Journal
SOFT MATTER
Volume 7, Issue 14, Pages 6413-6417Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1sm05460k
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Funding
- NSF [DMR-1055594]
- PENN MRSEC through the National Science Foundation [DMR-0520020]
- Fundacion Caja Madrid
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We study the behaviour of Janus particles at an oil-water interface. Amphiphilic Janus particles exhibit attractive interactions at the fluid-fluid interface. The attractive interactions are likely due to the pinning of contact line around the diffuse boundary between the two hemispheres. The undulation of the three-phase contact line around Janus particles leads to quadrupolar capillary interactions, which we confirm by measuring the interparticle forces. We also show that Janus particles with two negatively charged-hydrophilic hemispheres show repulsive interactions.
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