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Advisor(s)
Abstract(s)
With the help of a unique combination of density functional theory and computer simulations, we discover two possible scenarios, depending on concentration, for the hierarchical self-assembly of magnetic nanoparticles on cooling. We show that typically considered low temperature clusters, i.e. defect-free chains and rings, merge into more complex branched structures through only three types of defects: four-way X junctions, three-way Y junctions and two-way Z junctions. Our accurate calculations reveal the predominance of weakly magnetically responsive rings cross-linked by X defects at the lowest temperatures. We thus provide a strategy to fine-tune magnetic and thermodynamic responses of magnetic nanocolloids to be used in medical and microfluidics applications.
Description
Keywords
Dipolar hard-spheres Monte-Carlo Nanoparticles Colloids Ferrofluids Particles Fluid Polymers Phase Field
Citation
KANTOROVICH, Sofia S. [et al.] - Temperature-induced structural transitions in self-assembling magnetic nanocolloids. PCCP - Physical Chemistry Chemical Physics. ISSN. 1463-9076. Vol. 17, N.º 25 (2015), pp. 16601-16608
Publisher
Royal Soc Chemistry