铁系多面体纳米晶的生长控制及其电磁性质依赖性研究

项目名称： 铁系多面体纳米晶的生长控制及其电磁性质依赖性研究

项目编号： No.21471076

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 陆轻铱

作者单位： 南京大学

项目金额： 90万元

中文摘要： 纳米材料的性能不仅和其形貌尺寸有关，还强烈依赖于其表面结构和环境。不同于球形纳米材料，多面体通常由某种或某几种晶面组成，其表面环境单一，性能特点突出。其中高指数晶面外露的多面体更因为其高能面的外露有可能带来不同寻常的优异性能。这使得在相似反应条件下合成一系列不同晶面 (包括高指数晶面) 外露的多面体材料非常重要。然而，当前多面体合成方法的普适性和可调性不强。对高指数外露的多面体的研究大都集中在金属、TiO2和SnO2多面体的合成及其催化性质研究上，对具有丰富晶体结构和电磁学性能的铁系多面体纳米晶的研究非常少。本项目拟开发普适的方法，在相似的环境中生长不同晶面(包括高指数晶面)外露的铁系多面体纳米晶，寻找其晶面与电磁性质之间的对应关系。本项目的开展不仅有可能获得具有优异性能的纳米材料，而且为理论研究晶体生长过程以及定向设计合成功能纳米材料提供物质基础。

中文关键词： 铁系多面体纳米晶；高指数晶面；电磁性质

英文摘要： The property of nanomaterials depends not only on their morphology and size, but also strongly on their surface structure and environment. Different from spherical nanomaterials, polyhedron, usually surrounded by one or several kinds of crystal facets, has simple surface environment and thus enhanced performances. Especially, the polyhedron surrounded by high-index crystal facets might display outstanding properties because of their exposed high energy facets. These make the synthesis of a series of polyhedron surrounded by different exposed crystal facets, including high-index crystal facets, under similar conditions very important. However, the current methods for the synthesis of polyhedron have low universality and adjustability. The current study on the polyhedron with exposed high-index facets usually focused on the synthesis and catalysis properties of metal, TiO2 and SnO2. The investigations on Fe-series polyhedrons which have more crystal structures and richer electric and magnetic properties are far less than needed. In this project, we will intend to develop universal methods to synthesize a series of Fe-series polyhedrons with different exposed crystal facets (including high-index crystal facets) under similar conditions, and seek the relationship between crystal facet and electric and magnetic properties. This project might not only bring new nanomaterials with excellent properties but also benefit the study on crystal growth process and the directional design and synthesis of functional nanomaterials.

英文关键词： Fe-series nano-polyhedron;high-index facet;electric-magnetic property