How cube-like must magnetic nanoparticles be to modify their self-assembly?

摘要: Systems whose magnetic response can be finely tuned using control parameters, such as temperature and external field strength, are extremely desirable, functional materials. Magnetic nanoparticles, in particular suspensions thereof, offer opportunities for this controllability to realised. Cube-like particles particularly mono-disperse examples that, together with their favourable packing behaviour, make them of significant interest study. Using a combination analytical calculations molecular dynamics we have studied the self-assembly permanently magnetised dipolar superballs. The superball shape parameter was varied order interpolate region between already well-studied sphere system that recently investigated cube. Our findings show particle becomes more cubic chain ring transition, observed ground state spherical particles, occurs at an increasingly larger cluster size. This effect is mitigated, however, by appearance competing configuration; asymmetric rings, conformation superballs readily adopt.