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Enhancement in the Orientation of the Microdomain in Block Copolymer Thin Films upon the Addition of Homopolymer
Author(s) -
Jeong U.,
Ryu D. Y.,
Kho D. H.,
Kim J. K.,
Goldbach J. T.,
Kim D. H.,
Russell T. P.
Publication year - 2004
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200306113
Subject(s) - lipid microdomain , materials science , copolymer , methyl methacrylate , polystyrene , thin film , methacrylate , orientation (vector space) , composite material , polymer chemistry , polymer , nanotechnology , genetics , membrane , biology , geometry , mathematics
Cylindrical microdomains in thin films of mixtures of polystyrene‐ block ‐ poly(methyl methacrylate) and poly(methyl methacrylate) (PMMA) homopolymer are oriented normal to the film surface (see Figure). Confining the PMMA homopolymer to the microdomains increases the persistence of microdomain orientation over large distances; thus, aspect ratios up to ∼10 are achievable without the use of an external field.