新型硼－碳－氮二维原子层的同步辐射表征

项目名称： 新型硼－碳－氮二维原子层的同步辐射表征

项目编号： No.U1232131

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 宋礼

作者单位： 中国科学技术大学

项目金额： 60万元

中文摘要： 二维层状纳米材料具有广阔的应用前景，是目前国际上研究的热点，而对新型层状材料的表征是其进一步研究和应用的基础。硼、氮、碳三种元素具有相似的原子半径，理论计算表明它们可以相互替代，从而形成多种具有优异性能的六角形层状新结构。本项目，我们将在以往石墨烯和六角氮化硼研究的基础上，合成新型硼－碳－氮杂化二维层状结构，应用合肥同步辐射光源的多种先进检测手段，分析硼－碳－氮杂化新材料的电子结构、显微结构和生长机理。通过同步辐射X射线近边结构吸收谱、X射线高分辨成像等手段，研究硼、碳、氮三种元素的键合形态，给出吸收原子近邻配位原子的结构信息，逐步理解硼－碳－氮杂化层状纳米结构的合成机理，从而指导新型硼-碳－氮纳米结构的可控合成。本项目的研究将拓展同步辐射技术在纳米新材料和新结构检测中的广泛应用，为发展新的同步辐射检测手段提供新的机会，并为二维层状纳米结构的合成提供新的途径和方法。

中文关键词： 二维层状新材料；结构调控；同步辐射表征；物理化学性能；理论模拟

英文摘要： Two-dimensional (2D) layered architectures have attracted considerable attention recently, because their planar geometry is compatible with wafer-level processing. Due to similar atomic parameters, theoretical reports showed that boron (B), carbon (C) and Nitrogen (N) can substitute with each other and form various new hexagonal layered structures. More interestingly, these B-C-N hybridized nanostructures were predicted to pose unique and fascinating properties. In this proposed research, we seek to synthesize 2D atomic sheets of B-C-N complexes and characterize them using various means of synchrotron radiation, including X-ray Absorption Near Edge Spectroscopy (XANES), high-resolution X-ray imaging and X-ray photon Spectroscopy (XPS), etc. Our experimental studies of these 2D atomic sheets of B-C-N complexes can reveal the fundamental physics related to the properties of graphene based systems. Through the means of synchrotron radiation, we will achieve structural and bonding information of B-C-N hybrid sheets, which will provide useful information to have better understanding on the growth mechanism and tour further controllable growth of new B-C-N atomic layered-structures. These new classes of 2D B-C-N crystals will also have high potential engineering applications for next generation of electronics and opti

英文关键词： Two dimensional layered materials；structural engineering；ynchrotron Radiation-based characterizations；physical and chemical properties；simulations