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CuAAC-mediated Au NPs-implemented nanosensors for detection of Cu(II) in surface-based assay. (A) The lateral flow test based on “clickable” DNA and Au NPs for detection of Cu (II). (B) A naked-eye biosensor based on silver enhancement signal amplification strategy and CuAAC for highly sensitive detection of Cu (II). Adapted with permission from [87, 88].
