Active colloidal particles at fluid-fluid interfaces

Fei, Wenjie; Gu, Yanzheng; Bishop, Kyle J. M.

doi:10.1016/j.cocis.2017.10.001

Cited by 93 publications

(76 citation statements)

References 132 publications

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“…In conclusion, from the demonstration of the first catalytically active particle onward [54], fluid interfaces have been offering a broad range of promising opportunities to realize new active systems [55], exploiting the unique combination of strong vertical confinement [56,57], specific interactions [58], and highly efficient available propulsion sources. We expect that the near future will see further expansion encompassing both fundamental studies and applications [59].…”

Section: -4mentioning

confidence: 99%

Microscale Marangoni Surfers

et al. 2020

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We apply laser light to induce the asymmetric heating of Janus colloids adsorbed at water-oil interfaces and realize active micrometric "Marangoni surfers." The coupling of temperature and surfactant concentration gradients generates Marangoni stresses leading to self-propulsion. Particle velocities span 4 orders of magnitude, from microns/s to cm/s, depending on laser power and surfactant concentration. Experiments are rationalized by finite elements simulations, defining different propulsion regimes relative to the magnitude of the thermal and solutal Marangoni stress components.

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Section: -4mentioning

confidence: 99%

Microscale Marangoni Surfers

et al. 2020

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“…In these technologies, thin liquid films containing suspensions of colloids are spread onto a solid substrate; as the colloids adsorb onto the surface, the subsequent evaporation of the film draws the colloids together by capillary forces to create assembled structures. Magnetic and electrostatic forces applied to magnetized or charged colloids, respectively, are also used to tune the assembly which can further be tuned by using active colloids which propel themselves 6 .…”

Section: Introductionmentioning

confidence: 99%

The Translational and Rotational Dynamics of a Colloid Moving Along the Air-Liquid Interface of a Thin Film

Das

Koplik

Farinato

et al. 2018

Sci Rep

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This study examines the translation and rotation of a spherical colloid straddling the (upper) air/liquid interface of a thin, planar, liquid film bounded from below by either a solid or a gas/liquid interface. The goal is to obtain numerical solutions for the hydrodynamic flow in order to understand the influence of the film thickness and the lower interface boundary condition. When the colloid translates on a film above a solid, the viscous resistance increases significantly as the film thickness decreases due to the fluid-solid interaction, while on a free lamella, the drag decreases due to the proximity to the free (gas/liquid) surface. When the colloid rotates, the contact line of the interface moves relative to the colloid surface. If no-slip is assumed, the stress becomes infinite and prevents the rotation. Here finite slip is used to resolve the singularity, and for small values of the slip coefficient, the rotational viscous resistance is dominated by the contact line stress and is surprisingly less dependent on the film thickness and the lower interface boundary condition. For a colloid rotating on a semi-infinite liquid layer, the rotational resistance is largest when the colloid just breaches the interface from the liquid side.

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“…Monte Carlo simulations have been performed to identify the various steps of compression of gold nanoparticles coated with mixed ligands at a liquid–liquid interface and capillary deformations . A recent review has explored the cross section between two essential fields of colloid and interface science. It is revealed that the active colloidal particles at fluid interfaces requires energy input at the particle level to drive particle motions and direct dynamic assemblies while the passive particles relies on the spontaneous adsorption to modify the interfacial energy, rheology, and permeability of biphasic materials.…”

Section: Self‐assembly Of Nanoparticles At Liquid–liquid Interfacesmentioning

confidence: 99%

Self‐Assembly of Nanoparticles in 2D and 3D: Recent Advances and Future Trends

Ghosh

Böker

2019

Macro Chemistry & Physics

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For more than a century, it has been known that emulsions consisting of two immiscible liquids can be rendered from coalescence by means of solid particles, coined as Pickering emulsions. Based on this discovery, novel materials as a result of the formation of 2D and 3D assemblies of nanostructures at liquid–liquid interfaces have been synthesized. These materials have received considerable attention due to several unique attributes of the nanoscale materials within these assemblies and their utilization in a wide arena of niche applications. With the progressive advent of the synthetic strategies of the nanostructures, these assemblies can be engendered to create membranes and capsules with high mechanical strength and desirable porosity and even can be made stimuli‐responsive. The nanostructures, ranging from inorganic particles to proteins to polymeric architectures, possess their stabilizing effects due to excess attachment energies and lead to the maneuvering of exciting structural design, such as colloidosomes and yeastosomes. The ability of the different kind of particles at the nanoscale dimension to self‐assemble at the liquid–liquid interface into ordered superstructures has substantial potential toward the design of exotic electronic, catalytic, optical, magnetic, and biomimetic materials.

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Active colloidal particles at fluid-fluid interfaces

Cited by 93 publications

References 132 publications

Microscale Marangoni Surfers

Microscale Marangoni Surfers

The Translational and Rotational Dynamics of a Colloid Moving Along the Air-Liquid Interface of a Thin Film

Self‐Assembly of Nanoparticles in 2D and 3D: Recent Advances and Future Trends

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