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Fe3O4@Au nanomaterials were prepared by the self‐assembly method. An enzyme‐free, ultrasensitive electrochemical detection of uric acid was achieved based on the peroxidase‐like activity of Fe3O4@Au. The proposed procedure has exhibited excellent catalytic activities and achieved significant enhancements of the current responses to uric acid. The detection range was from 0.1 to 10 mmol/L, and the...