# Synthesis of Iron(II,III) Oxide–Titanium Core–Shell Particles via Magnetron Sputtering for Magnetoactive Elastomers

## TL;DR

This paper introduces a new method to create stable, biocompatible magnetic particles for use in soft materials like those used in robotics and biomedical devices.

## Contribution

A novel surface-engineering strategy using magnetron sputtering to synthesize Fe3O4@Ti core–shell particles for improved magnetoactive elastomers.

## Key findings

- Fe3O4@Ti core–shell particles enhance chemical stability and surface compatibility.
- The titanium shell enables better dispersion in PDMS matrices for magnetoactive applications.
- This approach addresses limitations of conventional ferromagnetic fillers like corrosion and biocompatibility.

## Abstract

Magnetoactive elastomers
(MAEs) and magnetorheological
elastomers
(MREs) are widely explored for vibration damping, soft robotics, and
biomimetic applications. Conventional ferromagnetic fillers such as
iron (Fe) and its ferrimagnetic oxides (Fe3O4, Fe2O3) provide effective magnetic actuation
but suffer from low corrosion resistance and limited biocompatibility.
While poly­(dimethylsiloxane) (PDMS) offers excellent biocompatibility,
its integration with bare Fe/Fe3O4 particles
remains challenging. In this work, we present a surface-engineering
strategy to overcome these limitations by synthesizing Fe3O4@Ti core–shell particles via magnetron sputtering.
The titanium shell improves chemical stability and surface compatibility,
enabling better dispersion and performance within the PDMS matrix
for magnetoactive applications.