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Herein a uric acid (UA) biosensor based on triangular Au nanoplates–uricase was presented. In the presence of uricase and oxygen, UA was oxidized to produce H2O2. H2O2 etched the active “tips” area of the triangular Au nanoplates, eventually, it results in great increase in ultraviolet absorbance strength of triangular Au nanoplates. Under the optimized conditions, a linear relationship between the...
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