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Surface morphology and phase behavior of flexible polymer in fluid liquid crystal monolayers

Title data

Ibn-Elhaj, M. ; Ouali, Lahoussine ; Papastavrou, Georg ; Möhwald, Helmuth:
Surface morphology and phase behavior of flexible polymer in fluid liquid crystal monolayers.
In: Langmuir. Vol. 15 (January 1999) Issue 4 . - pp. 1528-1533.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la981175d

Official URL: Volltext

Abstract in another language

Using the Langmuir-Blodgett technique, X-ray reflectivity, and atomic force microscopy, we investigate the phase behavior, structure, and morphology of a flexible polymer with surface-active repeat units embedded in a two-dimensional Liquid crystal fluid. Depending on the lateral pressure and the polymer concentration, one observes complete miscibility, partial miscibility, or complete phase separation of polymer and liquid crystal. At low polymer concentration (or low lateral pressure), isolated polymer chains are laterally anchored onto the water surface. The polymer is uniformly incorporated into the layers, without destroying the liquid crystalline ordering, and increases their stability. At higher concentrations, a transition is generated by simply increasing the surface pressure, where the polymer configuration switches from planar to form "pancakes" in contact, yielding patterns of polymer in the liquid crystalline matrix. By transferring the films to a solid support and removing the Liquid crystal, it is then possible to create nanoscopic polymer domains consisting of one to several isolated polymer chains on the solid substrate.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 13 Sep 2017 09:33
Last Modified: 13 Sep 2017 09:33
URI: https://eref.uni-bayreuth.de/id/eprint/39597