Authors Warenda, M. ; Richter, A. ; Schmidt, D. ; Janke, A. ; Müller, M. ; Simon, F. ; Zimmermann, R. ; Eichhorn, K.-J. ; Voit, B. ; Appelhans, D.
Title Fabrication pH-stable and swellable very thin hyperbranched poly(ethylene imine)- oligosaccharide films fabricated without precoating: first view on protein adsorption
Date 07.09.2012
Number 34502
Abstract For using successful (ultra)thin dendritic macromolecule films in (bio)sensing and microfluidic devices and for obtaining reproducible film properties, alteration effects arising from precoatings have to be avoided. Here, oligosaccharide-modified hyperbranched poly(ethylene imine)s (PEI-OS) were used to fabricate very thin PEI-OS films (15–20 nm in dry state), cross-linked with citric acid under condensation, and vacuum condition. However, no reactive precoating is necessary to obtain stable films, which allows very simple film preparation and avoids alteration of the PEIS-OS film properties arising from precoating. Several methods [(in situ) ellipsometry, AFM, XPS, (in situ) ATR-IR, streaming potential measurements] were applied to characterize homogeneity, surface morphology, and stability of these PEI-OS films between pH 2 and pH 10, but also the low protein adsorption behavior.
Publisher Macromolecular Rapid Communications
Wikidata Q57777294
Citation Macromolecular Rapid Communications 33 (2012) 1466-1473
Tags dendritic glycopolymer in situ ellipsometry poly(ethylene imine) protein adsorption thin film technology biological-properties responsive surfaces spectroscopy multilayers morphology interface maltose layers gold atp

Back to list