COVID-19 impedimetric biosensor based on polypyrrole nanotubes, nickel hydroxide and VHH antibody fragment: specific, sensitive, and rapid viral detection in saliva samples

Arith Ramos Dos Santos, A.P. Macedo de Souza Brandão, Bruna M. Hryniewicz, Hellen Abreu, Larissa Bach-Toledo, Stella Schuster da Silva, Andrei E. Deller, Vanessa Zulkievicz Rogerio, D.S. Baêta Rodrigues, Priscila M. Hiraiwa, B.G. Guimarães, Luís F. Marchesi, Jaqueline Carvalho de Oliveira, Daniela Fiori Gradia, Frederico Luis Felipe Soares, Nilson Ivo Tonin Zanchin, Carolina Camargo de Oliveira, Márcio Vidotti