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CSA-doped PANI semiconductor nanofilms: synthesis and characterization

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Abstract

Camphorsulfonic acid doped polyaniline (PANI-CSA) prepared by chemical oxidative polymerization is dip coated on glass plates with three different PANI:CSA weight ratios (1:0.5, 1:1 and 1:2). Films of thickness being <100 nm are termed as nanofilms. Fourier transform infrared spectroscopy indicated the presence of dopant and increase in degree of polymerization with increase in dopant level. X-ray diffraction studies revealed the amorphous nature of the films. Scanning electron microscopy showed very smooth morphology without any crack or pores. Hall-effect analysis showed that the increase in CSA weight ratio appreciably increases the conductivity of PANI-CSA films due to increase in carrier concentration and it also represents the semiconductivity (P-type) nature in all the films. UV–visible absorption spectra and photoluminescence spectra revealed that high intense absorption and emission peaks occur for the PANI-CSA film with PANI:CSA weight ratio (1:2). This appreciable increase is due to increase in charge carriers. Photoluminescence study of PANI-CSA films excited using 300 nm shows high intense peaks at 361 and 494 nm and a weak peak at 410 nm which confirmed the semiconducting nature of the film.

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Authors and Affiliations

  1. Department of Physics, Jansons Institute of Technology, Coimbatore, India

    D. Geethalakshmi

  2. Department of Physics, Coimbatore Institute of Technology, Coimbatore, India

    N. Muthukumarasamy

  3. Department of Physics, PSG College of Technology, Coimbatore, India

    R. Balasundaraprabhu

Authors
  1. D. Geethalakshmi
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  2. N. Muthukumarasamy
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  3. R. Balasundaraprabhu
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Correspondence to D. Geethalakshmi.

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Geethalakshmi, D., Muthukumarasamy, N. & Balasundaraprabhu, R. CSA-doped PANI semiconductor nanofilms: synthesis and characterization. J Mater Sci: Mater Electron 26, 7797–7803 (2015). https://doi.org/10.1007/s10854-015-3427-z

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  • DOI: https://doi.org/10.1007/s10854-015-3427-z

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