Enhanced performance of label-free electrochemical immunosensor for carbohydrate antigen 15-3 based on catalytic activity of cobalt sulfide/graphene nanocomposite

[Display omitted] •An immunosensor based on Cobalt sulfides/graphene nanocomposites was developed.•The fabrication of immunosensor for enzyme-free determination of CA15-3 biomarker.•The immunosensor can be utilized as a simple tool to detect of CA15-3 in real sample. In the present study, an electro...

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