LIQUID-GATED TRANSISTORS BASED ON 2D MATERIALS FOR SENSING AND BIOSENSING

Published in 12/12/2023 - ISBN: 978-65-272-0088-8

Paper Title
LIQUID-GATED TRANSISTORS BASED ON 2D MATERIALS FOR SENSING AND BIOSENSING
Authors
  • Gabrielle Coelho Lelis
  • LIMA, A.H (PD); CNPEM - LNNano
  • Rafael Furlan de Oliveira
Modality
Pôster
Subject area
Biossensores / Biomoléculas
Publishing Date
12/12/2023
Country of Publishing
Brasil
Language of Publishing
Inglês
Paper Page
https://www.even3.com.br/anais/workshop-do-ineo-2023/611612-liquid-gated-transistors-based-on-2d-materials-for-sensing-and-biosensing
ISBN
978-65-272-0088-8
Keywords
Liquid-gated transistors, reduced graphene oxide, biosensors
Summary
Liquid-gated transistors (LGTs) have been widely used in sensing and biosensing due to their ability to amplify small signals and inherent operation in aqueous media at low voltages (<1 V) [1]. These are virtuous characteristics for the development of point-of-care diagnostics tools. In LGTs, the electric polarization at the gate terminal promotes the formation of an electrical double layer at the semiconductor/electrolyte interface thus increasing the carrier density in the device channel [2]. Due to interesting electrical properties, such as high mobility of charge carriers (> 1000 cm2/V.s), graphene and related materials have been extensively used in LGTs [3]. In this sense, graphene oxide (GO) appears as a promising 2D material to be used as the sensing and active layer in LGTs. GO can be easily processed in water in high volumes, thus enabling its thin film deposition over large areas using different techniques [1]. Additionally, GO possesses many reactive oxygen functional groups (C-O-C, -OH, C=O, and R-COOH) which allow its ad hoc functionalization with different (bio)receptors to monitor specific analytes. Although GO is an insulating material, its electrical properties can be restored by chemical, thermal and electrochemical reduction to obtain rGO. Here, we designed and fabricated rGO-based LGTs aiming to understand their operation and stability characteristics for future sensing and biosensing applications. Thin films of commercial GO (Graphenea – monolayer content > 95%) were electrostatically deposited on interdigitated electrodes, and further thermally reduced (350 °C for 10 min) to obtain LGTs. The device electrical response, as well as the rGO film morphology, will be presented and discussed. This work aims to develop novel 2D material-based sensors and biosensors for healthcare applications. [1] Furlan de Oliveira, R., Livio, P. A., Montes-García, V., Ippolito, S., Eredia, M., Fanjul-Bolado, P., González García, M. B., Casalini, S., Samorì, P., Liquid-Gated Transistors Based on Reduced Graphene Oxide for Flexible and Wearable Electronics. Adv. Funct. Mater. 2019, 29, 1905375. [2] Liu, N.; Chen, R.; Wan, Q. Recent Advances in Electric-Double-Layer Transistors for BioChemical Sensing Applications. Sensors 2019, 19, 3425. [3] R. A. Picca et al., "A label-free immunosensor based on a graphene water-gated field-effect transistor," 2019 IEEE 8th International Workshop on Advances in Sensors and Interfaces (IWASI), 2019, pp. 136-138.
Title of the Event
Workshop do INEO 2023
City of the Event
Nazaré Paulista
Title of the Proceedings of the event
Anais do Workshop INEO 2023
Name of the Publisher
Even3
Means of Dissemination
Meio Digital

How to cite

LELIS, Gabrielle Coelho; LNNANO, LIMA, A.H (PD); CNPEM -; OLIVEIRA, Rafael Furlan de. LIQUID-GATED TRANSISTORS BASED ON 2D MATERIALS FOR SENSING AND BIOSENSING.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/611612-LIQUID-GATED-TRANSISTORS-BASED-ON-2D-MATERIALS-FOR-SENSING-AND-BIOSENSING. Access in: 13/11/2024

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