石墨烯及其掺杂技术研究..doc

摘要 石墨烯是由sp2杂化碳原子构成的一种具有蜂窝状六方点阵结构的二维纳米材料，独特的结构使其具有优异的热学、机械和电学等性能。因此，研究者对石墨烯未来在纳米电子学、材料科学、凝聚态物理以及低维物理方面的应用产生了广泛的兴趣，但本征石墨烯在电子领域的应用受限于它的零带隙特性，获得带隙在一定范围内可调节石墨烯显得尤为重要。为了打开石墨烯的带隙，研究者探索了许多方法，比如剪裁石墨成量子点、纳米带、纳米网格或者把石墨烯铺到特殊的衬底上，其中一个最可行的方法就是通过掺杂来调控石墨烯的电学性质。 本文从石墨烯的结构特性出发，综述了石墨烯的各种制备、表征方法以及应用情况，特别是对石墨烯的制备方法进行了详细的阐述，因为石墨烯的制备质量与产量对其后续的性能研究与应用进展有着直接的影响。在全面了解了石墨烯的制备、表征和应用之后，本文对石墨烯掺杂的研究进行了分析，重点对氮掺杂石墨烯的制备和应用进展进行了探讨。最后指出了石墨烯在制备和掺杂方面存在的一些问题和以后的发展方向。 关键词：石墨烯，带隙，掺杂 Abstract Graphene, a two-dimensional (2D) network of sp2 hybridized carbon atom spacked into hexagonal structure, is a basic building block for graphitic materials of all other dimensionalities. The unique structure yields extraordinary thermal, mechanical, and electrical properties, an enormous effort has been devoted to exploration of its many applications in nanoelectronics, materials science, condensed-matter physics, and low-dimensional physics. However, most electronic applications are handicapped by the absence of a bandgap in the intrinsic material. In the quest to opening and tuning an energy gap in graphene, various approaches have been developed to improve the semiconducting properties, exemplified by forming confined geometries of quantum dots, nanoribbons, and nanomesh, or binding graphene to particular substrates. One of the most feasible methods to control the semiconducting properties of graphene is by doping，which is a process intentionally used to tailor the electrical properties of intrinsic semiconductors. Based on the structure and characteristics of graphene, this paper summarized the preparation, characterization methods and applications of graphene, especially the preparation of graphene is carried on the detailed elaboration, for the quality and yield of graphene on its subsequent performance has a direct influence on its research and application progress. In a comprehensive understanding of the preparation, characterization and application of graphene, in this paper, the graphene doped