Simple model for attraction between like-charged polyions

Arenzon, Jeferson J.; Stilck, Jürgen F.; Levin, Yan

doi:10.1007/s100510050980

Cited by 117 publications

(145 citation statements)

References 7 publications

(12 reference statements)

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“…The standard mean-field Poisson-Boltzmann (PB) theory predicts repulsion between like-charged objects [11]. In contrast, incorporation of electrostatic correlations generates attractive interactions in agreement with a variety of experimental and numerical results [12][13][14][15][16][17][18][19][20][21][22]27]. The importance of electrostatic correlations can be quantified by means of the coupling parameter, Ξ = 2πq 3 ℓ…”

supporting

confidence: 53%

Attraction and unbinding of like-charged rods

et al. 2004

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Biomolecules: structure and physical properties. PACS. 61.20.Ja -Computer simulation of liquid structure. PACS. 87.15.Nn -Properties of solutions; aggregation and crystallization of macromolecules.Abstract. -We investigate the effective interaction between two like-charged rods in the regime of large coupling parameters using both Molecular Dynamics simulation techniques and the recently introduced strong-coupling theory. We obtain attraction between the rods for elevated Manning parameters accompanied by an equilibrium surface-to-surface separation of the order of the Gouy-Chapman length. A continuous unbinding between the rods is predicted at a threshold Manning parameter ξc = 2/3.Introduction. -In recent years, both experiments [1] and numerical simulations [2][3][4][5][6][7][8][9][10] showed that like-charged macroions can attract each other via effective forces of electrostatic origin; one prominent example is the formation of dense packages of DNA molecules (DNA condensates) [1]. These observations indicate like-charge attraction in the presence of multivalent counterions, at low temperatures or for large surface charge density on macroions, i.e. when electrostatic correlations between charged particles become increasingly important. The standard mean-field Poisson-Boltzmann (PB) theory predicts repulsion between like-charged objects [11]. In contrast, incorporation of electrostatic correlations generates attractive interactions in agreement with a variety of experimental and numerical results [12][13][14][15][16][17][18][19][20][21][22]27]. The importance of electrostatic correlations can be quantified by means of the coupling parameter, Ξ = 2πq 3 ℓ

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confidence: 53%

Attraction and unbinding of like-charged rods

et al. 2004

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“…Thus, addition of salt is expected to matter particularly close to the unbinding threshold of macroions. Other relevant subjects include the effect of finite polymer stiffness, the discrete charge pattern of macroions [26,36,58,62,63,65,67,94], and bundling of many charged polymers [10,16,31,52,65,76] in the strong coupling regime, which constitute interesting applications for the future.…”

Section: Concluding Remarks and Discussionmentioning

confidence: 99%

“…The energetic attraction in the strong-coupling regime, which results from structural correlations, was first obtained by Rouzina and Bloomfield [61] and investigated later by several workers [62,63,64,65,66,67,68,69,70,71]. The rigorous derivation of the expression (15) for the pressure was given using the asymptotic strong-coupling theory [69], which shows that Eq.…”

Section: B Strong-coupling Regime: Attractionmentioning

confidence: 91%

“…The main scenarios which are put forward to explain the phenomenon of like-charge attraction have gone beyond the mean-field level by demonstrating that this phenomenon can be reproduced quantitatively by inclusion of electrostatic correlations [19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,…”

Section: Introductionmentioning

confidence: 99%

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Electrostatic interactions in strongly coupled soft matter

Naji

Jungblut

Moreira

et al. 2005

Physica A: Statistical Mechanics and its Applications

182

373

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Charged soft-matter systems-such as colloidal dispersions and charged polymers-are dominated by attractive forces between constituent like-charged particles when neutralizing counterions of high charge valency are introduced. Such counter-intuitive effects indicate strong electrostatic coupling between like-charged particles, which essentially results from electrostatic correlations among counterions residing near particle surfaces. In this paper, the attraction mechanism and the structure of counterionic correlations are discussed in the limit of strong coupling based on recent numerical and analytical investigations and for various geometries (planar, spherical and cylindrical) of charged objects.

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“…so far reported in the literature, can only explain short-ranged like-charge attraction [41,42,43,12,44,45,46,47,14,48,49,50,51].…”

Section: Overcharging and Thomson Problemmentioning

confidence: 99%

Electrostatics in soft matter

Messina

2009

J. Phys.: Condens. Matter

197

216

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Abstract. Recent progress in the understanding of the effect of electrostatics in soft matter is presented. A vast amount of materials contains ions ranging from the molecular scale (e.g., electrolyte) to the meso/macroscopic one (e.g., charged colloidal particles or polyelectrolytes). Their (micro)structure and physicochemical properties are especially dictated by the famous and redoubtable long-ranged Coulomb interaction. In particular theoretical and simulational aspects, including the experimental motivations, will be discussed.

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Simple model for attraction between like-charged polyions

Abstract: PACS. 61.20.Qg Structure of associated liquids: electrolytes, molten salts, etc. - 61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling,

Cited by 117 publications

References 7 publications

Attraction and unbinding of like-charged rods

Attraction and unbinding of like-charged rods

Electrostatic interactions in strongly coupled soft matter

Electrostatics in soft matter

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