Critical adsorption of polyelectrolytes onto planar and convex highly charged surfaces: the nonlinear Poisson-Boltzmann approach

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dc.contributor.authorCarvalho, Sidney J. de [UNESP]
dc.contributor.authorMetzler, Ralf
dc.contributor.authorCherstvy, Andrey G.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Potsdam
dc.date.accessioned2018-11-26T15:31:19Z
dc.date.available2018-11-26T15:31:19Z
dc.date.issued2016-08-18
dc.description.abstractWe study the adsorption-desorption transition of polyelectrolyte chains onto planar, cylindrical and spherical surfaces with arbitrarily high surface charge densities by massive Monte Carlo computer simulations. We examine in detail how the well known scaling relations for the threshold transition demarcating the adsorbed and desorbed domains of a polyelectrolyte near weakly charged surfaces-are altered for highly charged interfaces. In virtue of high surface potentials and large surface charge densities, the Debye-Huckel approximation is often not feasible and the nonlinear Poisson-Boltzmann approach should be implemented. At low salt conditions, for instance, the electrostatic potential from the nonlinear Poisson-Boltzmann equation is smaller than the Debye-Huckel result, such that the required critical surface charge density for polyelectrolyte adsorption sigma(c) increases. The nonlinear relation between the surface charge density and electrostatic potential leads to a sharply increasing critical surface charge density with growing ionic strength, imposing an additional limit to the critical salt concentration above which no polyelectrolyte adsorption occurs at all. We contrast our simulations findings with the known scaling results for weak critical polyelectrolyte adsorption onto oppositely charged surfaces for the three standard geometries. Finally, we discuss some applications of our results for some physical-chemical and biophysical systems.en
dc.description.affiliationSao Paulo State Univ, Inst Biosci Letters & Exact Sci, BR-15054000 Sao Jose Do Rio Preto, Brazil
dc.description.affiliationUniv Potsdam, Inst Phys & Astron, D-14476 Potsdam, Germany
dc.description.affiliationUnespSao Paulo State Univ, Inst Biosci Letters & Exact Sci, BR-15054000 Sao Jose Do Rio Preto, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipDeutsche Forschungsgemeinschaft
dc.description.sponsorshipUniversity of Potsdam
dc.description.sponsorshipUNESP
dc.description.sponsorshipDepartment of Physics of IBILCE/Sao Jose do Rio Preto
dc.description.sponsorshipIdFAPESP: 15/15297-4
dc.format.extent17
dc.identifierhttp://dx.doi.org/10.1088/1367-2630/18/8/083037
dc.identifier.citationNew Journal Of Physics. Bristol: Iop Publishing Ltd, v. 18, 17 p., 2016.
dc.identifier.doi10.1088/1367-2630/18/8/083037
dc.identifier.fileWOS000384011300004.pdf
dc.identifier.issn1367-2630
dc.identifier.urihttp://hdl.handle.net/11449/159098
dc.identifier.wosWOS:000384011300004
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofNew Journal Of Physics
dc.relation.ispartofsjr1,653
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectpolyelectrolyte adsorption
dc.subjectelectrostatic interactions
dc.subjectcritical phenomena
dc.subjectDebye screening
dc.titleCritical adsorption of polyelectrolytes onto planar and convex highly charged surfaces: the nonlinear Poisson-Boltzmann approachen
dc.typeArtigo
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.author.orcid0000-0002-6013-7020[2]

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