Tuning structural forces between silica surfaces by temperature-induced micellization of responsive block copolymers
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
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.
ANGLE NEUTRON-SCATTERING, TRIBLOCK COPOLYMER, AQUEOUS-SOLUTION, DEPENDENT INTERACTIONS, HYDROPHOBIC SURFACES, PHASE-BEHAVIOR, POLOXAMER, WATER, CALIBRATION, MICELLES
IdentifiersURN: urn:nbn:se:kth:diva-26691DOI: 10.1039/c004413jISI: 000281613300009ScopusID: 2-s2.0-77956327940OAI: oai:DiVA.org:kth-26691DiVA: diva2:373104
QC 201011302010-11-302010-11-262010-11-30Bibliographically approved