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Polymeric One-Dimensional Reflectors Based on Self-Organization of Comb-Shaped Supramolecules

Published online by Cambridge University Press:  10 February 2011

Harri Kosonen ,
Sami Valkama ,
Janne Ruokolainen ,
Gerrit ten Brinke  and
Olli Ikkala
Harri Kosonen
Affiliation:
Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland; VTT Microelectronics, Technical Research Centre of Finland, P.O. Box 1208, FIN-02044 VTT, Finland;
Sami Valkama
Affiliation:
Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland;
Janne Ruokolainen
Affiliation:
Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland;
Gerrit ten Brinke
Affiliation:
Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland; Laboratory of Polymer Chemistry, Dutch Polymer Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
Olli Ikkala
Affiliation:
Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland;
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Abstract

Polystyrene-block-poly(4-vinylpyridine) (PS-block-P4VP) diblock copolymer was complexed with dodecylbenzenesulfonic acid (DBSA), leading to comb-coil polymeric supramolecules PS-block-P4VP(DBSA)y (y = 1.0, 1.5, and 2.0). Complexes formed hierarchical lamellar structure with long period of ca. 1400 Å. Due to periodicity and refractive index contrast between the layers, transmission and reflectance measurements showed a relatively narrow incomplete bandgap at ca. 460 nm. The angular dependence of the bandgap was also studied using different angles (ø) relative to the surface normal. The mid-gap was blue-shifted when the incident angle was increased indicating that the lamellar structure was partly oriented by the surfaces of quartz glasses.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 775: Symposium P – Self-Assembled Nanostructured Materials , 2003 , P6.18
Copyright
Copyright © Materials Research Society 2003

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