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We investigate the reliability of simulations of polyelectrolyte systems in aqueous environments, simulations that are performed using an efficient multi scale coarse grained polarizable pseudo-particle particle approach, denoted as pppl,…

软凝聚态物质 · 物理学 2024-01-01 Michel Masella , Fabien Léonforté

Strong coupling phenomena, such as the like charged macroions attraction, opposite charged macroions repulsion, charge renormalization or charge inversion, are known to be mediated by multivalent counterions. Most theories treat the…

软凝聚态物质 · 物理学 2016-02-03 Sandipan Dutta , Y. S. Jho

The structure of the double-layer formed at the surface of carbon electrodes is governed by the interactions between the electrode and the electrolyte species. However, carbon is notoriously difficult to simulate accurately, even with…

The interplay between electrostatic interactions and orientational correlations is studied for a model system of charged rods positioned on a chain, using Monte Carlo simulation techniques. It is shown that the coupling brings about the…

软凝聚态物质 · 物理学 2009-11-13 Hossein Fazli , Ramin Golestanian , Mohammad R. Kolahchi

Molecular dynamics simulation and recent theory are used to examine density correlations in semidilute solutions of highly charged, intrinsically flexible and hydrophilic polyelectrolytes in low salt. Quantitative comparison with no…

软凝聚态物质 · 物理学 2021-07-06 James P. Donley , David R. Heine

We develop a first-principle equation of state of salt-free polyelectrolyte solution in the limit of infinitely long flexible polymer chains in the framework of a field-theoretical formalism beyond the linear Debye-Hueckel theory and…

软凝聚态物质 · 物理学 2015-08-04 Yu. A. Budkov , A. L. Kolesnikov , N. Georgi , E. A. Nogovitsyn , M. G. Kiselev

Adsorption of multivalent counterions on the charged surface of a macroion is known to lead to inversion of the macroion charge due to the strong lateral correlations of counterions. We consider a nontrivial role of the excluded volume of…

软凝聚态物质 · 物理学 2009-11-07 Toan T. Nguyen , Boris I. Shklovskii

In this work we theoretically study the differential capacitance of an aqueous electrolyte in contact with a planar electrode, using classical Density Functional Theory, and show how this measurable quantity can be used as a probe to better…

软凝聚态物质 · 物理学 2021-09-16 Peter Cats , René van Roij

Monte Carlo simulations were employed to study two negative rods confined between two parallel plates. The system is immersed in a 1-1 restricted primitive model electrolyte. Ion distributions and forces per unit of area (pressures) on rods…

介观与纳米尺度物理 · 物理学 2015-05-20 G. Odriozola , F. Jiménez-Ángeles , M. Lozada-Cassou

We employ monomer-resolved Molecular Dynamics simulations and theoretical considerations to analyze the conformations of multiarm polyelectrolyte stars close to planar, uncharged walls. We identify three mechanisms that contribute to the…

软凝聚态物质 · 物理学 2009-11-11 Martin Konieczny , Christos N. Likos

The equilibrium properties of hard rod monolayers are investigated in a lattice model (where position and orientation of a rod are restricted to discrete values) as well as in an off--lattice model featuring spherocylinders with continuous…

软凝聚态物质 · 物理学 2016-09-21 M. Oettel , M. Klopotek , M. Dixit , E. Empting , T. Schilling , H. Hansen--Goos

We study the effect of the presence of a regular substrate pattern on the irreversible adsorption of nanosized and colloid particles. Deposition of disks of radius $r_0$ is considered, with the allowed regions for their center attachment at…

统计力学 · 物理学 2010-10-12 N. A. M. Araujo , A. Cadilhe , Vladimir Privman

In this paper a planar electromagnetic absorber is introduced whose performance is maintained over a wide change of the incidence angle for both TE and TM polarization. The absorber comprises an array of patches over a grounded dielectric…

经典物理 · 物理学 2015-05-13 Olli Luukkonen , Filippo Costa , Agostino Monorchio , Sergei A. Tretyakov

We perform Monte Carlo simulations to study the elastic properties of the helix-coil worm-like chain model of alpha-helical polypeptides. In this model the secondary structure enters as a scalar (Ising like) variable that controls the local…

软凝聚态物质 · 物理学 2007-05-23 Buddhapriya Chakrabarti , Alex J. Levine

Structural and thermodynamic properties of the model solution containing charged oligomers and the equivalent number of counterions were studied by means of the canonical Monte Carlo simulation technique. The oligomers are represented as…

软凝聚态物质 · 物理学 2012-02-21 T. Sajevic , J. Rescic , V. Vlachy

Constant temperature molecular dynamics simulations were used to study solutions of flexible polyelectrolyte chains at nonzero concentrations with explicit counterions and unscreened coulombic interactions. Counterion condensation, measured…

统计力学 · 物理学 2009-10-31 J. C. Chu , C. H. Mak

The effect of the adsorption of a polypeptide on the lateral interaction of dimyristoylphosphatidylserine molecules in different phase states on the surface of a 10\,mM KCl aqueous solution has been studied. Changes in the surface pressure…

We study the adsorption of homogeneous or heterogeneous polymers onto heterogeneous planar surfaces with exponentially decaying site-site correlations, using a variational reference system approach. As a main result, we derive simple…

软凝聚态物质 · 物理学 2009-11-11 Alexey Polotsky , Friederike Schmid , Andreas Degenhard

We study the conformational behavior of a polymer adsorbed at an attractive nanostring and construct the complete structural phase diagram in dependence of the binding strength and effective thickness of the string. For this purpose, Monte…

软凝聚态物质 · 物理学 2011-03-11 Thomas Vogel , Michael Bachmann

We present a theory for the equilibrium structure of polyelectrolyte solutions. The main element is a simple, new optimization scheme that allows theories such as the random phase approximation (RPA) to handle the harsh repulsive forces…

软凝聚态物质 · 物理学 2009-11-10 James P. Donley , David R. Heine , David T. Wu