Structural investigation of thin diblock copolymer films using time-of-flight grazing-incidence small-angle neutron scattering
| Autor: | R. Kampmann, Gunar Kaune, U. van Bürck, Jean-François Moulin, Martin Haese-Seiller, Matthias A. Ruderer, Ezzeldin Metwalli, Peter Müller-Buschbaum, Markus Rauscher |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Substrate (electronics) Polymer Neutron scattering Small-angle neutron scattering General Biochemistry Genetics and Molecular Biology chemistry.chemical_compound chemistry Polymer chemistry Copolymer Lamellar structure Polystyrene Thin film Composite material |
| Zdroj: | Journal of Applied Crystallography. 44:84-92 |
| ISSN: | 0021-8898 |
| DOI: | 10.1107/s0021889810046194 |
| Popis: | The depth-dependent morphology of the microphase separation structure in thin block copolymer films is examined using non-destructive time-of-flight grazing-incidence small-angle neutron scattering. The structure of a cylinder-forming diblock copolymer, polystyrene(deuterated)-block-polyisoprene, in contact with either a low- or a high-energy substrate surface is investigated. A systematic identification of the components of the polymer film at different depths is achieved by utilizing the material characteristic Yoneda peak. For the polymer film attached to the low-surface-energy aminosilane-coated substrate, a morphology transition from lamellar at the substrate–polymer interface,viaperforated lamellar in the film bulk, to an ill-defined structure at the polymer–air interface is observed. This phase transition along the film normal is due to the competition between the surface-induced morphological changes and the stable cylindrical bulk morphology of the diblock copolymer. In contrast, on the high-energy surface no pronounced ordering is found for the applied conditions. |
| Databáze: | OpenAIRE |
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