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Tuning structural forces between silica surfaces by temperature-induced micellization of responsive block copolymers
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface and Corrosion Science.
MEMPHYS, Department of Physics and Chemistry, University of Southern Denmark.
2010 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 12, no 36, 10730-10735 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study is to demonstrate a method to control interactions between two surfaces by the use of a responsive solution. This was done by performing AFM-based force measurements between two silica surfaces immersed in an aqueous solution of thermo-responsive Pluronics P85 block copolymers. For this system we demonstrate that one can switch between a situation where no long-range forces are acting between the surfaces to a situation where a long-range structural force, oscillating between attractive and repulsive force regimes, is controlling the surface interaction. This shift in behavior is caused by a long-range order introduced by temperature-induced micellization of the block copolymers and is thus simply achieved by changing the temperature from below to above the micellization temperature. We propose that the use of micelle-forming responsive block copolymers is a general method for reversibly controlling surface interactions by a temperature switch. Since the force control is achieved by changes occurring in bulk solution, the nature of the surfaces is expected to play only a relative minor role.

Place, publisher, year, edition, pages
2010. Vol. 12, no 36, 10730-10735 p.
Keyword [en]
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-26691DOI: 10.1039/c004413jISI: 000281613300009ScopusID: 2-s2.0-77956327940OAI: diva2:373104
QC 20101130Available from: 2010-11-30 Created: 2010-11-26 Last updated: 2010-11-30Bibliographically approved

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Thormann, EsbenClaesson, Per M.
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