Abstract
We perform molecular dynamics simulations of 512 waterlike molecules that interact via the TIP5P potential and are confined between two smooth hydrophobic plates that are separated by 1.10 nm. We find that the anomalous thermodynamic properties of water are shifted to lower temperatures relative to the bulk by . The dynamics and structure of the confined water resemble bulk water at higher temperatures, consistent with the shift of thermodynamic anomalies to lower temperature. Because of this shift, our confined water simulations (down to ) do not reach sufficiently low temperature to observe a liquid-liquid phase transition found for bulk water at using the TIP5P potential, but we see inflections in isotherms at lower temperatures presumably due to the presence of a liquid-liquid critical point. We find that the different crystalline structures that can form for two different separations of the plates, 0.7 and 1.10 nm, have no counterparts in the bulk system, and we discuss the relevance to experiments on confined water.
8 More- Received 27 May 2005
DOI:https://doi.org/10.1103/PhysRevE.72.051503
©2005 American Physical Society