Acoustic levitation of water droplets in an environmentally controlled chamber

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This project involves building an acoustic levitator suitable for levitatingmicrolitre or smaller water droplets in an environmentally controlled chamber.The benefit of having the levitator is to prevent any interactions the dropletswould have with any substrate they were sitting on. The droplets will becooled at a controlled rate, with measurements being made on the freezingtemperatures of water droplets with different types of ice nucleating particles,as well as different salt concentrations. Tasks involve building a suitableenvironmentally controlled chamber which can cool the droplets withoutinducing air currents and therefore oscillations, as well as developing amethod to introduce droplets and detect when they have frozen. As thedroplets get smaller evaporation will also have to be taken into account, andthe humidity will have to be controlled to ensure the droplets last longenough to freeze.