A microfluidic device for investigating crystal nucleation kinetics
Philippe Laval, Jean-Baptiste Salmon, Mathieu Joanicot
Abstract
We have developed an original setup using microfluidic tools allowing one to produce continuously monodisperse microreactors (≈ 100 nL), and to control their temperatures as they flow in the microdevice. With a specific microchannels geometry, we are able to apply large temperature quenches to droplets containing a KNO3 solution (up to 50C in 10 s), and then to follow nucleation kinetics at high supersaturations. By measuring the probability of crystal presence in the droplets as a function of time, we estimate the nucleation rate for different supersaturations, and confront our results to the classical nucleation theory.
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