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Dragulet F, Goyal A, Ioannidou K, Pellenq RJM, Del Gado E. Ion Specificity of Confined Ion-Water Structuring and Nanoscale Surface Forces in Clays. J Phys Chem B 2022; 126:4977-4989. [PMID: 35731697 DOI: 10.1021/acs.jpcb.2c01738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ion specificity and related Hofmeister effects, which are ubiquitous in aqueous systems, can have spectacular consequences in hydrated clays, where ion-specific nanoscale surface forces can determine large-scale cohesive swelling and shrinkage behaviors of soil and sediments. We have used a semiatomistic computational approach and examined sodium, calcium, and aluminum counterions confined with water between charged surfaces representative of clay materials to show that ion-water structuring in nanoscale confinement is at the origin of surface forces between clay particles which are intrinsically ion-specific. When charged surfaces strongly confine ions and water, the amplitude and oscillations of the net pressure naturally emerge from the interplay of electrostatics and steric effects, which cannot be captured by existing theories. Increasing confinement and surface charge densities promote ion-water structures that increasingly deviate from the ions' bulk hydration shells, being strongly anisotropic, persistent, and self-organizing into optimized, nearly solid-like assemblies where hardly any free water is left. Under these conditions, strongly attractive interactions can prevail between charged surfaces because of the dramatically reduced dielectric screening of water and the highly organized water-ion structures. By unravelling the ion-specific nature of these nanoscale interactions, we provide evidence that ion-specific solvation structures determined by confinement are at the origin of ion specificity in clays and potentially a broader range of confined aqueous systems.
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Affiliation(s)
- Francis Dragulet
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Abhay Goyal
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States.,Infrastructure Materials Group, Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Katerina Ioannidou
- Laboratoire de Mécanique et Génie Civil, CNRS Université de Montpellier, Montpellier 34090, France
| | - Roland J-M Pellenq
- EPiDaPo, The Joint CNRS and George Washington University Laboratory, Children's National Medical Center, Children's Research Institute, 111 Michigan Avenue NW, Washington, D.C. 20010, United States
| | - Emanuela Del Gado
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
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Goyal A, Palaia I, Ioannidou K, Ulm FJ, van Damme H, Pellenq RJM, Trizac E, Del Gado E. The physics of cement cohesion. SCIENCE ADVANCES 2021; 7:7/32/eabg5882. [PMID: 34348896 PMCID: PMC8336951 DOI: 10.1126/sciadv.abg5882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Cement is the most produced material in the world. A major player in greenhouse gas emissions, it is the main binding agent in concrete, providing a cohesive strength that rapidly increases during setting. Understanding how such cohesion emerges is a major obstacle to advances in cement science and technology. Here, we combine computational statistical mechanics and theory to demonstrate how cement cohesion arises from the organization of interlocked ions and water, progressively confined in nanoslits between charged surfaces of calcium-silicate-hydrates. Because of the water/ions interlocking, dielectric screening is drastically reduced and ionic correlations are proven notably stronger than previously thought, dictating the evolution of nanoscale interactions during cement hydration. By developing a quantitative analytical prediction of cement cohesion based on Coulombic forces, we reconcile a fundamental understanding of cement hydration with the fully atomistic description of the solid cement paste and open new paths for scientific design of construction materials.
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Affiliation(s)
- Abhay Goyal
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC 20057, USA.
| | - Ivan Palaia
- Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France
- Department of Physics and Astronomy, University College London, London WC1E 6BT, UK
| | - Katerina Ioannidou
- Laboratoire de Mécanique et Génie Civil, CNRS, Université de Montpellier, 34090 Montpellier, France
- Massachusetts Institute of Technology/CNRS/Aix-Marseille University Joint Laboratory, Cambridge, MA 02139, USA
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Franz-Josef Ulm
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Henri van Damme
- École Supérieure de Physique et Chimie Industrielle de la Ville de Paris, 10 rue Vauquelin, 75005 Paris, France
| | - Roland J-M Pellenq
- Massachusetts Institute of Technology/CNRS/Aix-Marseille University Joint Laboratory, Cambridge, MA 02139, USA
- Department of Physics, Georgetown University, Washington, DC 20057, USA
| | | | - Emanuela Del Gado
- Department of Physics, Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC 20057, USA.
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Majumdar J, Moid M, Dasgupta C, Maiti PK. Dielectric Profile and Electromelting of a Monolayer of Water Confined in Graphene Slit Pore. J Phys Chem B 2021; 125:6670-6680. [PMID: 34107687 DOI: 10.1021/acs.jpcb.1c02266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A monolayer of water confined between two parallel graphene sheets exists in many different phases and exhibits fascinating dielectric properties that have been studied in experiments. In this work, we use molecular dynamics simulations to study how the dielectric properties of a confined monolayer of water is affected by its structure. We consider six of the popular nonpolarizable water models-SPC/E, SPC/Fw, TIP3P, TIP3P_M (modified), TIP4P-2005, and TIP4P-2005f-and find that the in-plane structure of the water molecules at ambient temperature and pressure is strongly dependent on the water model: all the 3-point water models considered here show square ice formation, whereas no such structural ordering is observed for the 4-point water models. This allows us to investigate the role of the in-plane structure of the water monolayer on its dielectric profile. Our simulations show an anomalous perpendicular dielectric constant compared to the bulk, and the models that do not exhibit ice formation show very different dielectric response along the channel width compared to models that exhibit square ice formation. We also demonstrate the occurrence of electromelting of the in-plane ordered water under the application of a perpendicular electric field and find that the critical field for electromelting strongly depends on the water model. Together, we have shown the dependence of confined water properties on the different water structures that it may take when sandwiched between bilayer graphene. These remarkable properties of confined water can be exploited in various nanofluidic devices, artificial ion channels, and molecular sieving.
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Affiliation(s)
- Jeet Majumdar
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Mohd Moid
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Chandan Dasgupta
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India.,International Centre for Theoretical Sciences, Bangalore 560089, India
| | - Prabal K Maiti
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
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Tendong E, Dasgupta TS, Chakrabarti J. Dynamics of water trapped in transition metal oxide-graphene nano-confinement. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:325101. [PMID: 32191936 DOI: 10.1088/1361-648x/ab814f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 03/19/2020] [Indexed: 06/10/2023]
Abstract
Motivated by practical implementation of transition-metal oxide-graphene heterostructures, we use all atom molecular dynamics simulations to study dynamics of water in a nano slit bounded by a transition metal oxide surface, namely, TiO2termination of SrTiO3, and graphene. The resultant asymmetric, strong confinement produces square ice-like crystallites of water pinned at TiO2surface and drives enhanced hydrophobicity of graphene via the proximity effect to the hydrophilic TiO2surface. This importantly brings in dynamic heterogeneity, both in translational and rotational degrees of freedom, due to coupling between the slow relaxing, strongly adsorbed water layer at the hydrophilic oxide surface, and faster relaxation of subsequent water layers. The heterogeneity is signalled in the ruggedness of the effective free energy landscapes. We discuss possible implications of our findings in drug delivery.
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Affiliation(s)
- E Tendong
- Department of Condensed Matter Physics and Material Sciences & Department of Chemical Biological and Macromoleculer Sciences, S N Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata - 700106, India
| | - T Saha Dasgupta
- Department of Condensed Matter Physics and Material Sciences & Department of Chemical Biological and Macromoleculer Sciences, S N Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata - 700106, India
| | - J Chakrabarti
- Department of Condensed Matter Physics and Material Sciences,Thematic Unit of Excellence for Material Science & Technology Research Centre, S N Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata - 700106, India
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Hofer TS, Tirler AO. Combining 2d-Periodic Quantum Chemistry with Molecular Force Fields: A Novel QM/MM Procedure for the Treatment of Solid-State Surfaces and Interfaces. J Chem Theory Comput 2015; 11:5873-87. [DOI: 10.1021/acs.jctc.5b00548] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas S. Hofer
- Theoretical Chemistry Division,
Institute for General Inorganic and Theoretical Chemistry, Center
for Chemistry and Biomedicine, University of Innsbruck, Innrain
80-82, A-6020 Innsbruck, Austria
| | - Andreas O. Tirler
- Theoretical Chemistry Division,
Institute for General Inorganic and Theoretical Chemistry, Center
for Chemistry and Biomedicine, University of Innsbruck, Innrain
80-82, A-6020 Innsbruck, Austria
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Narayanan B, Deshmukh SA, Sankaranarayanan SK, Ramanathan S. Strong correlations between structural order and passive state at water–copper oxide interfaces. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.03.221] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Verstraelen T, Vandenbrande S, Ayers PW. Direct computation of parameters for accurate polarizable force fields. J Chem Phys 2015; 141:194114. [PMID: 25416881 DOI: 10.1063/1.4901513] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
We present an improved electronic linear response model to incorporate polarization and charge-transfer effects in polarizable force fields. This model is a generalization of the Atom-Condensed Kohn-Sham Density Functional Theory (DFT), approximated to second order (ACKS2): it can now be defined with any underlying variational theory (next to KS-DFT) and it can include atomic multipoles and off-center basis functions. Parameters in this model are computed efficiently as expectation values of an electronic wavefunction, obviating the need for their calibration, regularization, and manual tuning. In the limit of a complete density and potential basis set in the ACKS2 model, the linear response properties of the underlying theory for a given molecular geometry are reproduced exactly. A numerical validation with a test set of 110 molecules shows that very accurate models can already be obtained with fluctuating charges and dipoles. These features greatly facilitate the development of polarizable force fields.
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Affiliation(s)
- Toon Verstraelen
- Center for Molecular Modeling (CMM), Member of the QCMM Ghent-Brussels Alliance, Ghent University, Technologiepark 903, B9000 Ghent, Belgium
| | - Steven Vandenbrande
- Center for Molecular Modeling (CMM), Member of the QCMM Ghent-Brussels Alliance, Ghent University, Technologiepark 903, B9000 Ghent, Belgium
| | - Paul W Ayers
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
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