Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2018专题

	Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces
	Hu, Yong; Bian, Baoru; Chen, Guoxin; Zheng, Qiang; Du, Juan; Lu, Huanming; Liu, J. Ping; Zhang, Zhidong
刊名	SMALL
	2018
卷号	14 期号:34
关键词	Electron-microscopy Optical-activity Superlattices Nanocrystals Supraparticles Diffusion Nanocubes Clusters Growth
英文摘要	Nanoparticles covered with surfactants are often used to study particle motion patterns and self-assembly processes in solutions. Surfactants have influence on the interparticle interactions and therefore on the particle motion tracks and final patterns. In this study, CoPt nanoparticles are synthesized in aqueous solution without any surfactant. In situ transmission electron microscopy observation is performed to monitor the self-assemble process. Two types of magnetic nanoparticle superlattice arrays are formed: hexagonal equal distance superlattice arrays when particle size is 3 nm, and tight unequal distance superlattice arrays when particle size is 4.5 nm. It is interesting to observe that two small arrays merge into a large one through rotational and translational movements. A Monte Carlo simulation is carried out which successfully restores the whole process. It is identified that the underlying forces are van der Waals and magnetic dipolar interactions. The latter is responsible for orientation of each particle during the whole process. This investigation leads to a better understanding of the formation mechanism of magnetic nanoparticle superlattice arrays.
学科主题	Physics
语种	英语
公开日期	2018-12-04
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/17250]
专题	2018专题
推荐引用方式 GB/T 7714	Hu, Yong,Bian, Baoru,Chen, Guoxin,et al. Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces[J]. SMALL,2018,14(34).
APA	Hu, Yong.,Bian, Baoru.,Chen, Guoxin.,Zheng, Qiang.,Du, Juan.,...&Zhang, Zhidong.(2018).Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces.SMALL,14(34).
MLA	Hu, Yong,et al."Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces".SMALL 14.34(2018).