A comprehensive review of the fundamental rheology of dilute disperse systems is presented. The exact rheological constitutive equations based on rigorous single-particle mechanics are discussed for a variety of disperse systems. The different types of inclusions (disperse phase) considered are: rigid-solid spherical particles with and without electric charge, rigid-porous spherical particles, ...

Two-componen t lattice gases o f the general type introduced by Widom and Rowlinsonr and their con t inuum analog have been o f considerable interest in the study of phase transitions and cooperat ive phenomena. ~2-7) For the simplest case o f two symmetric components A and B with repulsive hard cores between unlike particles and a smaller (point) hard core between like particles, a demixing ph...

Magnetite (Fe3O4) nanoparticles were synthesized by coprecipitation route. Coprecipitation is a simple, reproducible and accessible technique relying on the coprecipitation of Fe2+ and Fe3+ cations by NaOH as base at low temperature (~80 °C). In this work, the role of different solvents (H2O, ethylene glycol, diethylene glycol, triethylene glycol) on phase, structure, microstructure and magneti...

Iron, cobalt and nickel nanoparticles, grown in the gas phase, are known to arrange in chains and bracelet-like rings due to the long-range dipolar interaction between the ferromagnetic (or super-paramagnetic) particles. We investigate the dynamics and thermodynamics of such magnetic dipolar nanoparticles for low densities using molecular dynamics simulations and analyze the influence of temper...

We use sensitive dynamic cantilever magnetometry to measure the magnetic hysteresis of individual Janus particles. These particles consist hemispherical caps material deposited on micrometer-scale silica spheres. The measurements, combined with corresponding micromagnetic simulations, reveal configurations present in these curved magnets. In remanence, ferromagnetic are found host a global vort...

Abstract Various types of magnetic nanoparticles have been developed for a range medical applications and some the potential to treat diseases. In this paper, new method controlling position these particles by changing field surrounding them using three Halbach ringsis investigated with aid simulation. The inner ring controls direction, two outer rings can keep group together. simulation, is ca...

The doped perovskite cobaltite La1−xSrxCoO3 LSCO has been advanced as a model system for studying intrinsic magnetic phase separation. We have employed a first-order reversal curve FORC method to probe the amount of irreversible switching in bulk polycrystalline LSCO as a function of Sr doping, field cooling procedure, and temperature. The value of the FORC distribution is used as a measure of ...

Microscopic swimming devices hold promise for radically new applications in lab-on-a-chip and microfluidic technology, diagnostics and drug delivery etc. In this paper, we demonstrate the experimental verification of a new class of autonomous ferromagnetic swimming devices, actuated and controlled solely by an oscillating magnetic field. These devices are based on a pair of interacting ferromag...