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，Dames 这个为期一年的项目的目标是测量石墨烯的热导率：石墨烯是一种只有一个原子厚的碳片。 尽管石墨烯作为石墨的组成部分而闻名，但直到 2004 年才成功分离出单片石墨烯。 从那时起，石墨烯因基础和应用原因而引起了极大的兴趣。 从根本上讲，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，石墨烯是一种非常好的电导体，还可以承受极高的电流，使石墨烯成为改变后硅微电子时代的令人兴奋的候选者。 与它的近亲碳纳米管类似，石墨烯也被认为是一种非常好的热导体，这对微电子学以及热管理应用也有很大好处。 然而，这一重要特性尚未得到测量。 智力优点：所提出的工作的智力优点是提供了这种独特且重要材料的热性能的首次实验测量。 通过研究热导率与温度、层数和电子浓度的函数关系，这项工作将解决相互矛盾的理论预测，并加深对石墨烯卓越的电子和热性能的理解。 这项研究可能会改变我们的基础知识，因为只有一个原子厚的片材的特性可能与熟悉的散装材料甚至“传统”材料有很大不同。纳米结构，例如纳米线和薄膜。 更广泛的影响：如果石墨烯取代下一代微电子器件中的硅，预计拟议的研究将对社会产生重大影响。 该项目还将帮助支持物理和机械工程领域的两个不同的研究小组，在两名研究生的合作中促进跨学科的思想和技能交流。 获得的结果将在期刊和会议上广泛传播，并纳入主要研究人员教授的三个课程中。