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Morphology, fluorescence properties, and their photothermal changes of poly(substituted thiophene) films revealed by near‐field fluorescence microspectroscopy
Author(s) -
Kurokawa N.,
Yoshikawa H.,
Masuhara H.,
Hirota N.,
Hyodo K.
Publication year - 2001
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.2001.00792.x
Subject(s) - fluorescence , thiophene , fluorescence microscope , morphology (biology) , optical microscope , resolution (logic) , materials science , microscopy , irradiation , analytical chemistry (journal) , polymer , conjugated system , fluorescence lifetime imaging microscopy , chemistry , photochemistry , optics , scanning electron microscope , chromatography , organic chemistry , physics , artificial intelligence , biology , computer science , nuclear physics , composite material , genetics
The morphology and fluorescence spectrum of poly{3‐[2‐(N‐dodecylcarbamoyloxy)ethyl]thiophene‐2,5‐diyl} film were examined with spatial resolution of 100 nm using near‐field fluorescence microspectroscopy. Fluorescence spectra observed at protruding domains were blue‐shifted compared with flat areas, and further blue‐shift was observed there more appreciably by long‐time irradiation via a near‐field scanning optical microscope probe. It is considered that the polymer chains at the protruding domains take disordered conformations, in which conjugated lengths are shorter and further disordering can be induced more easily by irradiation compared with those in the flat areas.