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Nanoparticle Surfactants for Structured Liquid Processing

The formation of NP-surfactant stabilized liquid droplets from a stream of one liquid in a second immiscible liquid by PR-instabilities.

Scientific Achievement
Developed a revolutionary materials platform for the continuous production of discrete, responsive, and reconfigurable all-liquid systems.

Significance and Impact
The interfacial assembly of nanoparticle surfactants (NPS) suppressed Plateau-Rayleigh instabilities, and a continuous process yielded highly uniform droplets with controlled volume that can change shape on application of an external field.

Research Details

  • NPSs produced at immiscible liquid interfaces from functional NPs in one liquid and polymers with complementary end-functionality in a second immiscible fluid.
  • NPSs suppressed Plateau-Rayleigh (PR) instabilities of free-falling jet of an aqueous phase into an oil resulting in longer jets.
  • Simple route to continuously form spheres and ultimately tubules of one liquid phase in another.

A. Toor, B. Helms, and T. P. Russell, Nano Letters, (2017), DOI: 10.1021/acs.nanolett.7b00556