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

doi:10.1002/smll.201801184

CORC > 金属研究所 > 中国科学院金属研究所

	Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces
	Bian, BR ; Chen, GX ; Zheng, Q ; Du, J ; Lu, HM ; Liu, JP ; Hu, Y 2; Zhang, ZD
刊名	SMALL
	2018-08-23
卷号	14 期号:34 页码:-
关键词	CoPt nanoparticle superlattice driving force in situ TEM self-assembly
ISSN号	1613-6810
DOI	10.1002/smll.201801184
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	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
语种	英语
WOS记录号	WOS:000442501500004
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/80008]
专题	金属研究所_中国科学院金属研究所
作者单位	1.Chinese Acad Sci, Key Lab Magnet Mat & Devices, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China 2.Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA 3.Northeastern Univ, Coll Sci, Shenyang 110819, Liaoning, Peoples R China 4.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110011, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Bian, BR,Chen, GX,Zheng, Q,et al. Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces[J]. SMALL,2018,14(34):-.
APA	Bian, BR.,Chen, GX.,Zheng, Q.,Du, J.,Lu, HM.,...&Zhang, ZD.(2018).Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces.SMALL,14(34),-.
MLA	Bian, BR,et al."Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces".SMALL 14.34(2018):-.