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Shao C, Ong WL, Shiomi J, McGaughey AJH. Nanoconfinement between Graphene Walls Suppresses the Near-Wall Diffusion of the Ionic Liquid [BMIM][PF 6]. J Phys Chem B 2021; 125:4527-4535. [PMID: 33885322 DOI: 10.1021/acs.jpcb.1c02562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
We identify two distinct regimes for the diffusion of the ionic liquid [BMIM][PF6] confined between parallel graphene walls using molecular dynamics simulations. Within 2 nm of the wall, the cations and anions form a well-defined layered structure. In this region, the in-plane diffusion coefficients are suppressed when compared to their bulk values and increase monotonically with the distance away from the wall. Beyond 2 nm from the wall, the density profile and in-plane diffusion coefficients recover their bulk values. The channel-averaged in-plane diffusion coefficients increase monotonically with wall separation and recover the bulk values at a separation of 15 nm. A simple semianalytical model is proposed that mirrors this trend. The results also highlight the importance of applying a finite-size correction to molecular dynamics-predicted diffusion coefficients of confined liquids, which may otherwise be unusually larger than their bulk values.
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Affiliation(s)
- Cheng Shao
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.,University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai 200240, China.,Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
| | - Wee-Liat Ong
- ZJU-UIUC Institute, College of Energy Engineering, Zhejiang University, Haining, Zhejiang 314400, People's Republic of China.,State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Junichiro Shiomi
- Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
| | - Alan J H McGaughey
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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Zhang L, Wu K, Chen Z, Li J, Yu X, Yang S, Hui G, Yang M. Quasi-Continuum Water Flow under Nanoconfined Conditions: Coupling the Effective Viscosity and the Slip Length. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Linyang Zhang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Keliu Wu
- State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
| | - Zhangxin Chen
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
- Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum (Beijing), Beijing 102249, China
| | - Jing Li
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
- Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum (Beijing), Beijing 102249, China
| | - Xinran Yu
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Sheng Yang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Gang Hui
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
| | - Min Yang
- Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N1N4, Canada
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Yao S, Wang J, Liu X, Jiao Y. The effects of surface topography and non-uniform wettability on fluid flow and interface slip in rough nanochannel. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112460] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ajala AO, Voora V, Mardirossian N, Furche F, Paesani F. Assessment of Density Functional Theory in Predicting Interaction Energies between Water and Polycyclic Aromatic Hydrocarbons: from Water on Benzene to Water on Graphene. J Chem Theory Comput 2019; 15:2359-2374. [PMID: 30860827 DOI: 10.1021/acs.jctc.9b00110] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The interactions of water with polycyclic aromatic hydrocarbons, from benzene to graphene, are investigated using various exchange-correlation functionals selected across the hierarchy of density functional theory (DFT) approximations. The accuracy of the different functionals is assessed through comparisons with random phase approximation (RPA) and coupled-cluster with single, double, and perturbative triple excitations [CCSD(T)] calculations. Diffusion Monte Carlo (DMC) data reported in the literature are also used for comparison. Relatively large variations are found in interaction energies predicted by different DFT models, with GGA functionals underestimating the interaction strength for configurations with the water oxygen pointing toward the aromatic molecules. The meta-GGA B97M-rV and range-separated hybrid, meta-GGA ωB97M-V functionals provide nearly quantitative agreement with CCSD(T) values for the water-benzene, water-coronene, and water-circumcoronene dimers, while RPA and DMC predict interaction energies that differ by up to ∼1 kcal/mol and ∼0.4 kcal/mol from the corresponding CCSD(T) values, respectively. Similar trends among GGA, meta-GGA, and hybrid functionals are observed for larger polycyclic aromatic hydrocarbons. By performing absolutely localized molecular orbital energy decomposition analyses (ALMO-EDA), it is found that, independently of the number of carbon atoms and exchange-correlation functional, the dominant contributions to the interaction energies between water and polycyclic aromatic hydrocarbon molecules are the electrostatic and dispersion terms while polarization and charge transfer effects are negligibly small. Calculations carried out with GGA and meta-GGA functionals indicate that, as the number of carbon atoms increases, the interaction energies slowly converge to the corresponding values obtained for an infinite graphene sheet.
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Affiliation(s)
- Adeayo O Ajala
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093 , United States
| | - Vamsee Voora
- Department of Chemistry , University of California Irvine , Irvine , California 92697 , United States
| | - Narbe Mardirossian
- Division of Chemistry and Chemical Engineering , California Institute of Technology , 1200 E. California Boulevard , Pasadena , California 91125 , United States
| | - Filipp Furche
- Department of Chemistry , University of California Irvine , Irvine , California 92697 , United States
| | - Francesco Paesani
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093 , United States.,Materials Science and Engineering , University of California San Diego , La Jolla , California 92093 , United States.,San Diego Supercomputer Center , University of California San Diego , La Jolla , California 92093 , United States
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Affiliation(s)
- Kazuma Honma
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Yukio Kimura
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Yu-uta Kan-no
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Shogo Tsushida
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Masahito Sano
- Department of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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Agosta L, Brandt EG, Lyubartsev AP. Diffusion and reaction pathways of water near fully hydrated TiO 2 surfaces from ab initio molecular dynamics. J Chem Phys 2018; 147:024704. [PMID: 28711052 DOI: 10.1063/1.4991381] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Ab initio molecular dynamics simulations are reported for water-embedded TiO2 surfaces to determine the diffusive and reactive behavior at full hydration. A three-domain model is developed for six surfaces [rutile (110), (100), and (001), and anatase (101), (100), and (001)] which describes waters as "hard" (irreversibly bound to the surface), "soft" (with reduced mobility but orientation freedom near the surface), or "bulk." The model explains previous experimental data and provides a detailed picture of water diffusion near TiO2 surfaces. Water reactivity is analyzed with a graph-theoretic approach that reveals a number of reaction pathways on TiO2 which occur at full hydration, in addition to direct water splitting. Hydronium (H3O+) is identified to be a key intermediate state, which facilitates water dissociation by proton hopping between intact and dissociated waters near the surfaces. These discoveries significantly improve the understanding of nanoscale water dynamics and reactivity at TiO2 interfaces under ambient conditions.
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Affiliation(s)
- Lorenzo Agosta
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Erik G Brandt
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Alexander P Lyubartsev
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
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Abstract
Understanding and controlling the flow of water confined in nanopores has tremendous implications in theoretical studies and industrial applications. Here, we propose a simple model for the confined water flow based on the concept of effective slip, which is a linear sum of true slip, depending on a contact angle, and apparent slip, caused by a spatial variation of the confined water viscosity as a function of wettability as well as the nanopore dimension. Results from this model show that the flow capacity of confined water is 10-1∼107 times that calculated by the no-slip Hagen-Poiseuille equation for nanopores with various contact angles and dimensions, in agreement with the majority of 53 different study cases from the literature. This work further sheds light on a controversy over an increase or decrease in flow capacity from molecular dynamics simulations and experiments.
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Wang W, Zhang H, Tian C, Meng X. Numerical experiments on evaporation and explosive boiling of ultra-thin liquid argon film on aluminum nanostructure substrate. Nanoscale Res Lett 2015; 10:158. [PMID: 25918494 PMCID: PMC4401484 DOI: 10.1186/s11671-015-0830-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 02/17/2015] [Indexed: 05/28/2023]
Abstract
Evaporation and explosive boiling of ultra-thin liquid film are of great significant fundamental importance for both science and engineering applications. The evaporation and explosive boiling of ultra-thin liquid film absorbed on an aluminum nanostructure solid wall are investigated by means of molecular dynamics simulations. The simulated system consists of three regions: liquid argon, vapor argon, and an aluminum substrate decorated with nanostructures of different heights. Those simulations begin with an initial configuration for the complex liquid-vapor-solid system, followed by an equilibrating system at 90 K, and conclude with two different jump temperatures, including 150 and 310 K which are far beyond the critical temperature. The space and time dependences of temperature, pressure, density number, and net evaporation rate are monitored to investigate the phase transition process on a flat surface with and without nanostructures. The simulation results reveal that the nanostructures are of great help to raise the heat transfer efficiency and that evaporation rate increases with the nanostructures' height in a certain range.
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Affiliation(s)
- Weidong Wang
- />Department of Electrical and Mechanical Engineering, Xidian University, No. 2 South Taibai Road, Xi’an, Shaanxi 710071 China
- />State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, No. 99 Yanxiang Road, Xi’an, Shaanxi 710054 China
- />Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Haiyan Zhang
- />Department of Electrical and Mechanical Engineering, Xidian University, No. 2 South Taibai Road, Xi’an, Shaanxi 710071 China
| | - Conghui Tian
- />Department of Electrical and Mechanical Engineering, Xidian University, No. 2 South Taibai Road, Xi’an, Shaanxi 710071 China
| | - Xiaojie Meng
- />Department of Electrical and Mechanical Engineering, Xidian University, No. 2 South Taibai Road, Xi’an, Shaanxi 710071 China
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Khan S, Singh JK. Wetting transition of nanodroplets of water on textured surfaces: a molecular dynamics study. Molecular Simulation 2013. [DOI: 10.1080/08927022.2013.819578] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ito T, Arima T, Himi M, Yugo H. Atomistic simulations on the interfacial interaction of metallic fuel and structural materials in SFRs - molecular dynamics model for Pu-Fe system. J NUCL SCI TECHNOL 2013; 50:265-276. [DOI: 10.1080/00223131.2013.772443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Olivares-Rivas W, Colmenares PJ. Scaling of Langevin and molecular dynamics persistence times of nonhomogeneous fluids. Phys Rev E Stat Nonlin Soft Matter Phys 2012; 85:011117. [PMID: 22400522 DOI: 10.1103/physreve.85.011117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/24/2011] [Indexed: 05/31/2023]
Abstract
The existing solution for the Langevin equation of an anisotropic fluid allowed the evaluation of the position-dependent perpendicular and parallel diffusion coefficients, using molecular dynamics data. However, the time scale of the Langevin dynamics and molecular dynamics are different and an ansatz for the persistence probability relaxation time was needed. Here we show how the solution for the average persistence probability obtained from the backward Smoluchowski-Fokker-Planck equation (SE), associated to the Langevin dynamics, scales with the corresponding molecular dynamics quantity. Our SE perpendicular persistence time is evaluated in terms of simple integrals over the equilibrium local density. When properly scaled by the perpendicular diffusion coefficient, it gives a good match with that obtained from molecular dynamics.
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Affiliation(s)
- Wilmer Olivares-Rivas
- Grupo de Química Teórica, Quimicofísica de Fluidos y Fenómenos Interfaciales (QUIFFIS) Departamento de Química-Universidad de Los Andes Mérida 5101, Venezuela.
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Ito T, Hirata Y, Kukita Y. Fluid epitaxialization effect on velocity dependence of dynamic contact angle in molecular scale. J Chem Phys 2010; 132:054702. [DOI: 10.1063/1.3294879] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Colmenares PJ, López F, Olivares-Rivas W. Molecular dynamics and analytical Langevin equation approach for the self-diffusion constant of an anisotropic fluid. Phys Rev E Stat Nonlin Soft Matter Phys 2009; 80:061123. [PMID: 20365134 DOI: 10.1103/physreve.80.061123] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Indexed: 05/29/2023]
Abstract
We carried out a molecular-dynamics (MD) study of the self-diffusion tensor of a Lennard-Jones-type fluid, confined in a slit pore with attractive walls. We developed Bayesian equations, which modify the virtual layer sampling method proposed by Liu, Harder, and Berne (LHB) [P. Liu, E. Harder, and B. J. Berne, J. Phys. Chem. B 108, 6595 (2004)]. Additionally, we obtained an analytical solution for the corresponding nonhomogeneous Langevin equation. The expressions found for the mean-squared displacement in the layers contain naturally a modification due to the mean force in the transverse component in terms of the anisotropic diffusion constants and mean exit time. Instead of running a time consuming dual MD-Langevin simulation dynamics, as proposed by LHB, our expression was used to fit the MD data in the entire survival time interval not only for the parallel but also for the perpendicular direction. The only fitting parameter was the diffusion constant in each layer.
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Affiliation(s)
- Pedro J Colmenares
- Quimicofísica de Fluidos y Fenómenos Interfaciales, Departamento de Química, Universidad de Los Andes, Mérida 5101, Venezuela
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Zhou S. A new scheme for perturbation contribution in density functional theory and application to solvation force and critical fluctuations. J Chem Phys 2009; 131:134702. [DOI: 10.1063/1.3242717] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Wang F, Yue X, Xu S, Zhang L, Zhao R, Hou J. Influence of wettability on flow characteristics of water through microtubes and cores. Chin Sci Bull 2009; 54:2256-62. [DOI: 10.1007/s11434-009-0167-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
Pressure-driven water flow through carbon nanotubes (CNTs) with diameters ranging from 1.66 to 4.99 nm is examined using molecular dynamics simulation. The flow rate enhancement, defined as the ratio of the observed flow rate to that predicted from the no-slip Hagen-Poiseuille relation, is calculated for each CNT. The enhancement decreases with increasing CNT diameter and ranges from 433 to 47. By calculating the variation of water viscosity and slip length as a function of CNT diameter, it is found that the results can be fully explained in the context of continuum fluid mechanics. The enhancements are lower than previously reported experimental results, which range from 560 to 100 000, suggesting a miscalculation of the available flow area and/or the presence of an uncontrolled external driving force (such as an electric field) in the experiments.
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Affiliation(s)
- John A Thomas
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Thomas JA, McGaughey AJH. Density, distribution, and orientation of water molecules inside and outside carbon nanotubes. J Chem Phys 2008; 128:084715. [DOI: 10.1063/1.2837297] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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