Liu, X;
Kent, N;
Ceballos, A;
Streubel, R;
Jiang, Y;
Chai, Y;
Kim, PY;
... Russell, TP; + view all
(2019)
Reconfigurable ferromagnetic liquid droplets.
Science
, 365
(6450)
pp. 264-267.
10.1126/science.aaw8719.
Preview |
Text
Xubo_preprint.pdf - Accepted Version Download (5MB) | Preview |
Abstract
Solid ferromagnetic materials are rigid in shape and cannot be reconfigured. Ferrofluids, although reconfigurable, are paramagnetic at room temperature and lose their magnetization when the applied magnetic field is removed. Here, we show a reversible paramagnetic-to-ferromagnetic transformation of ferrofluid droplets by the jamming of a monolayer of magnetic nanoparticles assembled at the water-oil interface. These ferromagnetic liquid droplets exhibit a finite coercivity and remanent magnetization. They can be easily reconfigured into different shapes while preserving the magnetic properties of solid ferromagnets with classic north-south dipole interactions. Their translational and rotational motions can be actuated remotely and precisely by an external magnetic field, inspiring studies on active matter, energy-dissipative assemblies, and programmable liquid constructs.
| Type: | Article |
|---|---|
| Title: | Reconfigurable ferromagnetic liquid droplets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/science.aaw8719 |
| Publisher version: | https://doi.org/10.1126/science.aaw8719 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Multidisciplinary Sciences, Science & Technology - Other Topics |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10087710 |
Archive Staff Only
 |
View Item |
