Fig. 5From: Graphene-based biosensors for the detection of prostate cancer protein biomarkers: a review(Reprinted with permission from [129]. Copyright 2016 Elsevier)Protein capture and detection mediated by Fe3O4@GO sheets. Proteins captured by Fe3O4@GO decorated with detection antibodies. Composite with biomarker was then captured on the sensor surfaces coated with graphene and capture antibodies. Amperometric signal was generated by injecting 100 μL 5 mM H2O2Back to article page