Magneto-optical granulometry: on the determination of the statistics of magnetically induced particle chains in concentrated ferrofluids from linear dichroism experiments

TL;DR

This paper introduces a theoretical model and experimental method to analyze how magnetic fields induce nanoparticle chains in ferrofluids, affecting their optical properties, enabling detailed granulometry of particle chain statistics.

Contribution

The paper develops a new analytical model combined with experimental techniques to quantify nanoparticle chain statistics in ferrofluids under magnetic fields.

Findings

Model accurately predicts chain formation effects on dichroism

Method enables magnetic field-dependent granulometry

Supports analysis of concentrated ferrofluid behavior

Abstract

An analytical theoretical model for the influence of the magnetically induced nanoparticle chaining on the linear dichroism in ferrofluids was developed. The model is based on a statistical theory for magnetic nanoparticle chaining in ferrofluids. Together with appropriate experimental approach and data processing strategy, the model grounds a magneto-optical granulometry method able to determine the magnetic field dependence of the statistics of magnetically induced particle chains in concentrated ferrofluids.