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Highly Sensitive Detection of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-State Nanochannels

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Fig. 6. Simulation results of ionic currents in APT/AAO and APT/MOF/AAO. (a) COMSOL modeling diagram of the potential distribution within nanochannels during testing. (b, c) I-V curves before and after binding to the target for APT/AAO and APT/MOF/AAO, respectively. The current increases after APT/AAO and APT/MOF/AAO bind to the targets. (d) Amplification of ion current ratio graphs after the target recognition by APT/AAO and APT/MOF/AAO. The increase in ion current after recognition of the target by APT/MOF/AAO is much larger than that by APT/AAO.