NIMTE OpenIR  > 2018专题
Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces
Bian, Baoru; Chen, Guoxin; Zheng, Qiang; Du, Juan; Lu, Huanming; Liu, J. Ping; Hu, Yong; Zhang, Zhidong
2018
发表期刊SMALL
卷号14期号:34
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.
关键词Electron-microscopy Optical-activity Superlattices Nanocrystals Supraparticles Diffusion Nanocubes Clusters Growth
学科领域Physics
语种英语
文献类型期刊论文
条目标识符http://ir.nimte.ac.cn/handle/174433/17250
专题2018专题
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GB/T 7714
Bian, Baoru,Chen, Guoxin,Zheng, Qiang,et al. Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces[J]. SMALL,2018,14(34).
APA Bian, Baoru.,Chen, Guoxin.,Zheng, Qiang.,Du, Juan.,Lu, Huanming.,...&Zhang, Zhidong.(2018).Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces.SMALL,14(34).
MLA Bian, Baoru,et al."Self-Assembly of CoPt Magnetic Nanoparticle Arrays and its Underlying Forces".SMALL 14.34(2018).
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