Electroferrofluids with nonequilibrium voltage-controlled magnetism, diffuse interfaces, and patterns

Abstract

Electrically driven dissipative gradients of superparamagnetic nanoparticles allow voltage-controlled magnetism and patterns.

Propulsion of zwitterionic surfactant-stabilized water-in-oil droplets by low electric fields

“…Studies involving the electrohydrodynamic behaviour of zwitterionic surfactants have been scarce, and the exact mechanism(s) related have remained unresolved due to complicated measurement set-ups needed and potentially simultaneous overlapping mechanisms. 31,32,40 Based on the V 2 correlation, our results suggest an interfacial phenomenon which can be further proved by the lack of surfactant concentration effect: As opposed to cases where reverse micelles and their concentration are directly correlated with the motility of particles, 8,44,45 in our case the propulsion velocity does not depend on the surfactant concentration. According to our results, the propulsion velocity does not change upon a 10-fold increase in the SB3-12 concentration (Fig.…”

Magnetic Quincke rollers with tunable single-particle dynamics and collective states

“…Static uniform magnetic fields were created using a pair of electromagnet coils and a power supply as described earlier ( 47 ). Briefly, the two coils (GMW Associates 11801523 and 11801524) were positioned vertically with a gap of 50 mm between them using standard optomechanical components (Thorlabs).…”

Dioctyl sodium sulfosuccinate surfactant self-assembly dependency of solvent hydrophilicity: a modelling study

“…ref. 99–102. Additionally, the selected concentration exceeds critical micellization concentration (CMC) throughout the examined solvent polarity range.…”