“…MOFs can be modified by introducing acceptable metal ions, replacing them with appropriate functional groups, or combining them with other suitable materials. 23,24 MOFs have open metal sites in their skeletons, which provide mimicked catalytic characteristics as well as enhancing colorimetric signals, potentially improving detection sensitivity. 25 However, the low colorimetric absorption rate and low catalytic reaction rate of MOF-based biosensors prevent them from being used widely.…”