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Nanowires of tetracene dicarboxylic imide disulfide with an N-hexyl substituent (HexylTIDS) were successfully constructed in composite thin film containing poly(3-hexylthiophene) (P3HT). The nanowire structures were investigated by atomic force microscopy and scanning electron microscopy. The photoconductivity of the composite films was evaluated by time-resolved microwave conductivity measurements, revealing that the film containing a 1:1 w/w ratio of HexylTIDS and P3HT exhibited the highest photoconductivity (2.1 × 10(-7) m(2)/(V s)). The intermolecular interactions of HexylTIDS molecules were important in nanowire formation. These results suggest a one-step method for fabricating small-molecule-based nanowires in composite films from a blended solution. This type of composite film, and its fabrication method, will be useful for developing organic thin-film photoelectronic devices.

Citation

Tsuyoshi Suzuki, Toshihiro Okamoto, Akinori Saeki, Shu Seki, Hiroyasu Sato, Yutaka Matsuo. Formation of photoconductive nanowires of tetracene derivative in composite thin film. ACS applied materials & interfaces. 2013 Mar;5(6):1937-42

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PMID: 23438387

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