Figure 10. COF-on-MOF OPECT-based DNA sensors. a) Gate functionalization process where COF-on-MOF and target DNA trigger GWS growth. b) Schematic of the COF-on-MOF OPECT. c) IDS-step responses of the system to various concentrations of HTLV-II DNA, representing the disparity in values between the currents before and after illumination, and d) the corresponding calibration curve [212] (CC BY-SA 4.0).