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Christopher Edozie Sunday

Christopher Edozie Sunday

University of Western Cape, South Africa

Title: The enhanced electro-activity of poly 2, 5-dimethoxyaniline doped with gold nanoparticles-dotted nitrophenyl azo functionalized graphene

Biography

Biography: Christopher Edozie Sunday

Abstract

Poly 2, 5-dimethoxyaniline (PDMA) is doped with gold nanoparticle dotted 4-nitrophenyl azo functionalized graphene (AuNp/G-PhNO2) nano-catalyst to enhance its interfacial heterogeneous electron transfer rate. The nanocomposite was electro-deposited on glassy carbon (GC) electrode surface depicted as GC/PDMA/AuNp/G-PhNO2. Comparative voltammetric interrogation of the platform in 1.0M hydrochloric acid showed enhanced electro-activity. It also exhibited quasi-reversible electrochemistry (E°′=235mV) in phosphate buffer saline solution (pH 7.2) involving one electron process. Its charge transfer resistance (Rct) from electrochemical impedance spectroscopy profile monitored with ferro/ferricyanide (Fe(CN)63-/4-) redox probe, decreased by 81% compared to GCE/PDMA indicating that it was much more conducting than its pristine form. This new nano-structured composite is stable, cheap, easy to produce, and a suitable electron transfer mediator which can be applied in the fabrication of electrochemical sensors.