透射电镜铜网上类单晶Cu2S枝晶的生长机理研究  

Research on fractal growth of single-crystal-like Cu2S developed from copper grid

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作  者:朱国青 ZHU Guo-qing(Center of Electron Microscopy,and Department of Materials Science and Engineering,Zhejiang University, Hangzhou Zhejiang 310027, China)

机构地区:[1]浙江大学电子显微镜中心,浙江大学材料科学与工程学院,浙江杭州310027

出  处:《电子显微学报》2019年第1期22-26,共5页Journal of Chinese Electron Microscopy Society

摘  要:本文利用场发射透射电子显微镜,研究了铜网上所生成枝晶的晶体结构。结合CrystalMaker软件模拟电子衍射花样结果,确定该枝晶是由约5nm的小晶粒组成的介孔类单晶材料。另外,结合电子显微分析结果和定向吸附理论,分别从微观和宏观上对该枝晶的生长过程进行了合理推测并提出了Cu2S枝晶生长模型.In this paper, transmission electron microscope equipped with a field emission gun is applied to study the microstructure of the fractal crystals on TEM grid. Furthermore, with the simulation results of the single-crystal diffraction via the software named CrystalMaker, those crystals are indexed as mesoporous single-crystal-like hexagonal Cu2S composed of numerous nano-crystals in size of 5 nm. Combining the electron microscopy analysis with oriented attachment theory, the growth progress of those fractal crystals is speculated microscopically and macroscopically, and hence the dendritic growth model is proposed.

关 键 词:透射电子显微镜 枝晶 介孔 晶体生长 

分 类 号:O76[理学—晶体学] O78

 

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