Temperature effect on the build-up of exponentially growing polyelectrolyte multilayers. An exponential-to-linear transition point

dc.contributor.authorVikulina, Anna S.
dc.contributor.authorAnissimov, Yuri G.
dc.contributor.authorSingh, Prateek
dc.contributor.authorProkopović, Vladimir Z.
dc.contributor.authorUhlig, Katja
dc.contributor.authorJaeger, Magnus S.
dc.contributor.authorKlitzing, Regine von
dc.contributor.authorDuschl, Claus
dc.contributor.authorVolodkin, Dmitry
dc.date.accessioned2017-10-24T06:17:16Z
dc.date.available2017-10-24T06:17:16Z
dc.date.issued2016
dc.description.abstractIn this study, the effect of temperature on the build-up of exponentially growing polyelectrolyte multilayer films was investigated. It aims at understanding the multilayer growth mechanism as crucially important for the fabrication of tailor-made multilayer films. Model poly(L-lysine)/hyaluronic acid (PLL/HA) multilayers were assembled in the temperature range of 25-85 degrees C by layer-by-layer deposition using a dipping method. The film growth switches from the exponential to the linear regime at the transition point as a result of limited polymer diffusion into the film. With the increase of the build-up temperature the film growth rate is enhanced in both regimes; the position of the transition point shifts to a higher number of deposition steps confirming the diffusion-mediated growth mechanism. Not only the faster polymer diffusion into the film but also more porous/permeable film structure are responsible for faster film growth at higher preparation temperature. The latter mechanism is assumed from analysis of the film growth rate upon switching of the preparation temperature during the film growth. Interestingly, the as-prepared films are equilibrated and remain intact (no swelling or shrinking) during temperature variation in the range of 25-45 degrees C. The average activation energy for complexation between PLL and HA in the multilayers calculated from the Arrhenius plot has been found to be about 0.3 kJ mol(-1) for monomers of PLL. Finally, the following processes known to be dependent on temperature are discussed with respect to the multilayer growth: (i) polymer diffusion, (ii) polymer conformational changes, and (iii) inter-polymer interactions.en
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.pmid26911320
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6881
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6220
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.titleTemperature effect on the build-up of exponentially growing polyelectrolyte multilayers. An exponential-to-linear transition pointen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c6cp00345a
dcterms.bibliographicCitation.issue11
dcterms.bibliographicCitation.journaltitlePhysical chemistry, chemical physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend7874
dcterms.bibliographicCitation.pagestart7866
dcterms.bibliographicCitation.volume18
tub.accessrights.dnbfree
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlin

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