Berlin 2001 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 18: Poster: Polymer Blends, Heterogeneous Systems, Colloids and Nanoparticles, Interfaces, Polyelectrolytes
CPP 18.14: Poster
Wednesday, April 4, 2001, 12:30–15:00, AT1
Janus Micelles — •Heiko Zettl1, Rainer Erhardt2, Alexander Böker2, Hakon Kaya3, Wim Pyckhout-Hintzen3, Georg Krausch1, Volker Abetz2, and Axel H. E. Müller2 — 1Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth — 2Makromolekulare Chemie II, Universität Bayreuth, 95440 Bayreuth — 3Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich
A novel strategy to synthesize amphiphilic surface-compartmentalized nanoparticles based on linear ABC triblock copolymers is presented. These so-called Janus micelles consist of a crosslinked core and a corona with a No-dqnorthernNo-dq and a "southernNo-dq hemisphere. Selectively crosslinking spherical domains of the polybutadien middle block in a well-ordered bulk morphology of a polystyrene-block-polybutadien-block-poly(methyl methacrylate) triblock copolymer leads to the conservation of the compartmentalization of the outer blocks after dissolution of the material. Multi-angle laser light scattering gel permeation chromatography, fluorescence correlation spectroscopy, small angle neutron scattering, static and dynamic light scattering, as well as scanning force microscopy indicate the existence of an equilibrium between molecularly dissolved Janus micelles (unimers) and aggregates (multimers), so-called supermicelles.