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Development and application of disposable screen-printed composite electrodes based on metallic nanoparticles and graphite-polyurethane

Grant number: 18/11071-0
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2018
Effective date (End): July 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Éder Tadeu Gomes Cavalheiro
Grantee:Isabela Alteia Mattioli
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

In this work, it is proposed to continue the development of composite electrodes based on graphite and polyurethane resin. This proposal will contribute in the line of research focused on the preparation of this material in the form of disposable printed electrodes, modified with metallic nanoparticles. The main advantages of using graphite and polyurethane based composite compared to other conventional electrode materials are: low cost, easy machining and high hydrophobicity. In addition, the possibility of production of work electrodes, reference and counter electrode in a single device by means of printing, makes this technology very attractive. Initially, different proportions between graphite and metallic nanoparticles (in particular, Fe3O4-NPs and AuNPs) and polyurethane resin will be studied. Secondly, we intend to evaluate the development of a disposable printed electrode based only on metallic nanoparticles and polyurethane resin, using AuNPs or other metallic nanoparticles. It is important to note that few research groups deal with these developments in Brazil and the LATEQS group is the only one that prepares composite electrodes based on graphite and polyurethane. Once the electrodes are prepared, the next step will be to evaluate their performance in electroanalytical techniques, such as Cyclic Voltammetry (CV), Differential Pulse Voltammetry (DPV) and/or Square Wave Voltammetry (SWV). To this end, the sensors developed will be tested in these techniques by searching for suitable instrument parameters, in the presence of electrochemical probes and, finally, in the determination of analytes of pharmaceutical, biological and environmental interest. The main contribution of this project is the development of new inks for printed electrodes, which can be subjected to intellectual protection, as has already occurred with graphite based inks. (AU)