Journal Article

PreJuSER-22532

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Patchy worm-like micelles: solution structure studied by small-angle neutron scattering

Rosenfeldt, S. ; Lüdel, F. ; Schulreich, C. ; Hellweg, T. ; Radulescu, A.FZJ* ; Schmelz, J. ; Schmalz, H. ; Harnau, L.

2012
RSC Publ. Cambridge

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Please use a persistent id in citations: http://hdl.handle.net/2128/7556  doi:10.1039/C2CP41231D

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.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Key Technologies (1st) ; Soft Condensed Matter (2nd) ; J

Note: This work was supported by the German Science Foundation (Collaborative Research Center 840, project A2). We thank the Julich Center of Neutron Scattering (JCNS, Germany) for financial travel support and for providing beamtime at the KWS 1 instrument at FRM II in Munich, Germany.

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
3. Neutronenstreuung (JCNS-1)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (FUEK505) (FUEK505)
2. 544 - In-house Research with PNI (POF2-544) (POF2-544)

Experiment(s):

1. KWS-1: Small angle scattering diffractometer (NL3b)

Appears in the scientific report 2012

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Database coverage:
; ; Allianz-Lizenz / DFG ; Current Contents - Social and Behavioral Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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