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Titolo:
INTERACTION AND CONFORMATION OF POLYELECTROLYTE CHAINS ABSORBED ON NEUTRAL SURFACES
Autore:
SJOSTROM L; AKESSON T; JONSSON B;
Indirizzi:
CHEM CTR LUND,POB 124 S-22100 LUND SWEDEN
Titolo Testata:
The Journal of chemical physics
fascicolo: 6, volume: 99, anno: 1993,
pagine: 4739 - 4747
SICI:
0021-9606(1993)99:6<4739:IACOPC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
POISSON-BOLTZMANN EQUATION; DOUBLE-LAYER FORCES; MONTE-CARLO; CHARGED SURFACES; ELECTROLYTE-SOLUTIONS; POLY-ELECTROLYTES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
L. Sjostrom et al., "INTERACTION AND CONFORMATION OF POLYELECTROLYTE CHAINS ABSORBED ON NEUTRAL SURFACES", The Journal of chemical physics, 99(6), 1993, pp. 4739-4747

Abstract

Monte Carlo simulations are used to study the conformation of surfacebound polyelectrolytes and how two such surfaces interact. The linearpolyelectrolyte chains consist of charged monomers connected via simple harmonic bonds, and all electrostatic interactions are treated within a dielectric continuum model. The interaction between the polyelectrolyte covered surfaces is found to be strongly repulsive, significantly stronger than the usual double layer force. The increased repulsionis due to an expansion of the chains perpendicular to the surfaces, which in turn is driven by the counterion entropy. Simple scaling laws are derived, showing the expansion to increase linearly with the number of monomers. The osmotic pressure in a polyelectrolyte double layer can be shown to be related to the pressure in a simple double layer via a relation of corresponding states.

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Documento generato il 25/11/20 alle ore 10:01:24