Vesicle dynamics in uniform electric fields: squaring and breathing

McConnell, Lane C.; Vlahovska, Petia M.; Miksis, Michael J.

doi:10.1039/c5sm00585j

Cited by 33 publications

(48 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Theoretical models have also been developed for vesicles and membrane-covered drops [42,43], and recently also for particle encapsulated drops [28,44,45]. These works consider an elastic particle layer on the capsule, i.e., a particle layer with shear elasticity.…”

Section: Discussionmentioning

confidence: 99%

Mechanics of Pickering Drops Probed by Electric Field–Induced Stress

et al. 2017

View full text Add to dashboard Cite

Fluid drops coated with particles, so-called Pickering drops, play an important role in emulsion and capsule applications. In this context, knowledge of mechanical properties and stability of Pickering drops are essential. Here we prepare Pickering drops via electric field-driven self-assembly. We use direct current (DC) electric fields to induce mechanical stress on these drops, as a possible alternative to the use of, for example, fluid flow fields. Drop deformation is monitored as a function of the applied electric field strength. The deformation of pure silicone oil drops is enhanced when covered by insulating polyethylene (PE) particles, whereas drops covered by conductive clay particles can also change shape from oblate to prolate. We attribute these results to changes in the electric conductivity of the drop interface after adding particles, and have developed a fluid shell description to estimate the conductivity of Pickering particle layers that are assumed to be non-jammed and fluid-like. Retraction experiments in the absence of electric fields are also performed. Particle-covered drops retract slower than particle-free drops, caused by increased viscous dissipation due to the presence of the Pickering particle layer.

show abstract

Section: Discussionmentioning

confidence: 99%

Mechanics of Pickering Drops Probed by Electric Field–Induced Stress

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The steps involved within a time-stepping procedure for the electric problem for a given vesicle shape can now be summarized as follows: update V m using (9), which also gives q since the righthand side of (9) is just (σ i σ e /(σ i −σ e ))q, then evaluate the membrane electric force f el by computing E i and E e using (6).…”

Section: Problem Formulation 21 Governing Equationsmentioning

confidence: 99%

Electrohydrodynamics of deflated vesicles: budding, rheology and pairwise interactions

Veerapaneni

2019

J. Fluid Mech.

View full text Add to dashboard Cite

The electrohydrodynamics of vesicle suspensions is characterized by studying their pairwise interactions in applied DC electric fields in two dimensions. In the dilute limit, the rheology of the suspension is shown to vary nonlinearly with the electric conductivity ratio of the interior and exterior fluids. The prolate-oblate-prolate transition and other transitionary dynamics observed in experiments and previously confirmed via numerical simulations is further investigated here for smaller reduced areas. When two vesicles are initially un-aligned with the external electric field, three different responses are observed when the key parameters are varied: (i) chain formation-they self-assemble to form a chain that is aligned along the field direction, (ii) circulatory motion-they rotate about each other, (iii) oscillatory motion-they form a chain but oscillate about each other.

show abstract

“…Simulations could reproduce this phenomenon. Additionally, they predicted bistable configurations, where the vesicle oscillates between the prolate and oblate shape …”

Section: Influencing Surfactant Self‐assembly By Physical Triggersmentioning

confidence: 99%

Added‐Value Surfactants

Polarz

Kunkel

Donner

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Surfactants are ubiquitous in cellular membranes, detergents or as emulsification agents. Due to their amphiphilic properties, they cannot only mediate between two domains of very different solvent compatibility like water and organic but also show fascinating self-assembly features resulting in micelles, vesicles, or lyotropic liquid crystals. The current review article highlights some approaches towards the next generation surfactants, for example, those with catalytically active heads. Furthermore, it is shown that amphiphilic properties can be obtained beyond the classical hydrophobic-hydrophilic interplay, for instance with surfactants containing one molecular block with a special shape. Whereas, classical surfactants are static, researchers have become more interested in species that are able to change their properties depending on external triggers. The article discusses examples for surfactants sensitive to chemical (e.g., pH value) or physical triggers (temperature, electric and magnetic fields).

show abstract

Vesicle dynamics in uniform electric fields: squaring and breathing

Cited by 33 publications

References 45 publications

Mechanics of Pickering Drops Probed by Electric Field–Induced Stress

Mechanics of Pickering Drops Probed by Electric Field–Induced Stress

Electrohydrodynamics of deflated vesicles: budding, rheology and pairwise interactions

Added‐Value Surfactants

Contact Info

Product

Resources

About