Polymer multilayer film formation studied by in situ ellipsometry and electrochemistry

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Polymer multilayer film formation studied by in situ ellipsometry and electrochemistry

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dc.contributor.author Haberska, Karolina
dc.contributor.author Ruzgas, Tautgirdas
dc.date.accessioned 2009-08-21T10:23:45Z
dc.date.available 2009-08-21T10:23:45Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/2043/8510
dc.description.abstract Polyelectrolyte multilayer films adsorbed on gold surfaces were studied by combined ellipsometric and electrochemical methods. Multilayers were composed of “synthetic” (poly(4-styrenesulfonic acid) ammonium salt (PSS) and poly(allylamine hydrochloride) (PAH) (PSS/PAH)) and “semi-natural” (carboxymethyl cellulose (CMC) and chitosan (CHI) (CMC/CHI)) polyelectrolytes. It was found that only PSS/PAH Layer-by-Layer (LbL) assembled structures result in dense surface confined films that limit permeability of small molecules, such as ferri-/ferrocyanide. The PSS/PAH assemblies can be envisaged as films with pinholes, through which small molecules diffuse. During the LbL deposition process of these films a number of pinholes quickly decay. A representative pinhole diameter was found to be approximately 20 μm, which determines the diffusion of small molecules through LbL films, and yet remains constant when the film consists of a few LbL assembled polyelectrolyte bilayers. CMC/CHI LbL assemblies at gold electrode surfaces give very low density films, which do not limit the diffusion of ferri-/ferrocyanide between the surface of the electrode and the solution. en
dc.format.extent 9
dc.language.iso eng en
dc.publisher Elsevier
dc.subject Polyelectrolyte multilayers en
dc.subject Layer-by-Layer en
dc.subject Self assembly en
dc.subject Pinhole model en
dc.subject Membrane model en
dc.subject.classification Sciences en
dc.title Polymer multilayer film formation studied by in situ ellipsometry and electrochemistry en
dc.type Article, peer reviewed scientific en
dc.contributor.department Malmö University. Faculty of Health and Society en
dc.identifier.doi 10.1016/j.bioelechem.2009.05.007 en
dc.subject.srsc Research Subject Categories::NATURAL SCIENCES en
dc.subject.srsc Research Subject Categories::NATURAL SCIENCES::Chemistry en
dc.relation.ispartofpublication Bioelectrochemistry en
dc.relation.ispartofpublicationvolume 76 en
dc.format.ePage 161
dc.format.sPage 153
mahlocal.rights.oaType green
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