Electrochemical modification of a screen-printed electrode surface with Vulcan XC72R and Au/conductive polymers: application to highly sensitive and selective theobromine detection - Silva, Adriana C. da; Oliveira, Igor G.S; Gallina, Fernando C; Souto, Robson S.; Costa Junior, Oswaldo; Lanza, Marcos Roberto de Vasconcelos; Carvalho, Adriana Evaristo de; Barros, Willyam Róger Padilha (Surfaces and Interfaces, 2025)