Synergy between Printex nano-carbons and silver nanoparticles for sensitive estimation of antioxidant activity - Raymundo- Pereira, Paulo Augusto; Campos, Anderson Massahiro de; Prado, Thiago M; Furini, Leonardo Negri; Boas, Naiza Vilas; Calegaro, Marcelo Luiz; Machado, Sergio Antonio Spinola (Analytica Chimica Acta, 2016)