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In this study, a novel and sensitive electrochemical aptasensing platform was fabricated for the detection of the breast cancer biomarker HER2. HER2 aptamer was firstly hybridized with ferrocene-labeled DNA/Au nanospheres (FcNS), and then bound with the target HER2. The released FcNS homogeneously hybridized with horseradish peroxidase-labeled DNA/Au nanospheres (HRPNS). Benefiting from the introduction...
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