WITHDRAWN: Determination of dopamine in the presence of ascorbic acid using polyaniline/carbon dot composites

Abstract

Abstract Advancement of new sensor materials appropriate for cost effect, simple, and rapid practical applications is vital in the field of electroanalytical sciences. Carbon based materials that are prepared utilizing various sorts of carbon materials and binders as suspensions or gels have been regularly utilized as dynamic sensor materials. In this study we report the determination of dopamine (DA) in the presence of Ascorbic Acid (AA) using Glassy Carbon Electrode (GCE) modified with Polyaniline (PA), Activated Carbon (AC) and Carbon Dots (C-Dots) prepared from Carica Papaya. Carica Papaya is an easily available fruit and the carbon material obtained from papaya pulp is considered as a green synthesis. A simple and facile method was adopted to synthesize AC and C-Dots from Carica Papaya. Carbon Dots obtained from plant material was characterized by UV, IR and SEM. Polyaniline (PANI) prepared by chemical polymerization was characterized by UV &IR. The electrochemical characterization of modified Glassy Carbon Electrode (GCE) was done by Cyclic Voltammetry. The electroanalytical performance of the GCE modified with PANI/AC, PANI/C-dots was also done by Cyclic Voltammetry. The results showed sensitivity and selectivity of DA with Ascorbic acid’s presence.