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Confinement Effects on the Optical Properties and Chain Conformations of Poly(9,9‐di‐ n ‐octylfluorene‐ alt ‐benzothiadiazole) Nanotubes
Author(s) -
Chu ChienWei,
Jeng KaiSheng,
Chi MuHuan,
Tsai ChiaChan,
Cheng MingHsiang,
Chen JiunTai
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600178
Subject(s) - materials science , raman spectroscopy , polymer , conjugated system , crystallinity , photoluminescence , scanning electron microscope , nanostructure , transmission electron microscopy , nanotechnology , chemical engineering , polymer chemistry , optoelectronics , optics , composite material , physics , engineering
Although many fabrication methods of conjugated polymer nanostructures have been developed, the effects of confinement on the morphologies, chain conformations, and optical properties of conjugated polymers are still not well understood. In this work, poly(9,9‐di‐ n ‐octylfluorene‐ alt ‐benzothiadiazole) (F8BT), a light‐emitting conjugated polymer, is used to fabricate nanotubes by a solution wetting method using anodic aluminum oxide templates. The property changes under the nanoscale confinement have been investigated. The morphologies of F8BT nanostructures are characterized by scanning electron microscope, transmission electron microscope, and laser scanning confocal microscope. The data show the hollow morphologies and no or low crystallinity of the nanostructures. The optical properties are also measured using UV–vis absorption, photoluminescence, and confocal Raman spectroscopy. The spectroscopy data indicate that F8BT polymer chains have less intermolecular interactions and coplanarity under the confinement effect.