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Accueil du site > Publications > Archives 2004-2010 > 2007 > Microfluidic Exploration of the Phase Diagram of a Surfactant/Water Binary System

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

J. Leng, M. Joanicot, and A. Ajdari — Langmuir 23 (2007) 2315-2317

31 janvier 2007

We investigate the behaviour of a binary surfactant solution (AOT/water) as it is progressively concen- trated in microfluidic evaporators. We observe in time a succession of phase transitions from a di- lute solution up to a dense state, which eventually grows and invades the microchannels. Analyzing these observations, we show that, with a few ex- periments 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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