Contractile Actuation and Dynamical Gel Assembly of Paramagnetic Filaments in Fast Precessing Fields
May 12, 2017
Scientific Achievement
We find that individual flexible superparamagnetic filaments can be made to exert controllable tensile forces along the precession axis.
Significance and Impact
Our work demonstrates the power of magnetic filaments as the basis for dynamic designer materials, including dynamic gelation and actuation.
Precession frequency ω and bending modulus κ effects on aggregation for 80-bead filaments with M = 3μ2/σ3 =12KT and viscous drag in Lennard-Jones units γσ=10. The inverse magnetoelastic parameter ξ = κ/ (ML2 ) versus the magnetic normalized end force χ = M/ (γωσ), shows at low ω and κ filaments aggregating into spirals instead of branching networks.
Research Details
- We combine analytical tools and simulations to study the behavior of isolated and bulk filaments in dynamic magnetic fields.
- We focus on exploiting dynamic effects common to many types of filaments in order to produce desired behaviors.
Contractile Actuation and Dynamical Gel Assembly of Paramagnetic Filaments in Fast Precessing Fields
Dempster, J.M., Vazquez-Montejo, P., Olvera de la Cruz, M.
Phys. Rev. E 95, 2017, 052606.
Work performed at Northwestern University