Journal of Electronic Materials

, Volume 47, Issue 10, pp 6036–6041 | Cite as

Electrochemical Measurements of a Conducting Polymer for Optimizing Detector Applications

  • Hamida H. Hamid
  • A. M. Elshaer
  • Mohamed E. HarbEmail author
  • Sh. Ebrahim
  • Moataz M. Soliman


An electrochemical method was used to prepare polyaniline (PANI) with hydrochloric acid as a dopant. This electroactive material was fabricated using electrically modified carbon coated Teflon electrodes with an area of 0.64 cm2 in 1 M HCl. PANI was electrochemically synthesized using cyclic voltammetry (CV) with a variable number of cycles, scan rates, and step sizes at potentials ranging from − 0.2 V to 0.8 V. Fabricated samples were tested using different electrochemical techniques including CV, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). The DPV and EIS measurements indicate a linear relationship between both the current peak and the charge transfer resistance (Rct) and pH. These measurements showed that the prepared electrochemical device can be used as a sensor for pH. Optimum preparation parameters were 30 cycles, 50 mV/s scan rate and 2 mV step size. A linear relationship between oxidation current and pH of the solution with a correlation coefficient of 0.97 in the range of 1–5 makes PANI a candidate to be used as a pH sensor.


Polyaniline cyclic voltammetry differential pulse voltammetry electrodeposition pH sensor 


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Hamida H. Hamid
    • 1
  • A. M. Elshaer
    • 2
  • Mohamed E. Harb
    • 3
    Email author
  • Sh. Ebrahim
    • 1
  • Moataz M. Soliman
    • 1
  1. 1.Department of Materials Science, Institute of Graduate Studies and ResearchAlexandria UniversityAlexandriaEgypt
  2. 2.Department of Computer EngineeringHigher Institute of Engineering and TechnologyEl-BoheiraEgypt
  3. 3.Department of Electronics and Communication EngineeringHigher Institute of Engineering and Technology, K-MarriottAlexandriaEgypt

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