Benchtop fabrication of microgap sensor based on carbon nanomaterials for selective detection of flavonoids

• Grant number: 20/01822-8
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: May 01, 2022
• End date: April 30, 2023
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Maria Valnice Boldrin
• Grantee: Maísa Azevedo Beluomini
• Supervisor: Frank Marken
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Institution abroad: University of Bath, England
• Associated to the scholarship: 18/12131-6 - Wireless electrochemical sensors based screen-printed electrodes modified with metallic nanopores for determination of flavonoids in wastes of the citrus industry, BP.PD

Abstract

In this research project, the redox mechanism of flavonoids will be investigated and employed for sensitive and selective detection with new electroanalytical techniques. For this, a micro- or nano-gap device will be developed, based on a dual-plate electrode design, modified with nanocarbon material such as carbon nanofibers and reduced graphene oxide. This modification will be used in order to increase the surface area and consequently the electrode sensitivity for these redox reactions. The electroanalytical system based on generator-collector feedback detection will be able to (i) amplify the signal and (ii) detect short-lived intermediates, when compared to systems using a single working electrode detector. In addition, to ensure the construction of a device at low-cost, easy preparation, low solution consumption, and nano-properties, a benchtop preparation technique will be applied avoiding the use of complex and expensive techniques. From the results obtained, we hope to develop a selective electrochemical system that can be used for monitoring and for the analysis of natural flavonoids in citrus industry waste. Besides, this collaborative project aims to consolidate the partnership with Prof. Dr. Frank Marken, who has great knowledge and experience in the field. (AU)

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)

BELUOMINI, MAISA AZEVEDO; WANG, YU; WANG, LINA; CARTA, MARIOLINO; MCKEOWN, NEIL B.; WIKELEY, SIMON M.; JAMES, TONY D.; LOZANO-SANCHEZ, PABLO; CAFFIO, MARCO; STRADIOTTO, NELSON RAMOS; et al. Polymer of intrinsic microporosity (PIM-1) enhances hydrogen peroxide production at Gii-Sens graphene foam electrodes. Electrochemistry Communications, v. 143, p. 8-pg., 2022-10-01. (20/01822-8, 14/50945-4)

BELUOMINI, MAISA AZEVEDO; STRADIOTTO, NELSON RAMOS; ZANONI, MARIA VALNICE BOLDRIN; CARTA, MARIOLINO; MCKEOWN, NEIL B.; FLETCHER, PHILIP J.; SAIN, SUNANDA; LI, ZHONGKAI; MARKEN, FRANK. Triphasic Oxygen Storage in Wet Nanoparticulate Polymer of Intrinsic Microporosity (PIM-1) on Platinum: An Electrochemical Investigation. ACS APPLIED MATERIALS & INTERFACES, v. 16, n. 29, p. 9-pg., 2024-07-12. (20/01822-8, 14/50945-4)