Simultaneous Electrodeposition of Reduced Graphene Quantum Dots/Copper Oxide Nanocomposite on the Surface of Carbon Ceramic Electrode for the Electroanalysis of Adenine and Guanine

In this study, simultaneous deposition of copper oxide and electro-reduced graphene quantum dots (ErGQDs) on the surface of carbon ceramic electrode (CCE) was reported. The prepared ErGQDs-CuO/CCE was carefully characterized with Fourier transform infrared spectroscopy, X-ray diffraction, fluorescence spectroscopy, scanning electron microscopy and electrochemical techniques in details. According to scan rate studies in hexacyanoferrate, a remarkable increase in the surface coverage in the presence of ErGQDs was achieved. According to square wave voltammetry results, limit of detection, linear range and sensitivity of the developed biosensor for the simultaneous measurement of Adenine (A) and Guanine (G) were obtained to be 0.041 and 0.111 mu M, 0.1-13 mu M and 0.25-23 mu M, and 4.261 and 1.311 mu A mu M cm(-2) respectively.

Automated summary

In this study, simultaneous deposition of copper oxide and electro-reduced graphene quantum dots (ErGQDs) on the surface of carbon ceramic electrode (CCE) was reported and characterized using various techniques. The presence of ErGQDs led to a remarkable increase in surface coverage, as shown by scan rate studies in hexacyanoferrate. The developed biosensor showed promising detection limits, linear ranges, and sensitivities for the simultaneous measurement of Adenine (A) and Guanine (G).