Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 29, Issue 9, Pages 724-728Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200800022
Keywords
composites; dielectric properties; ferroelectricity; nanotubes; semiconductors
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To fabricate ferroelectric ultrathin polymer films with large dielectric constants for potential all-organic electronic devices, ferroelectric polymer nanotubes and a composite of the nanotubes with a dispersed organic semiconductor have been fabricated by template-assisted methods. The ferroelectricity drops markedly in spin-coated ultrathin films less than 100 nm thick, whereas P(VDF-TrFE) nanotubes with a wall thickness of a few ten nm sustain ferroelectricity. The composite nanotubes exhibit a giant dielectric constant as a result of significantly enhanced interface polarization between the nanosized fillers and the polymer matrix. They could be of practical use in supercapacitors, optoelectronic devices, and sensors.
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