Abstract
A novel amplification system for electrochemiluminescence (ECL) was developed by combining graphene oxide (GO) and Se nanoparticles, in which the chitosan (CHIT) was used as improver. Based on a series of experiments, the influencing factors and mechanism for ECL emission were determined. Under optimal conditions, the GO/Se nanocomposite produced an intense ECL emission and maintained long-term ECL stability. Significantly, the electrode modified with GO/Se nanocomposite was used to detect the biomolecule dopamine (DA), and showed a linear range from 0.1 to 100 µM, with a detection limit of 0.025 µM.
Acknowledgments
Support for this work comes from the National Natural Science Foundation of China (Nos. 21275006, 20905001, 21071002, 21175001, 21071001, 51142011) and the Anhui Research Project (No. KJ2010A030) and is gratefully acknowledged.