Snap-off production of monodisperse droplets

Snap-off production of monodisperse droplets.

We introduce a novel technique to produce monodisperse droplets through the snap-off mechanism. The methodology is simple, versatile, and requires no specialized or expensive components. The droplets produced have polydispersity < 1% and can be as small as 2.5 μm radius. A convenient feature is that the droplet size is constant over a 100-fold change in flow rate, while at higher flows the drop...

Rotational Diffusion of Monodisperse Liquid Crystal Droplets

many isotropic oils, this liquid crystal is not soluble in water. We therefore We have prepared monodisperse suspensions of nematic liquid use an ionic surfactant, sodium dodecyl sulfate (SDS), to stabilize the crystal droplets in water. The droplets are stabilized by polyvinyl droplets. This allows us to use standard fractionated crystallization methods alcohol, a polymer that induces planar a...

A Microfluidic Platform for the Production of Monodisperse Ultralow Interfacial Tension Oil Droplets in Water

We present a novel microfluidic approach for the generation of monodisperse oil droplets in water with ultra-low interfacial tensions. Using an oil-water-surfactant formulation under conditions close to the microemulsion phase transition, we actively controlled the surface tension at the liquid-liquid interface within the microfluidic device in order to produce monodisperse droplets. These drop...

Take off of small Leidenfrost droplets.

We put in evidence the unexpected behavior of Leidenfrost droplets at the later stage of their evaporation. We predict and observe that, below a critical size Rl, the droplets spontaneously take off due to the breakdown of the lubrication regime. We establish the theoretical relation between the droplet radius and its elevation. We predict that the vapor layer thickness increases when the dropl...

Microfluidic production of monodisperse functional o/w droplets and study of their reversible pH dependent aggregation behavior†