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Formation, chemical composition, and structure of polyelectrolyte-nanoparticle multilayer films
YKI – Ytkemiska institutet.
2002 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 18, 6410-6415 p.Article in journal (Refereed)
Abstract [en]

The buildup and structure of multilayer films containing cationic polyelectrolyte and silica nanoparticles have been studied by means of ellipsometry, atomic force microscopy, and X-ray photoelectron spectroscopy. Emphasis was placed on the effect of ionic strength on the adsorption behavior and structure formation. Consecutive exposure of a silica substrate to low ionic strength solutions containing polyelectrolyte and nanoparticles resulted in the formation of stable adsorbed films with a reproducible stratified multilayer structure. The films formed in high ionic strength solutions were initially much thicker but also clearly less stable. A significant desorption was observed to take place in conjunction with the second exposure to silica nanoparticles. The effect of electrolyte concentration is discussed in terms of a salt-induced glass-liquid transition, above which the relaxation rate in the adsorbed composite film increases and thereby hinders the formation of multilayer structures

Place, publisher, year, edition, pages
2002. Vol. 18, 6410-6415 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27207OAI: oai:DiVA.org:ri-27207DiVA: diva2:1054211
Note
A1596Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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