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V.The painful and sensitive and accurate detection of cancer tumors biomarkers is critically vital that you very early clinical analysis, infection monitoring, and effective disease therapy. Right here, we first demonstrate an aptamer-based regularity change Raman approach via sensing of graphene. This biosensor allows the fast, painful and sensitive, and label-free recognition for the acknowledged protein cancer biomarker, prostate-specific antigen (PSA). Monolayer graphene is required once the Raman substrate,