Sensitive and selective dopamine sensor based on novel conjugated polymer decorated with gold nanoparticles

Emad A. Khudaish, Fakhra Al-Nofli, Jahangir Ahmad Rather, Mohammed Al-Hinaai, Karthik Laxman, Htet Htet Kyaw, Salim Al-Harthy

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

A novel surface material was fabricated for the first time at a glassy carbon electrode based on electrochemical polymerization of poly(2,4,6-triaminopyrmidine) (PTAP) decorated with gold nanoparticles (AuNPs). A schematic reaction mechanism was proposed to account for the aggregation of the polymer. The electrochemical performance and surface characterization were achieved employing cyclic voltammetry (CV), differential pulse voltammetry (DPV), electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), atomic force microspectroscopy (AFM) and energy dispersive system (EDS). Synergistic effects of the composite hybrid of PTAP and AuNPs promote the catalytic efficiency of the developed (AuNPs-PTAP/GCE) sensor for the electrochemical detection of dopamine (DA). The sensor showed an excellent selectivity for DA quantification with a detection limit of 0.017 μM in electrolytic medium composed of large amounts of ascorbic acid (AA) and uric acid (UA). The sensor was also applied for DA detection in real samples with satisfactory coverage.

Original languageEnglish
Pages (from-to)80-88
Number of pages9
JournalJournal of Electroanalytical Chemistry
Volume761
DOIs
Publication statusPublished - Jan 15 2016

Fingerprint

Conjugated polymers
Gold
Dopamine
Nanoparticles
Sensors
Electropolymerization
Ascorbic acid
Glassy carbon
Schematic diagrams
Voltammetry
Uric Acid
Electrochemical impedance spectroscopy
Ascorbic Acid
Cyclic voltammetry
Polymers
Agglomeration
X ray photoelectron spectroscopy
Electrodes
Acids
Composite materials

Keywords

  • 2,4,6-Triaminopyrmidine
  • Dopamine
  • Electropolyemrization
  • Gold nanoparticles
  • Sensors

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Sensitive and selective dopamine sensor based on novel conjugated polymer decorated with gold nanoparticles. / Khudaish, Emad A.; Al-Nofli, Fakhra; Rather, Jahangir Ahmad; Al-Hinaai, Mohammed; Laxman, Karthik; Kyaw, Htet Htet; Al-Harthy, Salim.

In: Journal of Electroanalytical Chemistry, Vol. 761, 15.01.2016, p. 80-88.

Research output: Contribution to journalArticle

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