Critical adsorption of polyelectrolytes onto charged Janus nanospheres

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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.contributor.institutionTampere Univ Technol
dc.date.accessioned2014-12-03T13:08:53Z
dc.date.available2014-12-03T13:08:53Z
dc.date.issued2014-01-01
dc.description.abstractBased on extensive Monte Carlo simulations and analytical considerations we study the electrostatically driven adsorption of flexible polyelectrolyte chains onto charged Janus nanospheres. These net-neutral colloids are composed of two equally but oppositely charged hemispheres. The critical binding conditions for polyelectrolyte chains are analysed as function of the radius of the Janus particle and its surface charge density, as well as the salt concentration in the ambient solution. Specifically for the adsorption of finite-length polyelectrolyte chains onto Janus nanoparticles, we demonstrate that the critical adsorption conditions drastically differ when the size of the Janus particle or the screening length of the electrolyte are varied. We compare the scaling laws obtained for the adsorption-desorption threshold to the known results for uniformly charged spherical particles, observing significant disparities. We also contrast the changes to the polyelectrolyte chain conformations close to the surface of the Janus nanoparticles as compared to those for simple spherical particles. Finally, we discuss experimentally relevant physicochemical systems for which our simulations results may become important. In particular, we observe similar trends with polyelectrolyte complexation with oppositely but heterogeneously charged proteins.en
dc.description.affiliationSao Paulo State Univ, Dept Phys, Sao Paulo, Brazil
dc.description.affiliationUniv Potsdam, Inst Phys & Astron, Potsdam, Germany
dc.description.affiliationTampere Univ Technol, Dept Phys, FIN-33101 Tampere, Finland
dc.description.affiliationUnespSao Paulo State Univ, Dept Phys, Sao Paulo, 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.extent15539-15550
dc.identifierhttp://dx.doi.org/10.1039/c4cp02207f
dc.identifier.citationPhysical Chemistry Chemical Physics. Cambridge: Royal Soc Chemistry, v. 16, n. 29, p. 15539-15550, 2014.
dc.identifier.doi10.1039/c4cp02207f
dc.identifier.issn1463-9076
dc.identifier.urihttp://hdl.handle.net/11449/111680
dc.identifier.wosWOS:000339173700057
dc.language.isoeng
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofPhysical Chemistry Chemical Physics
dc.relation.ispartofjcr3.906
dc.relation.ispartofsjr1,686
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleCritical adsorption of polyelectrolytes onto charged Janus nanospheresen
dc.typeArtigo
dcterms.rightsHolderRoyal Soc Chemistry
unesp.author.orcid0000-0002-9763-2797[1]
unesp.author.orcid0000-0002-6013-7020[2]

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