Novel Method for the Detection of SARS-CoV-2 Based on Graphene-Impedimetric Immunosenso

Author(s)

Zaccariotto, Gabriel C. ^[1] ; Silva, Martin K. L. ^[1] ; Rocha, Giovanna S. ^[1] ; Cesarino, Ivana ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Sch Agr, Dept Bioproc & Biotechnol, BR-18610034 Botucatu, SP - Brazil

• Document type: Journal article
• Source: MATERIALS; v. 14, n. 15 AUG 2021.
• Web of Science Citations: 2

Abstract

Due to the SARS-CoV-2 pandemic, there has been an increase in the search for affordable healthcare devices for mass testing and rapid diagnosis. In this context, this work described a new methodology for SARS-CoV-2 detection based on an impedimetric immunosensor developed using the advantageous immobilization of antibodies in the reduced graphene oxide (rGO). The rGO was obtained by chemical synthesis from the commercial graphene oxide (GO), and the materials were morphologically, electrochemically and visually characterized. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques were used to evaluate the fabrication steps of the immunosensor. The electrochemical immunoassay was considered for SARS-CoV-2 spike protein RBD detection using a impedimetric immunosensor and redox couple ({[}(Fe(CN)(6))](3-/4-)) as a probe. The immunosensor was effectively developed and applied in the detection of SARS-CoV-2 spike protein RBD in saliva samples. (AU)

• FAPESP's process: 17/24274-3 - Development of glucose biosensor as an analytical tool aiming the optimization of second-generation ethanol production from pineapple residues
• Grantee: Ivana Cesarino
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants