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Personen: Geoghegan, Mark (Autor) 
Wang, Chun (Autor) 
Rehse, Nicolaus (Autor) 
Magerle, Robert (Autor) 
Krausch, Georg (Autor) 
Titel: Thin polymer films on chemically patterned, corrugated substrates
Quelle: Journal of physics : condensed matter. Bd. 17. H. 9. Bristol : IOP Publ. S. 389 - 402
Erscheinungsjahr:    2005
ISBN / ISSN: 0953-8984
URL der Originalveröffentlichung doi:10.1088/0953-8984/17/9/007
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:   
Einrichtung: Universitätsleitung
DDC-Sachgruppe:    Physik
ID: 11481  Universitätsbibliothek Mainz
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Abstract: We study the effect of a chemical pattern on the wetting and dewetting behaviour of thin polystyrene (PS) films on regularly corrugated silicon substrates. Our results reveal that the film preparation, annealing method, and confinement play a critical role in the final film structure. On evaporating gold on both sides of the facets (such that it covered the crests of the facets, and not the troughs), we observed dewetting, which proceeded to the gold, demonstrating an enthalpic effect contrary to the outcome previously observed when gold was only evaporated on one side of the facet. We also coated the substrate with octadecyltrichlorosilane (OTS); this led to a gold and OTS striped structure. PS films several nanometres thick dewet such substrates, with a preferential direction for dewetting in the direction of the stripes forming droplets of a considerably larger size than the stripes.
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