Journal of Applied Electrochemistry

, Volume 49, Issue 2, pp 179–194 | Cite as

Poly(aniline-co-o-anisidine)/graphene oxide Au nanocomposites for dopamine electrochemical sensing application

  • Aisha A. GanashEmail author
  • Sara A. Alqarni
  • Mahmoud A. HusseinEmail author
Research Article
Part of the following topical collections:
  1. Sensors


We describe here the manufacture of poly(aniline-co-o-anisidine)/graphene oxide nanocomposites, with the common abbreviation [PANI-co-PoAN/GO1−5], by the well-known in situ oxidative polymerization method with ultrasonic assistance. FE-SEM and TEM micrographs were utilized to examine the morphological characteristics of the composite materials. Moreover, FT-IR, XRD, TGA, and electrical conductivity measurements were used to investigate their complete performance. All the composites had almost equal final copolymer decomposition temperatures, which were in the range of 609.3–663.8 °C. Our essential objective is to study the electro selective application using gold nanoparticles (AuNPs) as a coating. Dopamine (DA) electrochemical sensor based on [AuNPs/PANI-co-PoAN/GO] nanocomposite covalently modified gold electrode was modified by an electroabsorption technique. The electrochemical behavior of the modified electrode towards the oxidation of DA was studied by square wave voltammetry (SWV) and cyclic voltammetry (CV) in pH 5.0 phosphate buffer solution. The sensor developed a current response to the oxidation of DA. Using SWV, the electrochemical sensor gave a linear relationship to DA in the concentration range of 5–100 µM with a limit of detection of 0.0334 µM. The modified electrode was highly stable, sensitive, and selective.

Graphical abstract


Polyaniline Poly-o-anisidine Dopamine detection Electrochemical Sensor application Graphene oxide 



This article contains the results and findings of a research project funded by King Abdulaziz City for Science and Technology (KACST) Grant No. PS-38-27.


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Chemistry Department, Faculty of ScienceKing Abdulaziz UniversityJeddahSaudi Arabia
  2. 2.Polymer Chemistry Lab, Chemistry Department, Faculty of ScienceAssiut UniversityAssiutEgypt

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