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Tailoring the electronic properties of graphene by functionalization: Insights through optical and electron spectroscopy

通过功能化定制石墨烯的电子特性：光学和电子光谱的见解

基本信息

批准号：
158374870
负责人：
Professor Dr. Alexander Grüneis
金额：
--
依托单位：
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/158374870?language=en
关键词：
Tailoring electronic properties graphene functionalization

项目摘要

Since the discovery of two-dimensional and metastable graphene sheets, a dramatic increase in the research dedicated to explore its physical properties took place. This can be attributed to the two following reasons. First, graphene allows one to address basic questions of quantum electrodynamics, such as relativistic Dirac fermions or the Klein paradox in a bench-top condensed-matter experiment. Second, the nanometer size, the scalability and room-temperature ballistic transport properties make graphene a promising candidate for future nanoelectronic devices with high charge carrier mobilities and an ideal material for spintronics. In this project, the spectroscopic investigation of functionalized mono- and few-layer graphene (FLG) will be carried out using a combination of optical and electron spectroscopies as well as theoretical calculations. Particular emphasis will be paid to tailoring the electronic properties via controlled functionalization such as hydrogenation and adsorption of alkali metals and organic molecules. Controlled modification of the electronic properties of graphene is of prime importance for its applications as a transistor material, spin valve, gas sensor or molecular membrane. Our multi-disciplinary approach ensures that the results obtained will not only contribute to the understanding of doping effects but also yield valuable input for device physics based on graphene.

自从二维和亚稳态石墨烯薄片的发现以来，致力于探索其物理性质的研究急剧增加。这可以归因于以下两个原因。首先，石墨烯使人们能够解决量子电动力学的基本问题，例如相对论狄拉克费米子或台式凝聚态实验中的克莱因悖论。其次，石墨烯的纳米尺寸、可伸缩性和室温弹道传输特性使其成为未来具有高载流子迁移率的纳米电子器件的理想候选者，也是自旋电子学的理想材料。在本项目中，将结合光学和电子光谱以及理论计算，对功能化单层和少层石墨烯(Flg)进行光谱研究。将特别强调通过受控官能化来调整电子性质，例如碱金属和有机分子的氢化和吸附。石墨烯电子性质的可控修饰对其作为晶体管材料、自旋阀、气体传感器或分子膜的应用具有重要意义。我们的多学科方法确保所获得的结果不仅将有助于理解掺杂效应，还将为基于石墨烯的器件物理提供宝贵的输入。