Construction of a highly sensitive non-enzymatic sensor for superoxide anion radical detection from living cells

This article constructed a novel non-enzymatic sensor for the determination of O2
- − by utilizing Cys functionalized MWCNTs as the matrix for electrodepositing of AgNPs. Due to the outstanding electric conductivity of Cys-MWCNTs nanocomposites and the excellent selective catalysis of Ag nanoparticles, this sensor could detect O2
- − release from cancer cells under both the external stimulation and the normal condition.202