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Personen: Tsarkova, L. (Autor) 
Knoll, A. (Autor) 
Krausch, Georg (Autor) 
Magerle, R. (Autor) 
Titel: Substrate-induced phase transitions in thin films of cylinder-forming diblock copolymer melts
Quelle: Macromolecules. Bd. 39. H. 10. Washington, D.C. : American Chemical Soc. S. 3608 - 3615
Erscheinungsjahr:    2006
ISBN / ISSN: 0024-9297
URL der Originalveröffentlichung doi:10.1021/ma060224n
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:   
Einrichtung: Universitätsleitung
DDC-Sachgruppe:    Physik
ID: 11475  Universitätsbibliothek Mainz
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Abstract: Terrace formation and morphological behavior in thin films of polystyrene-block-polybutadiene block copolymer have been studied on two chemically different substrates by means of scanning force microscopy. Cylinders parallel to the film plane (C-parallel to) are found on weakly interacting substrates in up to five-layer-thick films. A bottom layer of half cylinders is stabilized at the substrate. On strongly interacting substrates, the development of the C-parallel to microdomains and nonbulk perforated lamella (PL) and lamella ( L) phases depends on the local film thickness. The sequence of structures at transition thickness ( in between the steps) suggests a few percent increase of the characteristic microdomain spacing in the order C-parallel to-PL-L. Comparison of the interlayer distances on the two types of substrates points to lamella-like structures in bulk of the films on strongly interacting surfaces.
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