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Substrate‐induced lateral micro‐phase separation of a diblock copolymer
Author(s) -
Spatz Joachim P.,
Sheiko Sergei,
Möller Martin
Publication year - 1996
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.19960080614
Subject(s) - materials science , copolymer , polystyrene , substrate (aquarium) , phase (matter) , macromolecule , surface (topology) , chemical engineering , polymer chemistry , chemical physics , nanotechnology , polymer , composite material , organic chemistry , chemistry , biochemistry , oceanography , geometry , mathematics , engineering , geology
“Ultra‐monomolecular” films of block copolymers , i.e., films whose surface concentration is so low that the substrate cannot be covered homogeneously without affecting the structure of the macromolecules very strongly, have been studied using tapping‐ and friction‐mode SFM. Two‐dimensional phase separation yielding an ordered pattern of polystyrene and poly‐2‐vinylpyridine surface domains is observed. SFM is shown to distinguish topological features and also to discriminate between chemically different components. The surface features generated and the formation mechanisms involved are discussed.