Electrochemical Characterization of Redox Electrocatalytic Film for Application in Biosensors

The development of Point Of Care (POC) systems for applications in biorecognition has motivated research on sensor platforms in which their electrochemical responses can be obtained without the use of redox probes. This paper describes the design and characterization of a film is composed by conductive polymers, nanoparticles and special organic salts. The platform consists of a film of Polianiline, Fulerene C60 and TCNQ, produced on the surface of a glassy carbon electrode and deposited using the drop-casting technique. For the characterization, the electrochemical cyclic voltammetry technique was used. In addition to the voltammogram profile, the reversibility of the platform was analyzed the anodic and cathodic peak current as a function of the scanning speed and its stability. The results demonstrate that produced platform presents significant increase in electron transfer and good electrochemical stability. The main characteristic of the produced platform is that they were tests electrochemical performed without the presence of a redox probe, indicating that all the electron transfer is conducted by the conductive characteristics of the film which was produced and occurrence and because the species generated on the surface the electrode. This represents the initial stage in the development of POC biosensors.