Microfluidic Exploration of the Phase Diagram of a Surfactant/Water Binary System

Details Microfluidic Exploration of the Phase Diagram of a Surfactant/Water Binary System Microfluidic Exploration of the Phase Diagram of a Surfactant/Water Binary System

2006-10-31

arxiv.org/abs/cond-mat/0610876v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

We investigate the behaviour of a binary surfactant solution (AOT/water) as it is progressively concentrated in microfluidic evaporators. We observe in time a succession of phase transitions from a dilute solution up to a dense state, which eventually grows and invades the microchannels. Analyzing these observations, we show that, with a few experiments and a limited amount of material, our microdevices permit a semi-quantitative screening of the equilibrium phase diagram as well as a few kinetic observations.

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