基于磁性金属的多组元复合纳米晶的形成机制、界面结构及其磁学和光学特性研究

项目名称： 基于磁性金属的多组元复合纳米晶的形成机制、界面结构及其磁学和光学特性研究

项目编号： No.51471137

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： 陈远志

作者单位： 厦门大学

项目金额： 83万元

中文摘要： 在纳米尺度上对不同结构组元进行成分和结构的合理设计，制备具有特定结构和多功能特性的复合纳米晶材料是当前纳米材料研究的重要热点之一。本项目拟采用化学液相法制备低缺陷、高结晶性、形状可控的磁性金属纳米单晶体，并以此为晶种诱导生长币族金属和半导体纳米晶，从而获得结构新颖、可控的多组元复合纳米晶。系统地研究磁性金属纳米单晶体形成的条件，揭示复合纳米晶的形成机制，阐明异质组元实现外延生长的规律；通过先进的电子显微分析技术分析异质界面的特性，确定其结构模型；重点表征复合纳米晶的磁学和光学特性，澄清异质界面的形成与复合纳米晶物理性能的关系；进行光催化等方面的应用测试，为异质组元按照特定的空间分布，在纳米尺度上形成兼有磁、光、催化等多种功能特性的多组元复合纳米晶的制备提供理论上的指导，同时为基于磁性金属的复合纳米晶材料的性能提升，以及拓展其在众多领域的应用提供新思路。

中文关键词： 磁性材料；纳米复合材料；纳米晶；形成机制；磁性能

英文摘要： The preparation of hybrid nanocrystals with specific structure and multiple functionalities by rational design in nanoscale on the composition and structure of different consisting components has become an important research area in nanomaterial researches in recent years. In this project, chemical solution methods will be used to prepare magnetic metal single-crystalline nanocrystals with low-concentration of defects, high crystallinity and controllable shapes. Then the prepared magnetic metal single-crystalline nanocrystals will be used as seeds to grow coin metal and semiconductor nanocrystals to form hybrid nanocrystals with novel and controllable structure. The key preparation parameters for the synthesis of magnetic metal single-crystalline nanocrystals and the formation mechanism of hybrid nanocrystals will be studied. The rules for the epitaxial growth of hetero-components will be explored. The interface characteristics of hybrid nanocrystals will be investigated by advanced analytic electron microscopy and their structural models will be derived. The magnetic and optical properties will be characterized by multiple analytic techniques and the relationship between interface and their physical properties will be clarified. Finally the prepared hybrid nanocrystals will be tested on their applied functionalities such as photocatalysis. The proposed project will provide theoretic guides on the preparation of hybrid nanocrystals with specific spatial distribution of hetero-components and multiple functionalities such as magnetic, optical and catalytic properties. It is also meaningful for improving the properties of magnetic metal-based hybrid nanocrystals and promoting their applications in multiple fields.

英文关键词： Magnetic materials;Nanohybrid materials;Nanocrystals;Formation mechanism;Magnetic properties