Fig. 2From: Graphene-based biosensors for the detection of prostate cancer protein biomarkers: a review(Reprinted with permission from [94]. Copyright 2014 Elsevier)Schematic illustration of Label-free electrochemical immunosensors for PC protein biomarkers based on: A graphene-methylene blue nanocomposite, Reprinted with permission from [93], Copyright 2011 Elsevier. B graphene-Au nanocompositeBack to article page