Valentino Bianco, Giancarlo Franzese
We study by Monte Carlo simulations the low temperature phase diagram of a water monolayer confined between hydrophobic walls separated by h = 0.5 nm. By finite size scaling of the appropriate order parameter, we find a liquid-liquid critical point (LLCP) in the universality class of the two-dimensional (2D) Ising model in the limit of infinite walls. However, for wall sizes up to hun- dreds of times larger than the monolayer thickness h, the LLCP is better described by the 3D Ising model universality class, something unexpected based on studies for simple liquids. We ascribe this result to the strong cooperativity and the low coordination number of the hydrogen bond network.
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http://arxiv.org/abs/1212.2847
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