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Attractive electrostatic forces between identical colloidal particles induced by adsorbed polyelectrolytes

Title data

Popa, Ionel ; Gillies, Graeme ; Papastavrou, Georg ; Borkovec, Michal:
Attractive electrostatic forces between identical colloidal particles induced by adsorbed polyelectrolytes.
In: The Journal of Physical Chemistry B. Vol. 113 (June 2009) Issue 25 . - pp. 8458-8461.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp904041k

Official URL: Volltext

Abstract in another language

Polyelectrolytes adsorb strongly at oppositely charged surfaces, thereby dramatically influencing the corresponding interaction forces. In this letter, we report on direct force measurements with the atomic force microscope (AFM) between two individual particles in an aqueous colloidal suspension in the presence of polyelectrolytes near the isoelectric point. From systematic variations of the molecular mass, the ionic strength, and analysis of adhesion events, we conclude that the observed attractive forces are mainly due to electrostatic patch-charge interactions. The same type of attractive forces is equally influencing interactions between proteins as well as hydrophobic or mineral surfaces.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: 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 > 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 > 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 > 540 Chemistry
Date Deposited: 12 Sep 2017 10:58
Last Modified: 12 Sep 2017 10:58
URI: https://eref.uni-bayreuth.de/id/eprint/39568