化学物理
超顺磁性
纳米技术
粒子(生态学)
分子动力学
星团(航天器)
磁化
作者
Frederik Laust Durhuus,Lau Halkier Wandall,Mathias Hoeg Boisen,Mathias Kure,Marco Beleggia,Cathrine Frandsen
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2021-01-28
卷期号:13 (3): 1970-1981
被引量:2
摘要
Magnetically guided self-assembly of nanoparticles is a promising bottom-up method to fabricate novel materials and superstructures, such as, for example, magnetic nanoparticle clusters for biomedical applications. The existence of assembled structures has been verified by numerous experiments, yet a comprehensive theoretical framework to explore design possibilities and predict emerging properties is missing. Here we present a model of magnetic nanoparticle interactions built upon a Langevin dynamics algorithm to simulate the time evolution and aggregation of colloidal suspensions. We recognise three main aggregation regimes: non-aggregated, linear and clustered. Through systematic simulations we have revealed the link between single particle parameters and which aggregates are formed, both in terms of the three regimes and the chance of finding specific aggregates, which we characterise by nanoparticle arrangement and net magnetic moment. Our findings are shown to agree with past experiments and may serve as a stepping stone to guide the design and interpretation of future studies.
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