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Selective enhancement of intra-chain charge transport to improve ammonia sensing performance in polyaniline layers

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Abstract

Polyaniline (PAni) is a p-type conductive polymer and its conductivity decreases upon exposure to ammonia. Ammonia molecules affect the intra-chain charge transfer process. The inter-chain resistance is higher than the intra-chain resistance. Thus, the ammonia sensing performance is highly attenuated by the influence of inter-chain resistance. Here, we report a facile method for the selective enhancement of the intra-chain charge transport process in a PAni film. The use of a good solvent such as toluene is demonstrated to increase the PAni molecular length, to reduce the inter-chain transitions, and to improve the ammonia sensing performance of the PAni film.

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Authors and Affiliations

  1. Department of Electrical Engineering, College of Electrical and Computer Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, 6351966159, Iran

    Pejman Shabani & Akram Qarehbaqi

  2. Electronic Materials Laboratory, Electrical Engineering Department, K. N. Toosi University of Technology, Tehran, 16315-1355, Iran

    Farhad Akbari Boroumand

Authors
  1. Pejman Shabani
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  2. Akram Qarehbaqi
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  3. Farhad Akbari Boroumand
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Correspondence to Pejman Shabani.

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Shabani, P., Qarehbaqi, A. & Boroumand, F.A. Selective enhancement of intra-chain charge transport to improve ammonia sensing performance in polyaniline layers. Electron. Mater. Lett. 12, 107–112 (2016). https://doi.org/10.1007/s13391-015-5226-3

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  • DOI: https://doi.org/10.1007/s13391-015-5226-3

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