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A simple nonenzymatic immunosensor was developed for sensitive and selective determination of squamous cell carcinoma antigen (SCC-Ag) based on bimetallic gold–silver nanoclusters (AuAg NCs) and reduced graphene oxide-tetraethylene pentamine (rGO-TEPA). rGO-TEPA was used as substrate material to immobilize antibodies since rGO-TEPA has large surface area and excellent conductivity to enhance the electrochemical...
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