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. 2017 Aug 11;29(37):373003. doi: 10.1088/1361-648X/aa7933

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© 2017 IOP Publishing Ltd

Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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Figure 32. — Ellipsoidal magnetic microparticles at interfaces. The neutrally-wetting particles (contact angle $θ_{c} = 0^{\circ}$ ) are initially distributed randomly in their equilibrium orientations with surface fraction $ϕ = 0.38$ . (a) Applying a magnetic field parallel to the interface normal, $H$ , causes them to self-assemble due to dipolar capillary interactions. (b) Once the critical dipole field strength B_c is reached, the particles transition to the vertical state, halting dipolar capillary interactions. The particles randomly redistribute if magnetic dipole-dipole and van der Waals interactions are weak compared with thermal fluctuations. Reprinted with permission from [110]. OA CC BY 3.0.

Figure 32. — Ellipsoidal magnetic microparticles at interfaces. The neutrally-wetting particles (contact angle $θ_{c} = 0^{\circ}$ ) are initially distributed randomly in their equilibrium orientations with surface fraction $ϕ = 0.38$ . (a) Applying a magnetic field parallel to the interface normal, $H$ , causes them to self-assemble due to dipolar capillary interactions. (b) Once the critical dipole field strength B_c is reached, the particles transition to the vertical state, halting dipolar capillary interactions. The particles randomly redistribute if magnetic dipole-dipole and van der Waals interactions are weak compared with thermal fluctuations. Reprinted with permission from [110]. OA CC BY 3.0.