Polye1ectrolytes

Katchalsky, A.

doi:10.1351/pac197126030327

Cited by 388 publications

(288 citation statements)

References 0 publications

Supporting

Mentioning

277

Contrasting

Unclassified

Order By: Relevance

“…This is a relevant special case, applying to quite a few biologically important polyelectrolytes with a large persistence length, like DNA, actin filaments or microtubules. Within PB theory [57] and on the level of a cell model the cylindrical geometry can be treated exactly in the salt-free case [42,58,59,60,61,62,63], providing for instance new insights into the phenomenon of the Manning condensation [64,65]. For low line charges, the agreement between PB theory and the simulations of the full interaction system is rather nice.…”

Section: Rodlike Polyelectrolytesmentioning

confidence: 99%

Computer Simulations of Charged Systems

Holm

Kremer

2001

Electrostatic Effects in Soft Matter and Biophysics

View full text Add to dashboard Cite

Abstract. In this brief contribution to the Proceedings of the NATO-ASI on "Electrostatic Effects in Soft Matter and Biophysics" [1], which took place in Les Houches from Oct. 1-13, 2000, we summarize in short aspects of the simulations methods to study charged systems. After describing some basics of Monte Carlo and Molecular dynamics techniques, we describe a few methods to compute long range interactions in periodic systems. After a brief detour to mean-field models, we describe our results obtained for flexible polyelectrolytes in good and bad solvents. We follow with a description of the inhomogeneity of the counterion distribution around finite chains, and continue then with infinitely long, rodlike systems. The last part is devoted to the phenomenon of overcharging for colloidal particles and its explanation in terms of simple electrostatic arguments.

show abstract

Section: Rodlike Polyelectrolytesmentioning

confidence: 99%

Computer Simulations of Charged Systems

Holm

Kremer

2001

Electrostatic Effects in Soft Matter and Biophysics

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5] The high electric field of the macroion strongly couples to the counterions, which in turn will tend to partly neutralize the macroion. This phenomenon has been termed "counterion condensation".…”

Section: Introductionmentioning

confidence: 99%

“…A great number of experimental studies of φ for strongly charged polyelectrolytes is now available in literature, demonstrating that φ is of the order of 0.2 to 0.3 for univalent counterions in the dilute regime. [1][2][3][10][11][12][13][14][15][16][17] Furthermore, a comparison of experimental data obtained for different counterions show that specific interactions between counterions and the macroion can lead to an additional reduction of the measured osmotic pressure. 1,3 In case of monovalent counterions, these specific effects are small as compared to the effect of counterion condensation that presents the dominant feature of strongly charged polyelectrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][10][11][12][13][14][15][16][17] Furthermore, a comparison of experimental data obtained for different counterions show that specific interactions between counterions and the macroion can lead to an additional reduction of the measured osmotic pressure. 1,3 In case of monovalent counterions, these specific effects are small as compared to the effect of counterion condensation that presents the dominant feature of strongly charged polyelectrolytes. A detailed discussion of this problem has been given by Mandel. 1 However, no quantitative conclusions could be drawn from this comparison so far, since practically all experimental data have been obtained from solutions of flexible polyelectrolytes, which change their conformation upon lowering the ionic strength.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The osmotic coefficient of rod-like polyelectrolytes: Computer simulation, analytical theory, and experiment

Deserno

Holm

Blaul

et al. 2001

The European Physical Journal E

View full text Add to dashboard Cite

The osmotic coefficient of solutions of rod-like polyelectrolytes is considered by comparing current theoretical treatments and simulations to recent experimental data. The discussion is restricted to the case of monovalent counterions and dilute, salt-free solutions. The classical PoissonBoltzmann solution of the cell model correctly predicts a strong decrease in the osmotic coefficient, but upon closer look systematically overestimates its value. The contribution of ion-ion-correlations are quantitatively studied by MD simulations and the recently proposed DHHC theory. However, our comparison with experimental data obtained on synthetic, stiff-chain polyelectrolytes shows that correlation effects can only partly explain the discrepancy. A quantitative understanding thus requires theoretical efforts beyond the restricted primitive model of electrolytes.

show abstract

“…An alternative analogy of great interest is offered by thermodynamics of irreversible processes applied to "dissipative structures" (Katchalsky, 1971, andpersonal communication, 1971). The risks are appreciable of once again confusing neural massive activity with energy and neural waves with electromagnetic or fluid waves, but the usefulness of partial differential equations in both domains seems overriding, particularly as the means for predicting and measuring those properties of a system at a higher level, which emerge from the strong interaction of massive numbers of parts at a lower level in a multilevel hierarchy.…”

mentioning

confidence: 99%