的兴趣。粘附力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。该项目开发的能量框架和实验协议可以很容易地适应其他超薄膜，因此有可能影响各种其他功能材料的计量技术。