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P-Type NiO foam with rough nanostructured surface was prepared by the surface treatment of Ni foam, and then it was decorated with n-type ZnO nanopyramids to construct a 3D p–n junction foam. The p–n junction foam was used for electrochemical detection of dopamine and the sensing performance was improved significantly compared with the single NiO and ZnO. High sensitivity (171μA/mmol/L), fast response...
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