过饱和度
纳米结构
材料科学
再结晶(地质)
纳米技术
微晶
无定形固体
晶体生长
化学工程
结晶学
化学
冶金
有机化学
生物
工程类
古生物学
作者
Xianli Liu,Jinwei Xu,Zhicheng Fang,Lin Lin,Yu Qian,Youcheng Wang,Chunmiao Ye,Chao Ma,Jie Zeng
出处
期刊:Nano Research
[Springer Nature]
日期:2015-09-26
卷期号:8 (11): 3612-3620
被引量:21
标识
DOI:10.1007/s12274-015-0861-4
摘要
Shape control has proven to be a powerful and versatile means of tailoring the properties of Bi2Se3 nanostructures for a wide variety of applications. Here, three different Bi2Se3 nanostructures, i.e., spiral-type nanoplates, smooth nanoplates, and dendritic nanostructures, were prepared by manipulating the supersaturation level in the synthetic system. This mechanism study indicated that, at low supersaturation, defects in the crystal growth could cause a step edge upon which Bi2Se3 particles were added continuously, leading to the formation of spiral-type nanoplates. At intermediate supersaturation, the aggregation of amorphous Bi2Se3 particles and subsequent recrystallization resulted in the formation of smooth nanoplates. Furthermore, at high supersaturation, polycrystalline Bi2Se3 cores formed initially, on which anisotropic growth of Bi2Se3 occurred. This work not only advances our understanding of the growth mechanism but also offers a new approach to control the morphology of Bi2Se3 nanostructures.
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