Reconfigurable ferromagnetic liquid droplets.

Journal

Science (New York, N.Y.)
ISSN: 1095-9203
Titre abrégé: Science
Pays: United States
ID NLM: 0404511

Informations de publication

Date de publication:
19 07 2019
Historique:
received: 31 01 2019
accepted: 24 05 2019
entrez: 20 7 2019
pubmed: 20 7 2019
medline: 20 7 2019
Statut: ppublish

Résumé

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.

Identifiants

DOI: 10.1126/science.aaw8719 PMID: 31320536
pubmed: 31320536
pii: 365/6450/264
doi: 10.1126/science.aaw8719
doi:

Types de publication

Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Langues

eng

Sous-ensembles de citation

IM

Pagination

264-267

Commentaires et corrections

Type : CommentIn

Informations de copyright

Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.

Auteurs

Xubo Liu (X)

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0002-2231-0208

Noah Kent (N)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Physics Department, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
ORCID: 0000-0003-2712-6239

Alejandro Ceballos (A)

Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
ORCID: 0000-0002-9661-8643

Robert Streubel (R)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0003-4783-892X

Yufeng Jiang (Y)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Department of Applied Science and Technology, University of California, Berkeley, Berkeley, CA 94720, USA.
ORCID: 0000-0002-1705-5863

Yu Chai (Y)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0001-6085-4321

Paul Y Kim (PY)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0002-7271-0568

Joe Forth (J)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0001-7263-6364

Frances Hellman (F)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Physics Department, University of California, Berkeley, Berkeley, CA 94720, USA.
ORCID: 0000-0002-9135-6330

Shaowei Shi (S)

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
ORCID: 0000-0002-9869-4340

Dong Wang (D)

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
ORCID: 0000-0003-2326-0852

Brett A Helms (BA)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0003-3925-4174

Paul D Ashby (PD)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
ORCID: 0000-0003-4195-310X

Peter Fischer (P)

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Physics Department, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
ORCID: 0000-0002-9824-9343

Thomas P Russell (TP)

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. tom.p.russell@gmail.com.
Polymer Science and Engineering Department, University of Massachusetts, Amherst, MA 01003, USA.
WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan.
ORCID: 0000-0001-6384-5826

Classifications MeSH