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Title: Large Decrease of Fluctuations for Supercooled Water in Hydrophobic Nanoconfinement
Author: Strekalova, Elena G.
Mazza, Marco G.
Stanley, H. Eugene (Harry Eugene), 1941-
Franzese, Giancarlo
Keywords: Física de partícules
Particle physics
Issue Date: 7-Apr-2011
Publisher: American Physical Society
Abstract: Using Monte Carlo simulations, we study 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 , we find a first-order liquid-liquid phase transition (LLPT) ending in one critical point at low pressure P . For c > 0 , our simulations are consistent with a LLPT line ending in two critical points at low and high P . For c = 25 % , at high P and low temperature, we find a dramatic decrease of compressibility, thermal expansion coefficient, and specific heat. Surprisingly, the effect is present also for c as low as 2.4%. We conclude that even a small presence of hydrophobic nanoparticles can drastically suppress thermodynamic fluctuations, making the detection of the LLPT more difficult.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2011, vol. 106, num. 14, p. 145701
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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