Thermal and thermoelectric properties of graphene

石墨烯的热学和热电性质

• 批准号: 0756359
• 负责人: Chris Dames
• 金额: $ 5万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0756359&HistoricalAwards=false
• 关键词: Thermal; thermoelectric; properties; graphene

CBET-0756359, Dames The goal of this one-year project is to measure the thermal conductivity of graphene: a sheet of carbon that is only one atom thick. Although graphene is well-known as the building block of graphite, it was not until 2004 that individual sheets of graphene were successfully isolated. Since then, graphene has generated tremendous interest for both fundamental and applied reasons. On the fundamental side, the electrons in graphene exhibit some unique behaviors that are more like light than normal electrons in metals or semiconductors. On the applications side, graphene is a very good electrical conductor which can also tolerate extremely high currents, making graphene an exciting candidate to transform the post-silicon microelectronics era. In analogy to its cousin, the carbon nanotube, graphene is also thought to be a very good thermal conductor, which would also be a great benefit for microelectronics, as well as thermal management applications. However, this important property has not yet been measured. Intellectual Merit:The intellectual merit of the proposed work is to provide the first experimental measurements of the thermal properties of this unique and important material. By studying the thermal conductivity as a function of temperature, the number of layers, and the electron concentration, this work will resolve conflicting theoretical predictions and lead to a deeper understanding of graphene?s remarkable electronic and thermal properties. This study is potentially transformative to our fundamental knowledge because the properties of a sheet that is only one atom thick may be quite different than familiar bulk materials, or even ?conventional? nanostructures such as nanowires and thin films. Broader Impacts:The proposed research may be expected to have major impacts on society if graphene replaces silicon in next-generation microelectronics. This project will also help support two different research groups, in physics and mechanical engineering, leading to a stimulating exchange of ideas and skills across disciplines as the two graduate students collaborate. The results obtained will be disseminated widely in journals and at conferences, and incorporated into three classes taught by the principal investigators.

CBET-0756359，这一一年项目的目标是测量石墨烯的导热率：仅一个原子厚的碳片。 尽管石墨烯众所周知是石墨的基础，但直到2004年，单个石墨烯才成功隔离。 从那时起，石墨烯出于基本和应用原因引起了极大的兴趣。 在基本方面，石墨烯中的电子表现出一些独特的行为，这些行为比金属或半导体中的正常电子更像光。 在应用方面，石墨烯是一个非常好的电导体，也可以耐受极高的电流，使石墨烯成为改变后硅后微电子时代的令人兴奋的候选者。 与表弟类似，碳纳米管也被认为是一个非常好的热导体，这对于微电子和热管理应用也是一个很好的好处。 但是，尚未衡量这个重要的属性。 智力优点：拟议工作的智力优点是提供对这种独特和重要材料的热性能的第一个实验测量。 通过研究温度，层数和电子浓度的函数，这项工作将解决相互矛盾的理论预测，并使对石墨烯具有更深入的电子和热性能的深入了解。 这项研究可能对我们的基本知识有可能变化，因为只有一个原子厚的纸的特性可能与熟悉的散装材料，甚至是传统的材料大不相同？纳米结构，例如纳米线和薄膜。 更广泛的影响：如果石墨烯取代了下一代微电子学中的硅，则建议的研究可能会对社会产生重大影响。 该项目还将有助于支持两个不同的研究小组，即物理和机械工程学，从而导致两位研究生合作的刺激性交流思想和技能。 获得的结果将在期刊和会议上广泛传播，并将其纳入由主要研究人员教授的三个类中。