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Chikina I, Shikin V, Varlamov A. The Ohm Law as an Alternative for the Entropy Origin Nonlinearities in Conductivity of Dilute Colloidal Polyelectrolytes. ENTROPY 2020; 22:e22020225. [PMID: 33285999 PMCID: PMC7516655 DOI: 10.3390/e22020225] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/10/2020] [Accepted: 02/13/2020] [Indexed: 12/01/2022]
Abstract
We discuss the peculiarities of the Ohm law in dilute polyelectrolytes containing a relatively low concentration n⊙ of multiply charged colloidal particles. It is demonstrated that in these conditions, the effective conductivity of polyelectrolyte is the linear function of n⊙. This happens due to the change of the electric field in the polyelectrolyte under the effect of colloidal particle polarization. The proposed theory explains the recent experimental findings and presents the alternative to mean spherical approximation which predicts the nonlinear I–V characteristics of dilute colloidal polyelectrolytes due to entropy changes.
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Affiliation(s)
- Ioulia Chikina
- LIONS, NIMBE, CEA, CNRS, Universitè Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France;
| | | | - Andrey Varlamov
- CNR-SPIN, c/o DICII-Universitá di Roma Tor Vergata, Via del Politecnico, 1, 00133 Roma, Italy
- Correspondence:
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Jankowski A, Jankowski A, Kluczyk A, Szemik-Hojniak A. Effect of neutral salts on the excited state proton transfer in the fluorescent probe anchored to the uncharged micelles. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.06.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Dahirel V, Zhao X, Jardat M. Comparison of different coupling schemes between counterions and charged nanoparticles in multiparticle collision dynamics. Phys Rev E 2016; 94:023317. [PMID: 27627422 DOI: 10.1103/physreve.94.023317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Indexed: 11/07/2022]
Abstract
We applied the multiparticle collision dynamics (MPC) simulation technique to highly asymmetric electrolytes in solution, i.e., charged nanoparticles and their counterions in a solvent. These systems belong to a domain of solute size which ranges between the electrolyte and the colloidal domains, where most analytical theories are expected to fail, and efficient simulation techniques are still missing. MPC is a mesoscopic simulation method which mimics hydrodynamics properties of a fluid, includes thermal fluctuations, and can be coupled to a molecular dynamics of solutes. We took advantage of the size asymmetry between nanoparticles and counterions to treat the coupling between solutes and the solvent bath within the MPC method. Counterions were coupled to the solvent bath during the collision step and nanoparticles either through a direct interaction force or with stochastic rotation rules which mimic stick boundary conditions. Moreover, we adapted the simulation procedure to address the issue of the strong electrostatic interactions between solutes of opposite charges. We show that the short-ranged repulsion between counterions and nanoparticles can be modeled by stochastic reflection rules. This simulation scheme is very efficient from a computational point of view. We have also computed the transport coefficients for various densities. The diffusion of counterions was found in one case to increase slightly with the volume fraction of nanoparticles. The deviation of the electric conductivity from the ideal behavior (solutes at infinite dilution without any direct interactions) is found to be strong.
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Affiliation(s)
- Vincent Dahirel
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8234, PHENIX, F-75005 Paris, France
| | - Xudong Zhao
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8234, PHENIX, F-75005 Paris, France
| | - Marie Jardat
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8234, PHENIX, F-75005 Paris, France
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Ancian B, Bernard O, Chevalet J, Dahirel V, Devilliers D, Dubois E, Dufrêche JF, Durand-Vidal S, Groult H, Jardat M, Lantelme F, Malikova N, Marry V, Mériguet G, Perzynski R, Rollet AL, Rotenberg B, Salanne M, Simon C. Pierre Turq, an inspirational scientist in charge and at interfaces. Mol Phys 2014. [DOI: 10.1080/00268976.2014.885094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lucas I, Durand-Vidal S, Bernard O, Dahirel V, Dubois E, Dufrêche J, Gourdin-Bertin S, Jardat M, Meriguet G, Roger G. Influence of the volume fraction on the electrokinetic properties of maghemite nanoparticles in suspension. Mol Phys 2014. [DOI: 10.1080/00268976.2014.906672] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Jankowski A, Wisniewski Ł, Jankowski A, Kluczyk A, Chmielewski P, Szemik-Hojniak A. Impact of micelle ionic electrical double layer structure on the excited state protolytic reaction in the fluorescent probe bound to the colloidal nanoparticles. J Phys Chem B 2011; 115:8078-87. [PMID: 21644566 DOI: 10.1021/jp110670j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The fluorescent probe, 2-hydroxynaphthalene(dodecylo)-6-sulfonamide (NSDA) bound selectively to shear plane of various electrostatic charges was synthesized and its photophysical properties have been investigated by means of steady state fluorescence and nanosecond time-resolved spectroscopy. Our experimental data allowed us to determine the excited state proton transfer (ESPT) rate and equilibrium constants of NSDA bound to micelles and to estimate the electric potential value (Ψ) at the particle surface. The spatial dependence of proton movement velocity through electric double layer (EDL) of micelles has been thoroughly analyzed. In this article, a new approach of estimating the values of the micelle potential (Ψ(R)) from the excited state proton transfer rate constant of the fluorescent probe bound at a certain distance (R) to a micellar surface has been proposed. The Ψ(R) values, obtained in this way, are compared with electrophoretic values of the particle potential (ζ). Our results on electrophoretic potentials and the reaction course of the ESPT in colloidal environment may contribute to a deeper understanding of micellar interactions and behavior of the living cells in contact with various diluted substances such as pharmacological drugs, hormones, proteins, and other colloidal particles.
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Dahirel V, Jardat M, Dufrêche JF, Lucas I, Durand-Vidal S, Turq P. Coarse-graining in suspensions of charged nanoparticles. PURE APPL CHEM 2008. [DOI: 10.1351/pac200880061229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A coarse-grain description of nanocolloidal suspensions in the presence of an added salt is presented here. It enables us to simulate trajectories of the nanoparticles from effective functions that depend on average densities of salt ions. In practice, the ion-averaged effective potential is used as input of a Brownian dynamics (BD) simulation. This potential may be derived by various methods, ranging from purely analytical to fully numerical ones. For the description of dynamical properties, this simulation also requires an effective diffusion coefficient that must be calculated or experimentally determined, and that accounts for the effects of microions on the mobility of the nanoparticles. The different versions of our coarse-graining procedure are applied to the case of a maghemite suspension, for which an explicit description of all ions would be very time-consuming.
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Affiliation(s)
- Vincent Dahirel
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
| | - Marie Jardat
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
| | - Jean-François Dufrêche
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
| | - Ivan Lucas
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
| | - Serge Durand-Vidal
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
| | - Pierre Turq
- 1Ionic Liquids and Charged Interfaces Laboratory, Université Pierre et Maire Curie-Paris 6, UMR CNRS 761 2, case courrier 51, 4 place Jussieu F-75005 Paris Cedex 05, France
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Dahirel V, Jardat M, Dufrêche JF, Turq P. Ion-mediated interactions between charged and neutral nanoparticles. Phys Chem Chem Phys 2008; 10:5147-55. [DOI: 10.1039/b806315j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Dahirel V, Jardat M, Dufrêche JF, Turq P. How the excluded volume architecture influences ion-mediated forces between proteins. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:040902. [PMID: 17994928 DOI: 10.1103/physreve.76.040902] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Indexed: 05/25/2023]
Abstract
The effective interactions between model proteins of various shapes are computed by means of Monte Carlo simulations. In particular, we determine how the modification of the excluded volume architecture influences both entropic and purely electrostatic ion-mediated forces between proteins. We find that interprotein interactions are strongly affected by protein shape, which results in a high decrease of electrostatic screening for typical active site geometries. Effective interactions are then closer to the direct Coulombic interactions, and both affinity and selectivity are enhanced by several orders of magnitude.
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Affiliation(s)
- V Dahirel
- Laboratoire Liquides Ioniques et Interfaces Chargées, UMR CNRS 7612, Université Pierre et Marie Curie-Paris 6, case courrier 51, 4 place Jussieu F-75252, Paris Cedex 05, France
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Dahirel V, Jardat M, Dufrêche JF, Turq P. Toward the description of electrostatic interactions between globular proteins: Potential of mean force in the primitive model. J Chem Phys 2007; 127:095101. [PMID: 17824765 DOI: 10.1063/1.2767626] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Monte Carlo simulations are used to calculate the exact potential of mean force between charged globular proteins in aqueous solution. The aim of the present paper is to study the influence of the ions of the added salt on the effective interaction between these nanoparticles. The charges of the model proteins, either identical or opposite, are either central or distributed on a discrete pattern. Contrarily to Poisson-Boltzmann predictions, attractive, and repulsive direct forces between proteins are not screened similarly. Moreover, it has been shown that the relative orientations of the charge patterns strongly influence salt-mediated interactions. More precisely, for short distances between the proteins, ions enhance the difference of the effective forces between (i) like-charged and oppositely charged proteins, (ii) attractive and repulsive relative orientations of the proteins, which may affect the selectivity of protein/protein recognition. Finally, such results observed with the simplest models are applied to a more elaborate one to demonstrate their generality.
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Affiliation(s)
- Vincent Dahirel
- Université Pierre et Marie Curie-Paris 6, Laboratoire Liquides Ioniques et Interfaces Chargées, UMR CNRS 7612, Case Courrier 51, 4 Place Jussieu 75005 Paris, France.
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