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ZB 10 - Soft Condensed Matter (R. Holyst)

We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!

Publication

Self-Assembly at Different Length Scales: Polyphilic Star-Branched Liquid Crystals and Miktoarm Star Copolymers

Author(s): Ungar, Goran and Tschierske, Carsten and Abetz, Volker and Holyst, and Bates, Martin A. and Liu, Feng and Prehm, Marko and Kieffer, and Zeng, Xiangbing and Walker, Martin and Glettner, Benjamin and Zywocinski, Andrzej
Title: Self-Assembly at Different Length Scales: Polyphilic Star-Branched Liquid Crystals and Miktoarm Star Copolymers
Abstract: The diversity of phase morphologies observed recently in star-branched and polymeric compounds containing at least three segments is reviewed. Bolaamphiphiles and facial amphiphiles rodlike aromatic cores, two end-groups, and one (T-shape) or two chains attached laterally to the core, form numerous liquid-crystal phases, as well as a variety of novel and 3D-ordered mesophases. Molecular self-organization is in bulk phases and in thin films on solid and liquid surfaces, well as in Langmuir-Blodgett films. The remarkably reversible of mono-and trilayer films is highlighted. In the bulk, rod-coil''} molecules without appended end-groups form lamellar phases if the core is a straight rod, but the variety forms hexagonal honeycombs. Furthermore, self-assembly Janus''}-type molecules, is discussed. Also covered is the of morphologies observed in miktoarm star terpolymers, i.e., with three different and incompatible arms of well defined Similarities and differences are highlighted between the morphologies on the 3-15 nm scale and the polymer on the scale of 10-100 nm. A separate section is dedicated computer simulations of such systems, particularly those using particle and molecular dynamics. Of special interest are the synthesised X-shaped tetraphilic molecules, where two different incompatible side-chains are attached at opposite sides of the core. The tendency for their phase separation produces honeycombs with cells of different compositions that can represented as a plane paved with different colored tiles. The variation of chain length and color''} creates the for developing a considerable range of complex new 2D and 3D nanostructures. Analogous X-shaped rod-coil compounds with unequal groups are also of considerable interest, forming tubular lyotropic structures capable of confining strings of guest molecules.
Pages: 1296-1323
Journal: ADVANCED FUNCTIONAL MATERIALS
Volume: 21
ID: ISI:000289209700007
Year: 2011
DOI: 10.1002/adfm.201002091