| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2024
|
| Presentation Title |
High-Remance Magnetic Nanostructures for Microactuators |
| Author(s) |
Amal El-Ghazaly, Yulan Chen, Ludovico Cestarollo |
| On-Site Speaker (Planned) |
Amal El-Ghazaly |
| Abstract Scope |
The mechanical behavior of soft magnetic actuators strongly depends on the magnetization of the nanostructures inside. We have investigated the macroscale deformation characteristics, including deflection and mechanical hysteresis, of magnetic soft actuators made with magenetic nanoparticles in an elastomer matrix. We have also related them to the magnetic remanence of the embedded nanostructures and their distribution within the elastomer. Anisotropic 1-dimensional nanostructures, i.e. nanochains, formed from the nanoparticles are hypothesized to produce the maximimum actuation response with maximum deflection and minimum mechanical hysteresis.
Using our self-assembly technique, we synthesized high-remanent Fe-Co nanochain structures for the magnetic actuators. By synthesizing Fe-Co in high-concentration solutions, no external field is required to develop single paticle-wide nanochains with aspect ratios >10:1 and twice the remancence of their nanoparticle building blocks. A soft actuator was made using an optimal volume concentration of nanochains (6 vol.%) and shown to provide large actuation at fields <100 mT. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Nanotechnology, Polymers |