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Multiscale Scanning Tunneling Microscopy Study of Self‐Assembly Phenomena in Two‐Dimensional Polycrystals of π‐Conjugated Polymers: The Case of Regioregular Poly(dioctylbithiophene‐ alt ‐fluorenone)
Author(s) -
Brun M.,
Demadrille R.,
Rannou P.,
Pron A.,
Travers J.P.,
Grévin B.
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.200400088
Subject(s) - conjugated system , materials science , fluorenone , scanning tunneling microscope , polymer , copolymer , nanoscopic scale , self assembly , polymer chemistry , nanostructure , nanotechnology , crystallography , composite material , fluorene , chemistry
A regioregular π‐conjugated alternating copolymer that contains fluorenone and bithiophene subunits forms self‐organized polycrystals with meso‐ and nanoscopic structural features is imaged by low‐current scanning tunneling microscopy. Unlike conjugated polymers lacking the fluorenone subunit (Figure, left), the rigidity of the copolymer discourages chain folding and results in “fold‐free” monodomains (right).