Rigid sphere transport through a colloidal gas–liquid interface

Folter, Julius W. J. de; Villeneuve, V.W.A. de; Aarts, Dirk G. A. L.; Lekkerkerker, H. N. W.

doi:10.1088/1367-2630/12/2/023013

Cited by 18 publications

(12 citation statements)

References 42 publications

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“…Finally, when a particle approaches a fluid interface in such a way that the capillary number (the ratio between viscous and surfacetension forces) is no longer small, the particle may penetrate the interface while being engulfed by the phase it originated from, i.e. without a three-phase contact line being formed [25,26]. Therefore, for an analysis of the forces required to let a particle penetrate the liquid/liquid interface, it is important to discriminate whether the glass spheres are suspended above the interface or actually get adsorbed.…”

Section: Suspended Vs Adsorbed Particlesmentioning

confidence: 99%

Detachment of particles and particle clusters from liquid/liquid interfaces

Sinn

Alishahi

Hardt

2015

Journal of Colloid and Interface Science

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Section: Suspended Vs Adsorbed Particlesmentioning

confidence: 99%

Detachment of particles and particle clusters from liquid/liquid interfaces

Sinn

Alishahi

Hardt

2015

Journal of Colloid and Interface Science

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“…This assessment is in agreement with the previous literature, which also uses a fluid mixture that has an ultralow interfacial tension. 40 In our experiments, the interfacial tensions are $1000 À 10 000 times smaller than in typical oil-water systems.…”

Section: Physical Discussion Of Conformal Coatingmentioning

confidence: 50%

“…If the sphere surface is wettable to the entrained phase, then the coating layer stays on the sphere surface. 40 Analogously, in our microfluidic system, the force on the particle due to magnetism replaces the gravitational force (Fig. 5).…”

Section: Physical Discussion Of Conformal Coatingmentioning

confidence: 84%

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Microfluidic conformal coating of non-spherical magnetic particles

et al. 2014

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We present the conformal coating of non-spherical magnetic particles in a colaminar flow microfluidic system. Whereas in the previous reports spherical particles had been coated with thin films that formed spheres around the particles; in this article, we show the coating of non-spherical particles with coating layers that are approximately uniform in thickness. The novelty of our work is that while liquid-liquid interfacial tension tends to minimize the surface area of interfacesfor example, to form spherical droplets that encapsulate spherical particles-in our experiments, the thin film that coats non-spherical particles has a non-minimal interfacial area. We first make bullet-shaped magnetic microparticles using a stopflow lithography method that was previously demonstrated. We then suspend the bullet-shaped microparticles in an aqueous solution and flow the particle suspension with a co-flow of a non-aqueous mixture. A magnetic field gradient from a permanent magnet pulls the microparticles in the transverse direction to the fluid flow, until the particles reach the interface between the immiscible fluids. We observe that upon crossing the oil-water interface, the microparticles become coated by a thin film of the aqueous fluid. When we increase the two-fluid interfacial tension by reducing surfactant concentration, we observe that the particles become trapped at the interface, and we use this observation to extract an approximate magnetic susceptibility of the manufactured non-spherical microparticles. Finally, using fluorescence imaging, we confirm the uniformity of the thin film coating along the entire curved surface of the bullet-shaped particles. To the best of our knowledge, this is the first demonstration of conformal coating of non-spherical particles using microfluidics. V C 2014 AIP Publishing LLC. [http://dx

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“…The high falling velocity near the interface is interpreted by a model for the transport process that applies then the interfacial tension force is larger than the gravitational force. 49 According to the model, sphere falling velocity is reduced as the sphere approaches an interface which deforms. Then, the capillary waves of the interface connect to the wetting layer surrounding the sphere.…”

Section: B Falling Sphere Viscosity Measurement For Ultralow Viscousmentioning

confidence: 99%

X-ray imaging for studying behavior of liquids at high pressures and high temperatures using Paris-Edinburgh press

Kono

Kenney‐Benson

Shibazaki

et al. 2015

Review of Scientific Instruments

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Several X-ray techniques for studying structure, elastic properties, viscosity, and immiscibility of liquids at high pressures have been integrated using a Paris-Edinburgh press at the 16-BM-B beamline of the Advanced Photon Source. Here, we report the development of X-ray imaging techniques suitable for studying behavior of liquids at high pressures and high temperatures. White X-ray radiography allows for imaging phase separation and immiscibility of melts at high pressures, identified not only by density contrast but also by phase contrast imaging in particular for low density contrast liquids such as silicate and carbonate melts. In addition, ultrafast X-ray imaging, at frame rates up to ∼10(5) frames/second (fps) in air and up to ∼10(4) fps in Paris-Edinburgh press, enables us to investigate dynamics of liquids at high pressures. Very low viscosities of melts similar to that of water can be reliably measured. These high-pressure X-ray imaging techniques provide useful tools for understanding behavior of liquids or melts at high pressures and high temperatures.

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Rigid sphere transport through a colloidal gas–liquid interface

Cited by 18 publications

References 42 publications

Detachment of particles and particle clusters from liquid/liquid interfaces

Detachment of particles and particle clusters from liquid/liquid interfaces

Microfluidic conformal coating of non-spherical magnetic particles

X-ray imaging for studying behavior of liquids at high pressures and high temperatures using Paris-Edinburgh press

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