Our research currently focuses on an interdisciplinary approach to ''soft materials'', with emphasis on the study of block copolymers, ranging from synthetic aspects of polymer science all the way to the physics of complex fluids under shear flow. With our recent effort to obtain silica-type materials from block copolymer mesophases we bridge the gap between polymers and ceramics opening up a fascinating research area with potential applications ranging all the way from the life sciences to microelectronics. Our current research activities are summarized as follows:
Synthesis and characterization of model *,*- macrozwitterionic block copolymers
Investigation of the self-assembly of these model macromolecular surfactants in the bulk as well as in solution
Order and dynamics of complex block copolymer fluids under shear flow
Diblock copolymers as structure directing agents for silica-type mesostructures
mesoporous materials obtained from block copolymer directed silica synthesis
nano-objects of controlled shape, size and composition from hybrid mesophases
ion conductivity of organic-inorganic hybrid materials
Funding
Since part of the research effort is conducted at the Max-Planck-Institute for Polymer Science in Mainz, Germany, funding comes from German as well as American sources, some of which are: German Science Foundation (DFG), Max-Planck-Society (MPG), BASF Germany, NSF, New York State Center for Advanced Technology (CAT).
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P.F.W. Simon, R. Ulrich, H.W. Spiess, U. Wiesner, Review: Block
Copolymer - Ceramic Hybrid Materials From Organically Modified
Silicon Precursors, Chem. Mater. 2001, 13,
3464.
G. Floudas, B. Vazaiou, F. Schipper, R. Ulrich, U. Wiesner,
H. Iatrou, N. Hadjichristidis, Poly(ethylene oxide-b-isoprene)
Diblock Copolymer Phase Diagram, Macromolecules 34, 2001,
2947.
A.C. Finnefrock, R. Ulrich, A. Du Chesne, C.C. Honeker, K.
Schumacher, K.K. Unger, S.M. Gruner, U. Wiesner, Metal-Oxide-Containing
Mesoporous Silica With Bicontinuous Plumber's Nightmare Morphology
From a Block Copolymer-Hybrid Mesophase, Angew Chem. Int. Ed.
2001, 40, 1208; Agnew. Chem. 2001, 113,
1248.
G. Floudas, R. Ulrich, U. Wiesner, B. Chu, Nucleation and Growth
in Order-to-Order Transitions of a Block Copolymer, Europhys.
Lett. 2000, 50, 182.
R. Ulrich, A. Du Chesne, M. Templin, U. Wiesner, Nano-Objects
With Controlled Shape, Size and Composition From Block Copolymer
Mesophases, Adv. Mater. 1999, 11, 141.
V. SchSdler, P. Lindner, U. Wiesner, E. Mendes, Ionic and Zwitterionic
Model Macromolecular Surfactants, J. Phys. Chem. B 1998,
102, 7316.
V. SchSdler, V. Kniese, T. Thurn-Ahlbrecht, U. Wiesner, H.W.
Spiess, Self-Assembly of Ionically End-Capped Diblock Copolymers,
Macromolecules 1998, 31, 4828.
U. Wiesner, Feature Article: Block Copolymers Under Large Amplitude
Oscillatory Shear Flow: Order and Dynamics, Macromol. Chem.
Phys. 1997, 198, 3319.
M. Templin, A. Franck, A. Du Chesne, H. Leist, Y. Zhang, R.
Ulrich, V. SchSdler, U. Wiesner, Organically Modified Aluminosilicate
Mesostructures From Block Copolymer Phases, Science 1997,
278, 1795.
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