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Formation of 1D Poly(3,4-ethylenedioxythiophene) Nanomaterials in Reverse Microemulsions and Their Application to Chemical Sensors

Authors

  • H. Yoon,

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56–1, Seoul 151–742, Korea
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  • M. Chang,

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56–1, Seoul 151–742, Korea
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  • J. Jang

    1. Hyperstructured Organic Materials Research Center and School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56–1, Seoul 151–742, Korea
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  • This work has been financially supported by the Brain Korea 21 program of the Korean Ministry of Education and the Hyperstructured Organic Materials Research Center supported by the Korean Science and Engineering Foundation.

Abstract

1D poly(3,4-ethylenedioxythiophene) (PEDOT) nanomaterials, including ellipsoidal nanoparticles, nanorods, and nanotubes, are fabricated via chemical oxidation polymerization in reverse (water-in-oil) microemulsions. The reverse cylindrical micelles are prepared with sodium bis(2-ethylhexyl) sulfosuccinate (AOT) and aqueous FeCl3 solution in hexane. The morphology of the final products is determined by carefully tuning the degree of oxidation potential at the micelle surface. Notably, the fabrication of gram-scale amounts of products is possible under optimized synthetic conditions, suggesting that this methodology is appropriate for the large-scale production of the corresponding nanomaterials. The as-prepared PEDOT nanomaterials are applied to the precise detection of alcohol vapors. The chemical sensors based on the PEDOT nanomaterials present excellent reversibility and reproducibility in response.

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