Journal Article

PreJuSER-31340

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Isotropic to Nematic Transition in Solutions of Cylindrical PB-PEO Block Copolymer Micelles Close to Wall

Lang, P.FZJ* ; Willner, L.FZJ* ; Pyckhout-Hintzen, W.FZJ* ; Krastev, R.

2003
ACS Publ. Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/568  http://hdl.handle.net/2128/1285  doi:10.1021/la034356a

Abstract: 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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Weiche Materie (IFF-WM)
2. Neutronenstreuung (IFF-NST)

Research Program(s):

1. Kondensierte Materie (M02)

Appears in the scientific report 2003

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Database coverage:

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