TY  - JOUR
AU  - Xie, Qingguang
AU  - Harting, Jens
TI  - Controllable Capillary Assembly of Magnetic Ellipsoidal Janus Particles into Tunable Rings, Chains and Hexagonal Lattices
JO  - Advanced materials
VL  - 33
IS  - 8
SN  - 1521-4095
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-00405
SP  - 2006390 -
PY  - 2021
AB  - Colloidal assembly at fluid interfaces has a great potential for the bottom‐up fabrication of novel structured materials. However, challenges remain in realizing controllable and tunable assembly of particles into diverse structures. Herein, the capillary assembly of magnetic ellipsoidal Janus particles at a fluid–fluid interface is reported. Depending on their tilt angle, that is, the angle the particle main axis forms with the fluid interface, these particles deform the interface and generate capillary dipoles or hexapoles. Driven by capillary interactions, multiple particles thus assemble into chain‐, hexagonal‐lattice‐, and ring‐like structures, which can be actively controlled by applying an external magnetic field. A field‐strength phase diagram is predicted in which various structures are present as stable states. Owing to the diversity, controllability, and tunability of assembled structures, magnetic ellipsoidal Janus particles at fluid interfaces could therefore serve as versatile building blocks for novel materials.
LB  - PUB:(DE-HGF)16
C6  - pmid:33448100
UR  - <Go to ISI:>//WOS:000607520100001
DO  - DOI:10.1002/adma.202006390
UR  - https://juser.fz-juelich.de/record/889792
ER  -