透射电镜三维重构确定金纳米粒子的立体结构  

Electron Tomography Identification of 3D Structure of Au Nanoparticles by Transmission Electron Microscopy

作　　者：唐明华[1] 郭军[1] 陈木子[1] 

机构地区：[1]苏州大学分析测试中心,江苏苏州215123

出　　处：《分析科学学报》2017年第4期499-502,共4页Journal of Analytical Science

基　　金：国家自然科学青年基金(No.21301333);实验室安全及设备管理教改项目(No.58333007)

摘　　要：贵金属纳米颗粒具有局域表面等离激元这一特性使其具有丰富的光学性质,而这一特性受制于纳米颗粒所形成的立体几何形状,而透射电镜和扫描电镜的二维图像不能真切地观测和确定纳米颗粒所形成的立体几何结构。透射电镜三维重构技术可作为一种确定纳米颗粒立体结构的直观有效的方法。本文利用透射电镜的三维重构技术,选择合适的参数进行二维图像的采集、图像匹配对中及重构、立体模型的构建,从而通过构建的模型对两种金纳米颗粒样品的不同几何形状所产生的边界形态进行了确认和分析。Noble metal nanostructures possess rich optical properties due to their localized surface plasmon resonances,which are determined by the geometry of nanostructures.However,two-dimensional TEM and SEM images obtained by transmission electron microscopy and scanning electron microscopy could not show the 3Dstructural information of noble metal nanostructures.Electron tomography is an intuitive and effective technique for three-dimensional structure determination of nanostructures.In this article,we select and adjust proper parameters for the acquisition,alignment and reconstruction of a series of TEM images,and briefly analyze and confirm high-resolution 3Dstructural information of Au nanoparticles with different geometry by the established 3D models using Electron tomography.

关 键 词：电子断层三维重构 透射电子显微镜 纳米金颗粒 立体几何结构 

分 类 号：O657[理学—分析化学]