Abstract
Capillary interactions can be used to direct assembly of particles
adsorbed at fluid-fluid interfaces. Precisely controlling the magnitude
and direction of capillary interactions to assemble particles into
favoured structures for materials science purposes is desirable but
challenging. In this paper, we investigate capillary interactions
between magnetic Janus particles adsorbed at fluid-fluid interfaces. We
develop a pair-interaction model that predicts that these particles
should arrange into a side--side configuration, and carry out
simulations that confirm the predictions of our model. Finally, we
investigate the monolayer structures that form when many magnetic Janus
particles adsorb at the interface. We find that the particles arrange
into long, straight chains exhibiting little curvature, in contrast with
capillary interactions between ellipsoidal particles. We further find a
regime in which highly ordered, lattice-like monolayer structures form,
which can be tuned dynamically using an external magnetic field.
Original language | English |
---|---|
Pages (from-to) | 6566-6574 |
Journal | Soft Matter |
Volume | 12 |
Issue number | 31 |
DOIs | |
Publication status | Published - 21 Aug 2016 |
Keywords
- Condensed Matter - Soft Condensed Matter