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Issue 37, 2012
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Patchy worm-like micelles: solution structure studied by small-angle neutron scattering

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Abstract

Triblock terpolymers exhibit a rich self-organization behavior including the formation of fascinating cylindrical core–shell structures with a phase separated corona. After crystallization-induced self-assembly of polystyrene-block-polyethylene-block-poly(methyl methacrylate) triblock terpolymers (abbreviated as SEMs = Styrene-Ethylene-Methacrylates) from solution, worm-like core–shell micelles with a patchy corona of polystyrene and poly(methyl methacrylate) were observed by transmission electron microscopy. However, the solution structure is still a matter of debate. Here, we present a method to distinguish in situ between a Janus-type (two faced) and a patchy (multiple compartments) configuration of the corona. To discriminate between both models the scattering intensity must be determined mainly by one corona compartment. Contrast variation in small-angle neutron scattering enables us to focus on one compartment of the worm-like micelles. The results validate the existence of the patchy structure also in solution.

Graphical abstract: Patchy worm-like micelles: solution structure studied by small-angle neutron scattering

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Article information


Submitted
17 Apr 2012
Accepted
20 Jul 2012
First published
25 Jul 2012

Phys. Chem. Chem. Phys., 2012,14, 12750-12756
Article type
Paper

Patchy worm-like micelles: solution structure studied by small-angle neutron scattering

S. Rosenfeldt, F. Lüdel, C. Schulreich, T. Hellweg, A. Radulescu, J. Schmelz, H. Schmalz and L. Harnau, Phys. Chem. Chem. Phys., 2012, 14, 12750
DOI: 10.1039/C2CP41231D

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