利用球差校正透射电镜表征磷烯的原子和电子结构

项目名称： 利用球差校正透射电镜表征磷烯的原子和电子结构

项目编号： No.51472215

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 金传洪

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 原子尺度的结构-性能关联表征是二维原子晶体研究中的重要基础之一。本项目立项针对磷烯这一新型二维半导体材料，拟采用球差校正电镜成像 和电子能量损失谱在内的多种显微表征技术，确定层厚和层内起伏，完成本征结构原子分辨表征。研究结构缺陷和掺杂对磷烯局域原子结构的影响，及其稳定性研究。利用动量分辨高能量分辨电子能量损失谱研究材料的各向异性对其电子结构的影响，研究结构缺陷和掺杂对磷烯性能的调制。基于离子和电子束辐照结构加工方法制备磷烯的新结构-纳米带等及其边缘结构调控。目前课题组在单层磷烯的制备和拉曼表征上已取得重要前期进展，在石墨烯、六方氮化硼和二硫化钼的原子分辨结构和电子结构表征方向具有很好的工作基础，所在的浙江大学电镜中心已引进两台本项目开展所需的球差校正电镜。我们希望通过四年时间的努力，在磷烯的原子尺度表征方向上取得一系列重要的原创性成果，发表影响因子大于7以上的论文10篇以上。

中文关键词： 二维原子晶体；磷烯；原子和电子结构；球差校正透射电镜

英文摘要： Structure-property correlation on the atomic scale is one of the fundamental issues in the research of 2D atomic crystals.We will focus on phosphorene-an novel 2D semiconductor in this project. By employing the state-of-art aberration-corrected S/TEM, EELS and other associated techniques, we are planning to determine the sample thickness, ripples and lattice atoms. Special efforts will be directed to study the impact of structural defects (like topological defects and grain boundaries) on the local structures and electronic structures of phosphorene, and the stability of these defects as well. Novel methods based on enegetic ion and electron irradiaiton to tailor the structure of phosphorene, such as the formation of nanoribbons and atomic-chains will also be proposed. Up to now, we have demonstrated the first successful experimental approach to fabricate monolayer phosphorene and its Raman spectroscopy characterizations.We have also established a solid background and accumulated rich experience from our past research on studying other 2D materials like graphene, hexagonal boron nitride and molebdeum disulfide with advanced electron microscopy and EELS. Currently, there are two aberration-corrected S/TEMs installed in the Center of Electron Microscopy of Zhejiang University, where our group is located. These two microscopes will fulfill most of our needs on the planned work in this project. After four-years hard-work as supported by this grant, we wish to accomplish a series of important research resuts with high originalities ,including publish 10+ papers on high-impact journals (imptact factor > 7) and become one of the leading groups in the community on studying the microstructures of phosphorene.The results and knowledge gained from this project will be essential for the application of phosphorene as a building block of future nanoelectronic and nanooptoelectronic devices.

英文关键词： two-dimensional atomic crystal;phosphorene;atomic and electronic structure;aberration corrected transmission electron microscopy