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In this work, we present a multiple amplified electrochemical method that can detect target microRNA‐21 (miRNA‐21) with high sensitivity by using hierarchical flower‐like gold nanostructures (HFGNs) and gold‐enriched enzyme‐free amplification. The HFGNs deposited on ITO conducting glass served as the electrode substrate with large specific surface area, which allowed the immobilization of large amounts...
A novel G‐quadruplex‐based DNAzymes aptasensor for the amplified electrochemical detection of thrombin has been described. The aptasensor utilized a combination of hemin and guanine‐rich thrombin‐binding aptamer (TBA) to form horseradish peroxidase (HRP)‐mimicking DNAzymes with peroxidase catalytic activity. In the presence of thrombin, the enzyme activity could be extensively promoted, thereby providing...
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