Salt-regulated attraction and repulsion of spherical polyelectrolyte brushes towards polyelectrolyte multilayers

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00004776
URN to cite this document: urn:nbn:de:bvb:703-epub-4776-0

Title data

Hanske, Christoph ; Schneider, Christian ; Drechsler, Markus ; Wittemann, Alexander ; Fery, Andreas:
Salt-regulated attraction and repulsion of spherical polyelectrolyte brushes towards polyelectrolyte multilayers.
In: Physical Chemistry Chemical Physics. Vol. 14 (2012) Issue 12 . - pp. 4196-4203.
ISSN 1463-9076
DOI der Verlagsversion: https://doi.org/10.1039/c2cp23408d

Format: PDF Name: c2cp23408d.pdf Version: Published Version Available under License German copyright law. This contribution is freely accessible with the consent of the copyright holder on the basis of an (DFG-funded) alliance or national license. The document may be used free of charge for personal use. In addition, the reproduction, editing, distribution and any kind of exploitation require the written consent of the respective rights holder.

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Project information

Project title:	Project's official title Project's id Von partikulären Nanosystemen zur Mesotechnologie SFB840
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

Adsorption of colloidal particles presents an interesting alternative to the modification of surfaces using covalent coupling or physisorption of molecules. However, to tailor the properties of these materials full control over the effective particle-substrate interactions is required. We present a systematic investigation of the adsorption of spherical polyelectrolyte brushes (SPB) onto polyelectrolyte multilayers (PEM). A brush layer grafted from colloidal particles allows the incorporation of various functional moieties as well as the precise adjustment of their adsorption behaviour. In the presence of oppositely charged surfaces the amount of adsorbed SPB monotonically increases with the ionic strength, whereas equally charged substrates efficiently prevent colloidal attachment below a threshold salt concentration. We found that the transition from the osmotic to the salted brush regime at approximately 100 mM coincided with a complete loss of substrate selectivity. In this regime of high ionic strength, attractive secondary interactions become dominant over electrosteric repulsion. Due to the soft polyelectrolyte corona a surface coverage exceeding the theoretical jamming limit could be realized. Both the adsorption kinetics and the resulting thin film morphologies are discussed. Our study opens avenues for the production of two-dimensional arrays and three-dimensional multilayered structures of SPB particles.

Further data

Item Type:	Article in a journal
Additional notes (visible to public):	ISI:000300946600020
DDC Subjects:	500 Science > 500 Natural sciences 500 Science > 530 Physics 500 Science > 540 Chemistry
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II - Interfaces and Nanoanalytics 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 Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-4776-0
Date Deposited:	07 Sep 2020 09:50
Last Modified:	07 Sep 2020 09:50
URI:	https://epub.uni-bayreuth.de/id/eprint/4776

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