Publicação:
Inverted critical adsorption of polyelectrolytes in confinement

dc.contributor.authorCarvalho, Sidney J. de [UNESP]
dc.contributor.authorMetzler, Ralf
dc.contributor.authorCherstvy, Andrey G.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionTampere Univ Technol
dc.contributor.institutionUniv Potsdam
dc.date.accessioned2015-10-22T06:33:06Z
dc.date.available2015-10-22T06:33:06Z
dc.date.issued2015-01-01
dc.description.abstractWhat are the fundamental laws for the adsorption of charged polymers onto oppositely charged surfaces, for convex, planar, and concave geometries? This question is at the heart of surface coating applications, various complex formation phenomena, as well as in the context of cellular and viral biophysics. It has been a long-standing challenge in theoretical polymer physics; for realistic systems the quantitative understanding is however often achievable only by computer simulations. In this study, we present the findings of such extensive Monte-Carlo in silico experiments for polymer-surface adsorption in confined domains. We study the inverted critical adsorption of finite-length polyelectrolytes in three fundamental geometries: planar slit, cylindrical pore, and spherical cavity. The scaling relations extracted from simulations for the critical surface charge density sigma(c)-defining the adsorption-desorption transition-are in excellent agreement with our analytical calculations based on the ground-state analysis of the Edwards equation. In particular, we confirm the magnitude and scaling of sigma(c) for the concave interfaces versus the Debye screening length 1/kappa and the extent of confinement a for these three interfaces for small kappa a values. For large kappa a the critical adsorption condition approaches the known planar limit. The transition between the two regimes takes place when the radius of surface curvature or half of the slit thickness a is of the order of 1/kappa. We also rationalize how sigma(c)(kappa) dependence gets modified for semi-flexible versus flexible chains under external confinement. We examine the implications of the chain length for critical adsorption-the effect often hard to tackle theoretically-putting an emphasis on polymers inside attractive spherical cavities. The applications of our findings to some biological systems are discussed, for instance the adsorption of nucleic acids onto the inner surfaces of cylindrical and spherical viral capsids.en
dc.description.affiliationSao Paulo State University, Institute of Biosciences, Letters and Exact Sciences, Sao Jose do Rio Preto, Brazil
dc.description.affiliationTampere University of Technology, Department of Physics, Tampere, Finland
dc.description.affiliationUniversity of Potsdam, Institute for Physics & Astronomy, 14476 Potsdam-Golm, Germany.
dc.description.affiliationUnespSao Paulo State University, Institute of Biosciences, Letters and Exact Sciences, Sao Jose do Rio Preto, Brazil
dc.description.sponsorshipAcademy of Finland (FiDiPro scheme)
dc.description.sponsorshipGerman Research Foundation (DFG)
dc.description.sponsorshipIdGerman Research Foundation (DFG): CH 707/5-1
dc.format.extent4430-4443
dc.identifierhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/SM/C5SM00635J#!divAbstract
dc.identifier.citationSoft Matter. Cambridge: Royal Soc Chemistry, v. 11, n. 22, p. 4430-4443, 2015.
dc.identifier.doi10.1039/c5sm00635j
dc.identifier.issn1744-683X
dc.identifier.urihttp://hdl.handle.net/11449/129700
dc.identifier.wosWOS:000355555100011
dc.language.isoeng
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofSoft Matter
dc.relation.ispartofjcr3.709
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleInverted critical adsorption of polyelectrolytes in confinementen
dc.typeArtigo
dcterms.rightsHolderRoyal Soc Chemistry
dspace.entity.typePublication
unesp.author.orcid0000-0002-6013-7020[2]
unesp.author.orcid0000-0002-9763-2797[1]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Biociências, Letras e Ciências Exatas, São José do Rio Pretopt
unesp.departmentFísica - IBILCEpt

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