Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Interactions between silica surfaces coated by polyelectrolyte multilayers in aqueous environment : comparison between precursor and multilayer regime

Title data

Bosio, Vera ; Dubreuil, Frederic ; Bogdanovic, Goran ; Fery, Andreas:
Interactions between silica surfaces coated by polyelectrolyte multilayers in aqueous environment : comparison between precursor and multilayer regime.
In: Colloids and Surfaces A : Physicochemical and Engineering Aspects. Vol. 243 (August 2004) Issue 1-3 . - pp. 147-155.
ISSN 1873-4359
DOI: https://doi.org/10.1016/j.colsurfa.2004.06.011

Official URL: Volltext

Abstract in another language

We have investigated the polyelectrolyte multilayer build-up of positively charged poly(allylamine hydrochloride) (PAH) and negatively charged poly(sodium 4-styrenesulfate) (PSS), adsorbed to oxidised silicon wafers and colloidal silica substrates. Properties of multilayers with a first layer of polyethylenimine (PEI), were compared with the pure PAH/PSS multilayers. Ellipsometric thickness measurements show that the initial five layers, "precursor regime", have lower layer thickness than the layers adsorbed later in the adsorption cycle. Heterogeneity in the pure PAH/PSS multilayers in the precursor regime is seen in AFM images. This heterogeneity is further expressed as qualitative differences in adhesion in different positions on the film. Once a sufficient number of layers are adsorbed, i.e. when the true multilayer regime is reached, no effects of heterogeneity are seen anymore and the layer thickness increase becomes constant. With a PEI first layer, the heterogeneity effects in the precursor regime are eliminated, without any change of the thickness. Furthermore, the PEI layer dramatically decreases the roughness of the film in the precursor regime.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: No
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 09 Dec 2014 09:59
Last Modified: 23 Feb 2015 12:44
URI: https://eref.uni-bayreuth.de/id/eprint/4045