Large decrease of fluctuations for supercooled water in hydrophobic nanoconfinement
arXiv:1010.0693 · doi:10.1103/PhysRevLett.106.145701
Abstract
We study by Monte Carlo simulations a coarse-grained model of a water layer confined in a fixed disordered matrix of hydrophobic nanoparticles at different particle concentrations c. For c=0 (bulk water) we find a first order liquid-liquid phase transition (LLPT). For c>0 our simulations are consistent with a LLPT line ending in two critical points at low and high pressure P. For c=25% we find a dramatic decrease of compressibility K_T, thermal expansion coefficient α_P, specific heat C_P at high P and low temperature T. Surprisingly, the effect is present also for c as low as 2.4%. We conclude that the higher the confinement, the lower the thermodynamic fluctuations and the more difficult it will be to detect the LLPT.
11 pages with 4 figures
References in corpus (6)
- Observation of the Density Minimum in Deeply Supercooled Confined Water
- Predictions of Dynamic Behavior Under Pressure for Two Scenarios to Explain Water Anomalies
- Heat Capacity Effects Associated with the Hydrophobic Hydration and Interaction of Simple Solutes: A Detailed Structural and Energetical Analysis Based on MD Simulations
- Cluster Monte Carlo and numerical mean field analysis for the water liquid--liquid phase transition
- Structural properties and liquid spinodal of water confined in a hydrophobic environment
- Dynamically Slow Processes in Supercooled Water Confined Between Hydrophobic Plates
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