ORBi: Mahltig Boris - Desorption behaviour of regular adsorbed polyampholytic layers

Reference : Desorption behaviour of regular adsorbed polyampholytic layers


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/9120

Title :	Desorption behaviour of regular adsorbed polyampholytic layers
Language :	English
Author, co-author :	Mahltig, Boris [Gesellschaft zur Förderung von Medizin-, Bio- und Umwelttechnologien, Dresden, Germany > > > >]
	Gohy, Jean-François [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Jérôme, Robert [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
	Pfuetze, G. [Institut für Polymerforschung, Dresden, Germany > > > >]
	Stamm, Manfred [Institut für Polymerforschung, Dresden, Germany > > > >]
Publication date :	Jun-2003
Journal title :	Journal of Polymer Research
Publisher :	Kluwer Academic Publ
Volume :	10
Issue/season :	2
Pages :	69-77
Audience :	International
ISSN :	1022-9760
City :	Dordrecht
Abstract :	[en] The desorption behaviour of the diblock polyampholyte PMAA-b-PDMAEMA, poly(methacrylic acid)-block-poly ((dimethylamino)ethyl methacrylate), preadsorbed on silicon substrates was investigated under the influence of several desorption agents. The investigated polyampholyte is known to adsorb in regular structures directly from aqueous solutions onto silicon substrates. While the adsorption process is mainly determined by electrostatic interactions, two kinds of desorption mechanism should be assumed. The first mechanism is based on changed electrostatic conditions caused for instance by a strong change in pH of the aqueous solution. The other mechanism is observed after treatment with hydrophobic organic solvent, which leads to the desorption of hydrophobic adsorbed polyampholyte chains, while the electrostatically attached ones will not be influenced. To complete the desorption experiments with organic solvents also adsorption experiments from analogous polyampholytic solutions in the same organic solvents were performed. The amount of polymer at the substrate surface after adsorption or desorption experiments was determined using ellipsometry. Atomic force microscopy (AFM) was used to investigate the surface topography of dried samples after the desorption process.
Research units :	Center for Education and Research on Macromolecules (CERM)
Funders :	The DFG priority program “Polyelectrolyte” (grant IIC10-322 1009) ; Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fondation Européenne de la Science = European Science Foundation - (ESF) in the frame of the SUPERNET program
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/9120
DOI :	10.1023/A:1024930219686
Other URL :	http://www.springerlink.com/content/r22011l1604j2736/fulltext.pdf
Commentary :	The original publication is available at http://www.springerlink.com/content/r22011l1604j2736/fulltext.pdf. The authors acknowledge Journal of Polymer Research (Kluwer Academic Press) for allowing them to archive this paper.

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