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Kanda H, Wahyudiono, Goto M. Thermodynamic model of extraction equilibrium in cylindrical nanopores validated with molecular dynamics simulation. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Berim GO, Ruckenstein E. Structure of a nanodrop of a binary mixture on a solid surface. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1976857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Gersh O. Berim
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, NY, USA
| | - Eli Ruckenstein
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, NY, USA
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Molecular Dynamics Simulation of Tolman Length and Interfacial Tension of Symmetric Binary Lennard–Jones Liquid. Symmetry (Basel) 2021. [DOI: 10.3390/sym13081376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The Tolman length and interfacial tension of partially miscible symmetric binary Lennard–Jones (LJ) fluids (A, B) was revealed by performing a large-scale molecular dynamics (MD) simulation with a sufficient interfacial area and cutting distance. A unique phenomenon was observed in symmetric binary LJ fluids, where two surfaces of tension existed on both sides of an equimolar dividing surface. The range of interaction εAB between the different liquids and the temperature in which the two LJ fluids partially mixed was clarified, and the Tolman length exceeded 3 σ when εAB was strong at higher temperatures. The results show that as the temperature or εAB increases, the Tolman length increases and the interfacial tension decreases. This very long Tolman length indicates that one should be very careful when applying the concept of the liquid–liquid interface in the usual continuum approximation to nanoscale droplets and capillary phase separation in nanopores.
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Desgranges C, Delhommelle J. Free energy calculations along entropic pathways. III. Nucleation of capillary bridges and bubbles. J Chem Phys 2017. [DOI: 10.1063/1.4982943] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Caroline Desgranges
- Department of Chemistry, University of North Dakota, Grand Forks, North Dakota 58202, USA
| | - Jerome Delhommelle
- Department of Chemistry, University of North Dakota, Grand Forks, North Dakota 58202, USA
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Mhanna R, Abdel Hamid AR, Dutta S, Lefort R, Noirez L, Frick B, Morineau D. More room for microphase separation: An extended study on binary liquids confined in SBA-15 cylindrical pores. J Chem Phys 2017; 146:024501. [DOI: 10.1063/1.4972126] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Suh D, Yasuoka K, Zeng XC. Molecular dynamics simulation of heterogeneous nucleation on nanotubes. RSC Adv 2015. [DOI: 10.1039/c5ra04398k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Condensation rate inside and outside the tube depends on the pore diameter and length.
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Affiliation(s)
- Donguk Suh
- Department of Mechanical Engineering
- Keio University
- Yokohama, Japan
| | - Kenji Yasuoka
- Department of Mechanical Engineering
- Keio University
- Yokohama, Japan
| | - Xiao Cheng Zeng
- Department of Chemistry
- University of Nebraska-Lincoln
- Lincoln, USA
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Berim GO, Ruckenstein E. Symmetry breaking in binary mixtures in closed nanoslits. J Chem Phys 2008; 128:134713. [PMID: 18397100 DOI: 10.1063/1.2904880] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The symmetry breaking (SB) of the fluid density distribution (FDD) in closed nanoslits between two identical parallel solid walls described by Berim and Ruckenstein [J. Chem. Phys. 128, 024704 (2008)] for a single component fluid is examined for binary mixtures on the basis of a nonlocal canonical ensemble density functional theory. As in Monte Carlo simulations, the periodicity of the FDD in one of the lateral (parallel to the wall surfaces) directions, denoted as the x direction, was assumed. In the other lateral direction, y direction, the FDD was considered to be uniform. The molecules of the two components have different diameters and their Lennard-Jones interaction potentials have different energy parameters. It was found that depending on the average fluid density in the slit and mixture composition, SB can occur for both or none of the components but never for only one of them. In the direction perpendicular to the walls (h direction), the FDDs of both components can be asymmetrical about the middle plane between walls. In the x direction, the SB occurs as bumps and bridges enriched in one of the components, whereas the composition of the mixture between them is enriched in the other component. The dependence of the SB states on the length Lx of the FDD period at fixed average densities of the two components was examined for Lx in the range from 10 to 120 molecular diameters of the smaller size component. It was shown that for large Lx, the stable state of the system corresponds to a bridge. Because the free energy of that state decreases monotonically with increasing Lx, one can conclude that the real period is very large (infinite) and that a single bridge exists in the slit.
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Affiliation(s)
- Gersh O Berim
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260, USA
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Mota JPB, Esteves IAAC. Simplified gauge-cell method and its application to the study of capillary phase transition of propane in carbon nanotubes. ADSORPTION 2007. [DOI: 10.1007/s10450-007-9006-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sun Y, Steinhart M, Zschech D, Adhikari R, Michler GH, Gösele U. Diameter-Dependence of the Morphology of PS-b-PMMA Nanorods Confined Within Ordered Porous Alumina Templates. Macromol Rapid Commun 2005. [DOI: 10.1002/marc.200400545] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Brovchenko I, Geiger A, Oleinikova A. Water in nanopores. I. Coexistence curves from Gibbs ensemble Monte Carlo simulations. J Chem Phys 2004; 120:1958-72. [PMID: 15268330 DOI: 10.1063/1.1631919] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Coexistence curves of water in cylindrical and slitlike nanopores of different size and water-substrate interaction strength were simulated in the Gibbs ensemble. The two-phase coexistence regions cover a wide range of pore filling level and temperature, including ambient temperature. Five different kinds of two-phase coexistence are observed. A single liquid-vapor coexistence is observed in hydrophobic and moderately hydrophilic pores. Surface transitions split from the main liquid-vapor coexistence region, when the water-substrate interaction becomes comparable or stronger than the water-water pair interaction. In this case prewetting, one and two layering transitions were observed. The critical temperature of the first layering transition decreases with strengthening water-substrate interaction towards the critical temperature expected for two-dimensional systems and is not sensitive to the variation of pore size and shape. Liquid-vapor phase transition in a pore with a wall which is already covered with two water layers is most typical for hydrophilic pores. The critical temperature of this transition is very sensitive to the pore size, in contrast to the liquid-vapor critical temperature in hydrophobic pores. The observed rich phase behavior of water in pores evidences that the knowledge of coexistence curves is of crucial importance for the analysis of experimental results and a prerequiste of meaningful simulations.
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Affiliation(s)
- I Brovchenko
- Physikalische Chemie, Universitat Dortmund, D-44221 Dortmund, Germany
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Vishnyakov A, Neimark AV. Nucleation of liquid bridges and bubbles in nanoscale capillaries. J Chem Phys 2003. [DOI: 10.1063/1.1615760] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hoffmann J, Nielaba P. Phase transitions and quantum effects in pore condensates: a path integral Monte Carlo study. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2003; 67:036115. [PMID: 12689140 DOI: 10.1103/physreve.67.036115] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2002] [Indexed: 05/24/2023]
Abstract
Lennard-Jones condensates in cylindrical pores are studied by path integral Monte Carlo simulations with particular emphasis on phase transitions and quantum effects. The pore diameter effect and the influence of the interaction strength between the cylinder wall and the adsorbate particles on the structures and the location of the phase boundaries is studied and the quantum effect on the phase diagram is quantified by path integral Monte Carlo simulations. In case of strong wall-particle interactions good qualitative agreement with recent experimental results for the freezing of Ar-pore condensates is found. Meniscus structures in the solid phase are obtained as well as unexpected condensate structures for the system with the lighter Ne-particles due to quantum delocalization effects. The quantum effect on the freezing temperature can be as large as 10% in these systems.
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Affiliation(s)
- J Hoffmann
- Department of Physics, University of Konstanz, Germany
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Neimark AV, Ravikovitch PI, Vishnyakov A. Inside the hysteresis loop: multiplicity of internal states in confined fluids. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2002; 65:031505. [PMID: 11909064 DOI: 10.1103/physreve.65.031505] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2001] [Indexed: 05/23/2023]
Abstract
We study the equilibrium and stability of metastable states and capillary condensation hysteresis of a Lennard-Jones fluid in cylindrical pores by means of the canonical ensemble density functional theory and gauge cell Monte Carlo simulations. We demonstrate a possibility for the existence of multiple laterally uniform internal states of equal density inside the hysteresis loop. The region of multiple states is bounded by the states of zero compressibility. The internal states can be stabilized in Monte Carlo simulations constraining the density fluctuations.
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Duda Y, Sokolowski S, Bryk P, Pizio O. Structure and Adsorption of a Hard Sphere Fluid in a Cylindrical and Spherical Pore Filled by a Disordered Matrix: A Monte Carlo Study. J Phys Chem B 1998. [DOI: 10.1021/jp9811272] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Duda
- Instituto de Quimica de la UNAM, Coyoacán 04510, México D.F., Mexico, and Department of Modelling of Physico-Chemical Processes, Marie Curie-Sklodowska University, Lublin 200-31, Poland
| | - S. Sokolowski
- Instituto de Quimica de la UNAM, Coyoacán 04510, México D.F., Mexico, and Department of Modelling of Physico-Chemical Processes, Marie Curie-Sklodowska University, Lublin 200-31, Poland
| | - P. Bryk
- Instituto de Quimica de la UNAM, Coyoacán 04510, México D.F., Mexico, and Department of Modelling of Physico-Chemical Processes, Marie Curie-Sklodowska University, Lublin 200-31, Poland
| | - O. Pizio
- Instituto de Quimica de la UNAM, Coyoacán 04510, México D.F., Mexico, and Department of Modelling of Physico-Chemical Processes, Marie Curie-Sklodowska University, Lublin 200-31, Poland
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Zhu YM. Monte Carlo simulation of polymerization-induced phase separation. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 54:1645-1651. [PMID: 9965240 DOI: 10.1103/physreve.54.1645] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Sung L, Karim A, Douglas JF, Han CC. Dimensional crossover in the phase separation kinetics of thin polymer blend films. PHYSICAL REVIEW LETTERS 1996; 76:4368-4371. [PMID: 10061272 DOI: 10.1103/physrevlett.76.4368] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Bhattacharya A, Rao M, Chakrabarti A. Kinetics of phase ordering of nematic liquid crystals in a confined geometry. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 53:4899-4903. [PMID: 9964818 DOI: 10.1103/physreve.53.4899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Zhang Z, Chakrabarti A, Mouritsen OG, Zuckermann MJ. Substrate-induced bulk alignment of liquid crystals. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 53:2461-2465. [PMID: 9964531 DOI: 10.1103/physreve.53.2461] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Zhang Z, Chakrabarti A. Nematic ordering in a Vycor-like restrictive geometry: A two-dimensional model. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:4991-4999. [PMID: 9963994 DOI: 10.1103/physreve.52.4991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Zhang Z, Chakrabarti A. Phase separation of binary fluids in porous media: Asymmetries in pore geometry and fluid composition. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1995; 52:2736-2741. [PMID: 9963720 DOI: 10.1103/physreve.52.2736] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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