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Implementation of an electronic tongue by flow detection of drinking water contaminants

Grant number: 18/09414-6
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2018
Effective date (End): April 30, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: SABESP
Principal researcher:Luiz Henrique Capparelli Mattoso
Grantee:Fernanda Lanzoni Migliorini
Home Institution: Embrapa Instrumentação Agropecuária. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). São Carlos , SP, Brazil
Company:Universidade de São Paulo (USP). Escola Politécnica (EP)
Associated research grant:13/50440-7 - Online water quality analysis (ACQUA-OnLine), AP.PITE

Abstract

This work aims to prepare, characterize and develop a polymeric sensorial system to evaluate water quality by application of low cost interdigitated electrodes. The sensorial system, which must be applied to water quality monitoring, will be constituted by interdigitated graphite microelectrodes coated with nanostructured films of conductive polymers. The specificity of nanostructured sensors occurs as consequence of the application of films with nanometric thickness as sensitive layer, which allows direct interaction of polymeric nanocomposite layer and the chemical substance in analysis (analyte). The National Laboratory of Nanotechnology to Agrobusiness (Laboratório Nacional de Nanotecnologia para o Agronegócio / LNNA), is already in operation at Embrapa Instrumentation, in such a way one of the research themes aims the development, characterization and the application of nanostructured sensors to water quality determination. The sensors which must be applied to electronic tongue to water quality evaluation are composed by three elements: an substract, the interdigitated electrode and the sensitive layer. In this work, the sensitive layer will be composed by nanocomposites containing conductive polymers. In this way, this project proposes the design of interdigitated graphite electrodes by Line Patterning technique by a fast and low cost alternative method, aiming advances in electronic tongue to water quality evaluation. Moreover, novel methodologies to film deposition will be tested, providing a better reproductibility and validation of sensors response. Different polymers will be used to films nanostructuration, which will be characterized in terms of thickness, morphology and roughness, applying thechniques as scanning electron microscopy (SEM) and atomic force microscopy (AFM), as well as spectroscopic techniques (ultraviolet visible (UV-Vis) and Fourier transformed infrared (FTIR)) and X-ray diffatometry (XRD). By electronic tongue analysis, it is intended evaluate its viability as a device to evaluate the quality of potable water in relation to contaminants, as organophosphate pesticides. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MIGLIORINI, FERNANDA L.; TEODORO, KELCILENE B. R.; CORREA, DANIEL S. GREEN-SYNTHESIZED GOLD NANOPARTICLES SUPPORTED ON CELLULOSE NANOWHISKERS FOR EASY-TO-INTERPRET COLORIMETRIC DETECTION OF CADMIUM (II). CELLULOSE CHEMISTRY AND TECHNOLOGY, v. 54, n. 5-6, p. 407-413, MAY-JUN 2020. Web of Science Citations: 0.
MIGLIORINI, FERNANDA L.; TEODORO, KELCILENE B. R.; DOS SANTOS, DANILO M.; FONSECA, FERNANDO J.; MATTOSO, LUIZ H. C.; CORREA, DANIEL S. Electrospun nanofibers versus drop casting films for designing an electronic tongue: comparison of performance for monitoring geosmin and 2-methylisoborneol in water samples. POLYMERS FOR ADVANCED TECHNOLOGIES, v. 31, n. 9 APR 2020. Web of Science Citations: 0.
TEODORO, KELCILENE B. R.; MIGLIORINI, FERNANDA L.; CHRISTINEILI, WANIA A.; CORREA, DANIEL S. Detection of hydrogen peroxide (H2O2) using a colorimetric sensor based on cellulose nanowhiskers and silver nanoparticles. Carbohydrate Polymers, v. 212, p. 235-241, MAY 15 2019. Web of Science Citations: 3.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.