Evaluation of the Operational Characteristics and Stability of Liquid-gated Transistors based on Reduced Graphene Oxide in Artificial Fluids for Biosensing Applications

• Grant number: 23/03501-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2023
• End date: July 21, 2024
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Rafael Furlan de Oliveira
• Grantee: Gabrielle Coelho Lelis
• Host Institution: Centro Nacional de Pesquisa em Energia e Materiais (CNPEM). Ministério da Ciência, Tecnologia e Inovação (Brasil). Campinas , SP, Brazil
• Associated research grant: 21/06238-5 - Functionalized solution-processed 2D materials: development of prototyping electric sensors and biosensors, AP.JP
• Associated scholarship(s): 23/14319-0 - Reduced graphene oxide electrolyte gated transistors for cellular bioelectronics applications, BE.EP.IC

Abstract

Electrolyte-gated transistors (EGTs) have been considered for at least one decade as powerful transducers in sensing applications due to their high sensitivity for small perturbations at their interface. These devices have peculiar characteristics that arise from their unique architecture and inherent operation in water, such as low voltage operation (< 1V), compatibility with miniaturization and integration with other electric components, and capability to amplify signals. The vast majority of biosensing applications that use EGTs as transducer is based on organic semiconductors as the active layer, however, the use of graphene (and related materials) and other 2D materials have been increasing substantially in recent years. In this project, we will evaluate the operational characteristics and stability of the electrolyte-gated transistors based on reduced graphene oxide (rGO) in artificial human fluids aiming their use as biosensors for healthcare applications. We will carry out analysis of the device curve of current-voltage curves, Dirac voltage and mobility of charge carriers as function of artificial physiological media (e.g sweat, urine and/or saliva).

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)

DE LIMA, ALESSANDRO HENRIQUE; SCARPA, ISABELLA; AZEVEDO, NATHALIA CRISTINE LIMA; LELIS, GABRIELLE COELHO; STRAUSS, MATHIAS; MARTINEZ, DIEGO STEFANI TEODORO; DE OLIVEIRA, RAFAEL FURLAN. Oxidative debris in graphene oxide: a decade of research. JOURNAL OF MATERIALS CHEMISTRY C, v. N/A, p. 24-pg., 2023-09-05. (23/03501-2, 21/06238-5, 19/14949-9)

DE LIMA, ALESSANDRO HENRIQUE; SCARPA, ISABELLA; AZEVEDO, NATHALIA CRISTINE LIMA; LELIS, GABRIELLE COELHO; STRAUSS, MATHIAS; MARTINEZ, DIEGO STEFANI TEODORO; DE OLIVEIRA, RAFAEL FURLAN. Oxidative debris in graphene oxide: a decade of research. JOURNAL OF MATERIALS CHEMISTRY C, v. 11, n. 37, p. 25-pg., 2023-09-28. (23/03501-2, 21/06238-5, 19/14949-9)