Aggregation and Growth of Large-Sized Formations, Composed by Nanoparticles of Aqueous Ferrofluid in Magnetic Field

Abstract

In this work, we studied the sizes of magnetic nanoparticles suspended in a ferrofluid using laser correlation spectroscopy. In addition, the dynamics of the process of aggregation and growth of large-scale formations in a ferromagnetic fluid was studied under the influence of an external magnetic field on the solution. It has been established that the average size of the smallest magnetic particles in the sample under study is about 30 nanometers without the action of the field. When an external field appears, an increase in the average size of scatterers is observed due to aggregation. In the study, the dependence of the nature of cluster growth on the magnitude of the applied field was established.