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Metastable Vapor in a Janus Nanoconfinement

Journal Article · · Journal of Physical Chemistry. C
We study the competition between liquid and vapor states of water confined between diametrically different surfaces, one hydrophilic and the other strongly hydrophobic (Janus interface). Using atomistic simulations and a generalization of the capillarity approximation, we demonstrate that vapor bubbles can persist in the confinement in long-lived metastable states. In contrast to the well-known metastability of confined liquid with respect to capillary evaporation, a strongly metastable vapor phase has so far not been anticipated, as infiltration does not involve the formation of new liquid–vapor interfaces. In the case of a Janus interface, however, we show that the interfacial free energy passes through a pronounced maximum during infiltration. This counterintuitive phenomenon provides a new mechanism for water-mediated attraction (capillary force) between polar and nonpolar surfaces in biophysical systems and in dispersions of heterogeneous nanoparticles.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Virginia Commonwealth Univ., Richmond, VA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231; SC0004406
OSTI ID:
1480468
Alternate ID(s):
OSTI ID: 1525960
Journal Information:
Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 24 Vol. 121; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (39)

Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Quantifying Density Fluctuations in Volumes of All Shapes and Sizes Using Indirect Umbrella Sampling journal August 2011
Interaction between particles in a nonwetting liquid journal December 1983
Direct measurements of the force between hydrophobic surfaces in water journal July 2001
Superhydrophobic materials for biomedical applications journal October 2016
Heterogeneous surfaces to repel proteins journal February 2016
Universal Repulsive Contribution to the Solvent-Induced Interaction Between Sizable, Curved Hydrophobes journal August 2016
Water-Mediated Interactions between Hydrophilic and Hydrophobic Surfaces journal August 2016
The missing term in effective pair potentials journal November 1987
On the Water−Carbon Interaction for Use in Molecular Dynamics Simulations of Graphite and Carbon Nanotubes journal February 2003
Activation Barrier Scaling for the Spontaneous Evaporation of Confined Water journal December 2004
Free Energy Barriers to Evaporation of Water in Hydrophobic Confinement journal October 2012
Hydrophobic Interactions and Dewetting between Plates with Hydrophobic and Hydrophilic Domains journal March 2009
Hydrophobic Drying and Hysteresis at Different Length Scales by Molecular Dynamics Simulations journal January 2012
Shape Effect on Nanoparticle Solvation: A Comparison of Morphometric Thermodynamics and Microscopic Theories journal April 2012
The search for the hydrophobic force law journal January 2010
The influence of molecular-scale roughness on the surface spreading of an aqueous nanodrop journal January 2010
Simulating water with rigid non-polarizable models: a general perspective journal January 2011
Contact angles journal January 1948
Dynamics of capillary evaporation. II. Free energy barriers journal October 2000
Interaction between hydrophobic surfaces with metastable intervening liquid journal August 2001
Monte Carlo simulation of hydrophobic interaction journal March 1987
Solvent cavitation under solvophobic confinement journal August 2013
Layering transitions and solvation forces in an asymmetrically confined fluid journal April 2014
Wetting transparency of graphene in water journal November 2014
Solvent fluctuations around solvophobic, solvophilic, and patchy nanostructures and the accompanying solvent mediated interactions journal March 2017
From hydration repulsion to dry adhesion between asymmetric hydrophilic and hydrophobic surfaces journal September 2015
Fluids adsorbed in narrow pores: phase equilibria and structure journal November 1990
Recent advances in superhydrophobic surfaces and their relevance to biology and medicine journal February 2016
Pathway to surface-induced phase transition of a confined fluid journal December 1997
Wetting and drying at a curved substrate: Long-ranged forces journal January 2005
Effect of pressure on the phase behavior and structure of water confined between nanoscale hydrophobic and hydrophilic plates journal April 2006
Dynamics and energetics of hydrophobically confined water journal May 2012
Length-scale crossover of the hydrophobic interaction in a coarse-grained water model journal November 2013
Influence of wetting on phase equilibria: A novel mechanism for critical-point shifts in films journal January 1990
Dynamics of Capillary Drying in Water journal February 2003
Colloquium : Scaled particle theory and the length scales of hydrophobicity journal January 2006
Hydrophobicity at a Janus Interface journal January 2002
Water in Nonpolar Confinement: From Nanotubes to Proteins and Beyond journal May 2008

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Communication: Relationship between local structure and the stability of water in hydrophobic confinement journal December 2017

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