To overcome the drawbacks of poor stability and analytical accuracy with exogenous co-reactants in electrochemiluminescence (ECL), a self-enhanced nanoemitter, i.e., polyethylenimine-coupled pyrene derivative doped silica nanoparticles (H 4 -PEI@SiO 2 NPs), is proposed in this work. Here, H 4 -PEI@SiO 2 NPs not only serves as an emitter, but also plays the role of endogenous coreactant. Based on H 4 -PEI@SiO 2 NPs, a self-enhanced ECL aptasensor is fabricated for ultra-sensitive detection of di-2-ethylhexyl phthalate (DEHP). Notably, as the end...
