Epitaxial Growth of Highly Oriented Fibers of Semiconducting Polymers with a Shish-Kebab-Like Superstructure - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Advanced Functional Materials Année : 2009

Epitaxial Growth of Highly Oriented Fibers of Semiconducting Polymers with a Shish-Kebab-Like Superstructure

Résumé

Highly oriented fibers of regioregular poly(3-alkylthiophene)s (P3ATs) showing a ldquoshish-kebabrdquo morphology are prepared by oriented epitaxial crystallization in a mixture of 1,3,5-trichlorobenzene (TCB) and pyridine. The superstructure of the P3AT fibers consists of an oriented thread-like core several hundreds of micrometers long, the ldquoshishrdquo, onto which lateral crystalline fibrils made of folded polymer chains, the ldquokebabsrdquo, are connected in a periodic way with a periodicity in the range 18-30†nm. The P3AT-chain axis is oriented parallel to the fiber axis whereas the pi-stacking direction is oriented perpendicular to it. The oriented character of the shish-kebab fibers results in polarized optical absorption and photoluminescence. The formation of oriented precursors by epitaxial orientation of polymer chains onto long needles of a molecular crystal†-†TCB in the present case†-†appears to be an original alternative to the crystallization usually performed under external flow conditions.
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Dates et versions

hal-00429961 , version 1 (05-11-2009)

Identifiants

Citer

Martin Brinkmann, Frédéric Chandezon, Robert Bernard Pansu, Carine Julien. Epitaxial Growth of Highly Oriented Fibers of Semiconducting Polymers with a Shish-Kebab-Like Superstructure. Advanced Functional Materials, 2009, 19 (17), pp.2759-2766. ⟨10.1002/adfm.200900966⟩. ⟨hal-00429961⟩
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