Advanced Materials · 2001 · 852 citations · 0 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer MaterialsThin FilmsPolymer MorphologyPolymer PhysicsPolymer StructurePolymer SurfacesPolymer Thin FilmsThin-film MaterialsBlock Copolymer MorphologyBlock Copolymer SynthesisBlock Copolymer Thin FilmsEpitaxial Film GrowthFilm MorphologyLong-range OrderThin-film Morphology
The long-range order of spherical block copolymer films is greatly improved if the underlying surface has been etched to form wells and mesas. Epitaxial growth of polystyrene/poly(2-vinylpyridine) block copolymers on SiO2 with structures 1–10 μm wide yields single-crystal-like structures on top of the mesas (see Figure), and in the wells, provided the height of the mesas exceeds one layer of copolymer spheres (27 nm). (See also inside front cover.)