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Mulvey D, Jordan KD. Demonstrating the Connection between the Nonvalence Correlation-Bound Anions of Polyaromatic Hydrocarbons and the Image Potential States of Graphene Using a One-Electron Model Hamiltonian. J Phys Chem Lett 2024; 15:6299-6305. [PMID: 38856081 PMCID: PMC11194819 DOI: 10.1021/acs.jpclett.4c01308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 05/29/2024] [Accepted: 06/04/2024] [Indexed: 06/11/2024]
Abstract
The ground and excited state nonvalence correlation-bound (NVCB) anion states of the C 6 n 2 H 6 n hexagonal polycylic aromatic hydrocarbons and of hexagonal C 6 n 2 graphene nanoflakes are characterized using a one-electron model Hamiltonian which incorporates atomic electrostatic moments up to the quadrupole, coupled inducible charges and dipoles, and atom-centered Gaussians to describe the short-range repulsive interactions. Extrapolation of the calculated electron binding energies of the lowest energy symmetric and antisymmetric (with respect to the molecular plane) NVCB anions of both the polycylic aromatic hydrocarbons and the carbon nanoflakes to the n → ∞ limit yields binding energies that are in good agreement with those of the most stable symmetric and antisymmetric image potential states of freestanding graphene as determined from two-photon photoemission spectroscopy (2PPE) experiments.
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Affiliation(s)
- Devin
M. Mulvey
- Department of Chemistry, University
of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kenneth D. Jordan
- Department of Chemistry, University
of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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2
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Mulvey D, Jordan KD. Application of a Fluctuating Charge Polarization Model to Large Polyaromatic Hydrocarbons and Graphene Nanoflakes. J Phys Chem Lett 2023; 14:7869-7875. [PMID: 37639228 PMCID: PMC10494230 DOI: 10.1021/acs.jpclett.3c02013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 08/21/2023] [Indexed: 08/29/2023]
Abstract
We present a polarization model incorporating coupled fluctuating charges and point inducible dipoles that is able to accurately describe the dipole polarizabilities of small hydrocarbons and, for sufficiently large graphene nanoflakes, reproduce the classical image potential of an infinite conducting sheet. When our fluctuating charge model is applied to the hexagonal carbon nanoflake C60000 we attain excellent agreement with the image potential and induced charge distribution of a conducting sheet. With the inclusion of inducible dipole terms, the model predicts an image plane of zim = 1.3334 a0, which falls in line with prior estimates for graphene. We consider the case of two charges placed on opposite sides of C60000 and find that the fluctuating charge model reproduces classical electrostatics once again. By testing opposing and similar signs of the external charges, we conclude that an atomically thin molecule or extended system does not fully screen their interaction.
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Affiliation(s)
- Devin
M. Mulvey
- Department of Chemistry, University
of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Kenneth D. Jordan
- Department of Chemistry, University
of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
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3
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Góger S, Sandonas LM, Müller C, Tkatchenko A. Data-driven tailoring of molecular dipole polarizability and frontier orbital energies in chemical compound space. Phys Chem Chem Phys 2023; 25:22211-22222. [PMID: 37566426 PMCID: PMC10445328 DOI: 10.1039/d3cp02256k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/27/2023] [Indexed: 08/12/2023]
Abstract
Understanding correlations - or lack thereof - between molecular properties is crucial for enabling fast and accurate molecular design strategies. In this contribution, we explore the relation between two key quantities describing the electronic structure and chemical properties of molecular systems: the energy gap between the frontier orbitals and the dipole polarizability. Based on the recently introduced QM7-X dataset, augmented with accurate molecular polarizability calculations as well as analysis of functional group compositions, we show that polarizability and HOMO-LUMO gap are uncorrelated when considering sufficiently extended subsets of the chemical compound space. The relation between these two properties is further analyzed on specific examples of molecules with similar composition as well as homooligomers. Remarkably, the freedom brought by the lack of correlation between molecular polarizability and HOMO-LUMO gap enables the design of novel materials, as we demonstrate on the example of organic photodetector candidates.
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Affiliation(s)
- Szabolcs Góger
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg.
| | - Leonardo Medrano Sandonas
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg.
| | - Carolin Müller
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg.
| | - Alexandre Tkatchenko
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg.
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4
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YANG Y, HIRSINGER L, Devel M. Computation of Flexoelectric Coefficients of a MoS 2 monolayer with a Model of Self-consistently Distributed Effective Charges and Dipoles. J Chem Phys 2022; 156:174104. [DOI: 10.1063/5.0088972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Flexoelectricity is an electromechanical coupling phenomenon, that can generate noticeable electric polarization in dielectric materials for nanoscale strain gradients. It is gaining an increasing attention because of its potential applications, and the fact that experimental results were initially an order of magnitude higher than initial theoretical predictions. This stimulated intense experimental and theoretical researches to investigate flexoelectric coefficients in dielectric materials such as two-dimensional materials. In this work, we concentrate on the calculation of the flexoelectric coefficients of 2D-MoS2 thanks to a model using self-consistently determined charges and dipoles on the atoms. More specifically, we study the importance of two contributions which were neglected/omitted in previous papers using this model, namely the charge term in the total polarization and the conservation of electric charge through a Lagrange multiplier. Our calculations demonstrate that the results for flexoelectric coefficient computed with this improved definition of polarization agree better with experimental measurements, provided consistent definitions for signs are used. Additionally, we show how two physical contributions with opposite signs compete to give net values of flexoelectric coefficients that can be either positive of negative depending on their relative importance, and give net values for the case of MoS2.
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Affiliation(s)
| | | | - Michel Devel
- Doubs, Ecole Nationale Supérieure de Mécanique et des Microtechniques, France
- FEMTO-ST
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5
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Kundalwal SI, Choyal VK, Luhadiya N, Choyal V. Effect of carbon doping on electromechanical response of boron nitride nanosheets. NANOTECHNOLOGY 2020; 31:405710. [PMID: 32706767 DOI: 10.1088/1361-6528/ab9d43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The electromechanical response of hexagonal-boron nitride nanosheets (h-BNSs) was studied via molecular dynamics simulations (MDS) with a three-body Tersoff potential force field using a charge-dipole (C-D) potential model. Carbon (C)-doped h-BNSs with triangular, trapezoidal and circular pores were considered. The elastic and piezoelectric coefficients of h-BNSs under tension and shear loading conditions were determined. The induced polarization in h-BNSs was found to depend on the local arrangement of C atoms around B and N atoms, and the polarization increases if C atoms are surrounded by N atoms. This is attributed to the generation of higher dipole moments due to C-N bonds compared with C-B bonds. At ∼5.5% C-doping concentration, the axial piezoelectric coefficient of doped h-BNSs with triangular and trapezoidal pores increased by 18.5% and 3.5%, respectively, while it reduced by 22.5% in the case of circular pores compared to pristine h-BNS. The shear piezoelectric coefficient of C-doped h-BNSs with triangular and trapezoidal pores increased by 20.5% and 1%, respectively, while it reduced by 7% in case of circular pores. Young's moduli of C-doped h-BNSs with triangular, trapezoidal and circular pores increased by 9%, 7.5% and 5.5%, respectively, due to the C-C bonds being stronger than all other bonds. The respective improvements in shear moduli are 8.5%, 5% and 5%. The elastic and piezoelectric properties of armchair h-BNSs were found to be higher than zigzag h-BNSs. The results also reveal that the piezoelectric coefficient increases as doping increases; it reaches its maximum value around 0.41 C m-2 at 12.6% C-doping concentration and then starts decreasing. The present work shows that we can engineer the electromechanical response of h-BNSs via novel pathways such as different types and size of pores as well as C-doping concentration to suit a particular nanoelectromechanical systems (NEMS) application.
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Affiliation(s)
- S I Kundalwal
- Applied and Theoretical Mechanics (ATOM) Laboratory, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Simrol, Indore 453 552 India
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7
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Poier PP, Lagardère L, Piquemal JP, Jensen F. Molecular Dynamics Using Nonvariational Polarizable Force Fields: Theory, Periodic Boundary Conditions Implementation, and Application to the Bond Capacity Model. J Chem Theory Comput 2019; 15:6213-6224. [DOI: 10.1021/acs.jctc.9b00721] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Pier Paolo Poier
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus, Denmark
| | - Louis Lagardère
- Sorbonne Université, Institut Parisien de Chimie Physique et Théorique, 75005, Paris, France
- Sorbonne Université, Institut des Sciences du Calcul et des Données, 75005, Paris, France
| | - Jean-Philip Piquemal
- Sorbonne Université, Laboratoire de Chimie Théorique, 75005, Paris, France
- Sorbonne Université, Institut Universitaire de France, 75005, Paris, France
- University of Texas, Department of Biomedical Engineering, Austin, Texas, United States
| | - Frank Jensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus, Denmark
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8
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Manz TA, Chen T, Cole DJ, Limas NG, Fiszbein B. New scaling relations to compute atom-in-material polarizabilities and dispersion coefficients: part 1. Theory and accuracy. RSC Adv 2019; 9:19297-19324. [PMID: 35519408 PMCID: PMC9064874 DOI: 10.1039/c9ra03003d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 06/03/2019] [Indexed: 11/21/2022] Open
Abstract
A new method was developed to compute atom-in-material polarizabilities and dispersion coefficients for diverse material types.
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Affiliation(s)
- Thomas A. Manz
- Department of Chemical & Materials Engineering
- New Mexico State University
- Las Cruces
- USA
| | - Taoyi Chen
- Department of Chemical & Materials Engineering
- New Mexico State University
- Las Cruces
- USA
| | - Daniel J. Cole
- School of Natural and Environmental Sciences
- Newcastle University
- Newcastle upon Tyne NE1 7RU
- UK
| | - Nidia Gabaldon Limas
- Department of Chemical & Materials Engineering
- New Mexico State University
- Las Cruces
- USA
| | - Benjamin Fiszbein
- Department of Chemical & Materials Engineering
- New Mexico State University
- Las Cruces
- USA
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9
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Choi TH, Jordan KD. Model potential study of non-valence correlation-bound anions of (C60)n clusters: the role of electric field-induced charge transfer. Faraday Discuss 2019; 217:547-560. [DOI: 10.1039/c8fd00199e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Orbitals associated with the non-valence correlation-bound anions of the C60 dimer and linear trimer from calculations allowing charge transfer.
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Affiliation(s)
- Tae Hoon Choi
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
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10
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Yang Y, Devel M, Wang Z. An atomistic model for the charge distribution in layered MoS 2. J Chem Phys 2018; 149:124102. [PMID: 30278678 DOI: 10.1063/1.5045505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
We present an atomistic model for predicting the distribution of doping electric charges in layered molybdenum disulfide (MoS2). This model mimics the charge around each ion as a net Gaussian-spatially distributed charge plus an induced dipole, and is able to predict the distribution of doping charges in layered MoS2 in a self-consistent scheme. The profiles of doping charges in monolayer MoS2 flakes computed by this charge-dipole model are in good agreement with those obtained by density-functional-theory calculations. Using this model, we quantitatively predict the charge enhancement in MoS2 monolayer nanoribbons, with which strong ionic charge-localization effects are shown.
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Affiliation(s)
- Yida Yang
- Guangxi Key Laboratory for Relativistic Astrophysics, Department of Physics, Guangxi University, Nanning 530004, People's Republic of China
| | - Michel Devel
- FEMTO-ST Institute, UBFC, CNRS, ENSMM, 15B Avenue des Montboucons, 25030 Besançon CEDEX, France
| | - Zhao Wang
- Guangxi Key Laboratory for Relativistic Astrophysics, Department of Physics, Guangxi University, Nanning 530004, People's Republic of China
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11
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Pham VD, Joucken F, Repain V, Chacon C, Bellec A, Girard Y, Rousset S, Sporken R, dos Santos MC, Lagoute J. Molecular adsorbates as probes of the local properties of doped graphene. Sci Rep 2016; 6:24796. [PMID: 27097555 PMCID: PMC4838864 DOI: 10.1038/srep24796] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/05/2016] [Indexed: 11/09/2022] Open
Abstract
Graphene-based sensors are among the most promising of graphene's applications. The ability to signal the presence of molecular species adsorbed on this atomically thin substrate has been explored from electric measurements to light scattering. Here we show that the adsorbed molecules can be used to sense graphene properties. The interaction of porphyrin molecules with nitrogen-doped graphene has been investigated using scanning tunneling microscopy and ab initio calculations. Molecular manipulation was used to reveal the surface below the adsorbed molecules allowing to achieve an atomic-scale measure of the interaction of molecules with doped graphene. The adsorbate's frontier electronic states are downshifted in energy as the molecule approaches the doping site, with largest effect when the molecule sits over the nitrogen dopant. Theoretical calculations showed that, due to graphene's high polarizability, the adsorption of porphyrin induces a charge rearrangement on the substrate similar to the image charges on a metal. This charge polarization is enhanced around nitrogen site, leading to an increased interaction of molecules with their image charges on graphene. Consequently, the molecular states are stabilized and shift to lower energies. These findings reveal the local variation of polarizability induced by nitrogen dopant opening new routes towards the electronic tuning of graphene.
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Affiliation(s)
- Van Dong Pham
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Frédéric Joucken
- Research Center in Physics of Matter and Radiation (PMR), Université de Namur, 61 Rue de Bruxelles, 5000 Namur, Belgium
| | - Vincent Repain
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Cyril Chacon
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Amandine Bellec
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Yann Girard
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Sylvie Rousset
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
| | - Robert Sporken
- Research Center in Physics of Matter and Radiation (PMR), Université de Namur, 61 Rue de Bruxelles, 5000 Namur, Belgium
| | | | - Jérôme Lagoute
- MPQ, Université Paris Diderot-Paris 7, Sorbonne Paris Cité, CNRS, UMR 7162, 10, rue A. Domon et L. Duquet, 75205 Paris 13, France
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12
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Davari N, Haghdani S, Åstrand PO, Schatz GC. Local electric field factors by a combined charge-transfer and point–dipole interaction model. RSC Adv 2015. [DOI: 10.1039/c5ra04183j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A model for the local electric field as a linear response to a frequency-dependent external electric field is presented based on a combined charge-transfer and point–dipole interaction force-field model.
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Affiliation(s)
- Nazanin Davari
- Department of Chemistry
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
| | - Shokouh Haghdani
- Department of Chemistry
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
| | - Per-Olof Åstrand
- Department of Chemistry
- Norwegian University of Science and Technology (NTNU)
- Trondheim
- Norway
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13
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Haghdani S, Davari N, Sandnes R, Åstrand PO. Complex Frequency-Dependent Polarizability through the π → π* Excitation Energy of Azobenzene Molecules by a Combined Charge-Transfer and Point-Dipole Interaction Model. J Phys Chem A 2014; 118:11282-92. [DOI: 10.1021/jp507639z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shokouh Haghdani
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
| | - Nazanin Davari
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
| | - Runar Sandnes
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
| | - Per-Olof Åstrand
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), N-7491 Trondheim, Norway
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14
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Voora VK, Jordan KD. Nonvalence correlation-bound anion states of spherical fullerenes. NANO LETTERS 2014; 14:4602-4606. [PMID: 24978808 DOI: 10.1021/nl5016574] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present a one-electron model Hamiltonian for characterizing nonvalence correlation-bound anion states of fullerene molecules. These states are the finite system analogs of image potential states of metallic surfaces. The model potential accounts for both atomic and charge-flow polarization and is used to characterize the nonvalence correlation-bound anion states of the C60, (C60)2, C240, and C60@C240 fullerene systems. Although C60 is found to have a single (s-type) nonvalence correlation-bound anion state, the larger fullerenes are demonstrated to have multiple nonvalence correlation-bound anion states.
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Affiliation(s)
- Vamsee K Voora
- Department of Chemistry and Center for Molecular and Materials Simulations, University of Pittsburgh , Pittsburgh Pennsylvania 15260, United States
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15
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Bodrenko IV, Della Sala F. A periodic charge-dipole electrostatic model. II. A kinetic-exchange-correlation correction. J Chem Phys 2013; 139:144109. [PMID: 24116605 DOI: 10.1063/1.4824189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We extend the periodic charge-dipole electrostatic model, see I. V. Bodrenko, M. Sierka, E. Fabiano, and F. Della Sala, J. Chem. Phys. 137, 134702 (2012), to include a kinetic-exchange-correlation (KXC) correction. The KXC correction is approximated by means of an extended-Hückel-type formula, it is exact in the infinite jellium model and it is also computationally efficient as it requires only the computation of overlap integrals. Tests on the linear response of silver slabs to an external electrostatic perturbation show that the KXC correction yields a very accurate description of induced dipole and of the whole induced charge density profile. We also show that the KXC parameters are quite transferable and related to the atomic polarizability.
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Affiliation(s)
- I V Bodrenko
- National Nanotechnology Laboratory (NNL), Istituto Nanoscienze-CNR, Via per Arnesano 16, 73100 Lecce, Italy
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16
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Smalø HS, Åstrand PO, Mayer A. Combined nonmetallic electronegativity equalisation and point–dipole interaction model for the frequency-dependent polarisability. Mol Phys 2013. [DOI: 10.1080/00268976.2013.797116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Hans S. Smalø
- a Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
| | - Per-Olof Åstrand
- a Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
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17
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Bodrenko IV, Sierka M, Fabiano E, Della Sala F. A periodic charge-dipole electrostatic model: parametrization for silver slabs. J Chem Phys 2012; 137:134702. [PMID: 23039605 DOI: 10.1063/1.4754719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present an extension of the charge-dipole model for the description of periodic systems. This periodic charge-dipole electrostatic model (PCDEM) allows one to describe the linear response of periodic structures in terms of charge- and dipole-type gaussian basis functions. The long-range electrostatic interaction is efficiently described by means of the continuous fast multipole method. As a first application, the PCDEM method is applied to describe the polarizability of silver slabs. We find that for a correct description of the polarizability of the slabs both charges and dipoles are required. However a continuum set of parametrizations, i.e., different values of the width of charge- and dipole-type gaussians, leads to an equivalent and accurate description of the slabs polarizability but a completely unphysical description of induced charge-density inside the slab. We introduced the integral squared density measure which allows one to obtain a unique parametrization which accurately describes both the polarizability and the induced density profile inside the slab. Finally the limits of the electrostatic approximations are also pointed out.
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Affiliation(s)
- I V Bodrenko
- National Nanotechnology Laboratory (NNL), Istituto Nanoscienze-CNR, Via per Arnesano 16, 73100 Lecce, Italy
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18
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Tkatchenko A, DiStasio RA, Car R, Scheffler M. Accurate and efficient method for many-body van der Waals interactions. PHYSICAL REVIEW LETTERS 2012; 108:236402. [PMID: 23003978 DOI: 10.1103/physrevlett.108.236402] [Citation(s) in RCA: 733] [Impact Index Per Article: 61.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Indexed: 05/21/2023]
Abstract
An efficient method is developed for the microscopic description of the frequency-dependent polarizability of finite-gap molecules and solids. This is achieved by combining the Tkatchenko-Scheffler van der Waals (vdW) method [Phys. Rev. Lett. 102, 073005 (2009)] with the self-consistent screening equation of classical electrodynamics. This leads to a seamless description of polarization and depolarization for the polarizability tensor of molecules and solids. The screened long-range many-body vdW energy is obtained from the solution of the Schrödinger equation for a system of coupled oscillators. We show that the screening and the many-body vdW energy play a significant role even for rather small molecules, becoming crucial for an accurate treatment of conformational energies for biomolecules and binding of molecular crystals. The computational cost of the developed theory is negligible compared to the underlying electronic structure calculation.
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Affiliation(s)
- Alexandre Tkatchenko
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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19
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Prezhdo V, Kowalski P, Kowalska T, Zubkova V, Olan K, Prezhdo O. Molecular polarizability anisotropy of some five-membered cyclic imides. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.04.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Tafipolsky M, Engels B. Accurate Intermolecular Potentials with Physically Grounded Electrostatics. J Chem Theory Comput 2011; 7:1791-803. [DOI: 10.1021/ct200185h] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maxim Tafipolsky
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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21
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Kanoun MB, Botek E, Champagne B. Electrostatic modeling of the linear optical susceptibilities of 2-methyl-4-nitroaniline, m-nitroaniline, 3-methyl-4-nitropyridine N-oxide and 2-carboxylic acid-4-nitropyridine-1-oxide crystals. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Lopes PEM, Roux B, MacKerell AD. Molecular modeling and dynamics studies with explicit inclusion of electronic polarizability. Theory and applications. Theor Chem Acc 2009; 124:11-28. [PMID: 20577578 PMCID: PMC2888514 DOI: 10.1007/s00214-009-0617-x] [Citation(s) in RCA: 265] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A current emphasis in empirical force fields is on the development of potential functions that explicitly treat electronic polarizability. In the present article, the commonly used methodologies for modelling electronic polarization are presented along with an overview of selected application studies. Models presented include induced point-dipoles, classical Drude oscillators, and fluctuating charge methods. The theoretical background of each method is followed by an introduction to extended Langrangian integrators required for computationally tractable molecular dynamics simulations using polarizable force fields. The remainder of the review focuses on application studies using these methods. Emphasis is placed on water models, for which numerous examples exist, with a more thorough discussion presented on the recently published models associated with the Drude-based CHARMM and the AMOEBA force fields. The utility of polarizable models for the study of ion solvation is then presented followed by an overview of studies of small molecules (e.g. CCl(4), alkanes, etc) and macromolecule (proteins, nucleic acids and lipid bilayers) application studies. The review is written with the goal of providing a general overview of the current status of the field and to facilitate future application and developments.
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Affiliation(s)
- Pedro E. M. Lopes
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, 20 Penn Street, Baltimore, MD 21230, USA
| | - Benoit Roux
- Institute of Molecular Pediatric Sciences, Gordon Center for Integrative Science, University of Chicago 929 E. 57th St. Chicago, IL 60637
| | - Alexander D. MacKerell
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, 20 Penn Street, Baltimore, MD 21230, USA
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Mayer A, Schatz GC. Enhanced polarizability of aromatic molecules placed in the vicinity of silver clusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:325301. [PMID: 21693964 DOI: 10.1088/0953-8984/21/32/325301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We use a charge-dipole interaction model to study the polarizability of aromatic molecules that are placed between two silver clusters. In particular we examine the enhancement in polarizability induced by the clusters at plasmon-like resonant frequencies of the cluster-molecule-cluster system. The model used for these simulations relies on representation of the atoms by both a net electric charge and a dipole. By relating the time variation of the atomic charges to the currents that flow through the bonds of the structures considered, a least-action principle can be formulated that enables the atomic charges and dipoles to be determined. We consider benzene, naphthalene and anthracene for this study, comparing the polarizability of these aromatic molecules when placed in the middle between two Ag(120) clusters, with their polarizability as isolated molecules. We find that the polarizability of these molecules is enhanced by the clusters, and this increases the electromagnetic coupling between the two clusters. This results in significant red-shifting (by up to 0.8 eV) of the lowest energy optical transition in the cluster-molecule-cluster system compared to plasmon-like excitation in the cluster-cluster system. The resulting resonant polarizability enhancement leads to an electromagnetic enhancement in surface-enhanced Raman scattering of over 10(6).
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Affiliation(s)
- A Mayer
- FUNDP-University of Namur, Rue de Bruxelles 61, B-5000 Namur, Belgium
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Mayer A, González AL, Aikens CM, Schatz GC. A charge-dipole interaction model for the frequency-dependent polarizability of silver clusters. NANOTECHNOLOGY 2009; 20:195204. [PMID: 19420635 DOI: 10.1088/0957-4484/20/19/195204] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a charge-dipole interaction model for the calculation of the frequency-dependent polarizability of silver clusters. The model relies on the representation of silver atoms by both a net electric charge and a dipole. Time variations of the atomic charges are related to the currents that flow through the bonds of the structures considered and the atomic charges and dipoles are eventually determined from the application of a least-action principle. After a generalization that enables the bonds of the bulk and surface atoms to have specific resistances, the model is parameterized on data obtained by the time-dependent density functional theory for tetrahedral Ag(20), Ag(84) and Ag(120) clusters. We then study the polarization properties of dimers of silver clusters. We compare in particular the polarizability of the dimers with that of the isolated clusters, for a range of gap distances and frequencies. We also consider the field enhancements one can achieve with these systems. The results are in good agreement with reference data and enable an extension of these data to a wider range of situations. They show that significant field enhancements are achieved at frequencies associated with resonant polarization along the axis of the dimer.
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Affiliation(s)
- A Mayer
- FUNDP-University of Namur, Laboratoire de Physique du Solide, Namur, Belgium.
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25
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Guillaume M, Champagne B, Bégué D, Pouchan C. Electrostatic interaction schemes for evaluating the polarizability of silicon clusters. J Chem Phys 2009; 130:134715. [DOI: 10.1063/1.3104629] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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