Abstract
Using a simple hydrothermal process, ZnO nanosheet balls (ZnO NSBs) were in situ synthesized on three-dimensional graphene foam grown by chemical vapor deposition using nickel foam as the template. The hybrid ZnO NSB/GF was acted as a free-standing electrode for electrochemical detection of dopamine in the presence of uric acid. The results show that ZnO NSBs with the diameter of ∼2 μm and sheet thickness of ∼50 nm are distributed on the surface of GF. The ZnO NSB/GF electrode exhibits a high sensitivity of 0.99 μA μM−1 for the determination of dopamine. It also shows a low detection limit, good selectivity, reproducibility and stability. And it is potential for use in clinical research.
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