This title appears in the Scientific Report : 2003 

Isotropic to Nematic Transition in Solutions of Cylindrical PB-PEO Block Copolymer Micelles Close to Wall
Lang, P.
Willner, L. / Pyckhout-Hintzen, W. / Krastev, R.
Weiche Materie; IFF-WM
Neutronenstreuung; IFF-NST
Langmuir, 19 (2003) S. 7597 - 7603
Washington, DC ACS Publ. 2003
7597 - 7603
10.1021/la034356a
Journal Article
Kondensierte Materie
Langmuir 19
J
Get full text
OpenAccess
Please use the identifier: http://hdl.handle.net/2128/1285 in citations.
Please use the identifier: http://hdl.handle.net/2128/568 in citations.
Please use the identifier: http://dx.doi.org/10.1021/la034356a in citations.
The influence of a flat interface on the isotropic to nematic (I/N) phase transition was investigated for aqueous solutions of cylindrical micelles of polybutadiene-poly(ethylene oxide) block copolymers using specular neutron reflectivity. While the I/N transition in the bulk occurs at the solute volume fraction phi(N/I), we observed the formation of a condensed layer close to a silicon single-crystal interface at volume fractions of about phi(i) approximate to 0.85phi(I/N). The thickness of this layer does not vary if the solute fraction is changed, while its density increases drastically within a very narrow range of volume fractions. This observation is interpreted as the formation of a nematically ordered layer which is induced by the interface.