Fig. 5
From: Nanozyme-based aptasensors for the detection of tumor biomarkers
(A) Fabrication process of electrochemical dual aptamer biosensor for HER2 detection. Reprinted with permission from [73]. (B) Construction of CA125 colorimetric aptasensor. Reprinted with permission from [76]. (C) Schematic of the principle of the colorimetric biosensor based on RGO-CMCS-Hemin/Pt@Pd NPs for visual detection of GP73. Reprinted with permission from [78]. (D) Schematic diagram of the PEC aptasensor used to detect VEGF165. Reprinted with permission from [83]