Interfacial Engineering of Two-Dimensional Metal-Organic Framework Thin Films for Biomimetic Photoadaptative Sensors

Porphyrin-based two-dimensional metal-organicframeworks(2D MOFs) are of high interest for extraordinary optoelectronic devicesdue to their well-ordered architecture and appealing photochemicalproperties. However, the high-throughput synthesis of 2D MOF thinfilms for device applications remains challenging because of the slownucleation and crystallization process in classical interfacial synthesis.Here, we report a microwave-assisted interfacial methodology for therapid construction (& SIM;3 min) of highly crystalline 2D MOF thinfilms and demonstrate their promising potential in biomimetic opticalsensors. The resultant 2D MOF films exhibit a lateral size of up to & SIM;23 cm(2) and controllable thickness in the rangeof 2-40 nm. The crystal domain size of the 2D MOF can be upto & SIM;4 & mu;m, which boasts a long-range molecular orderingand appealing optical responsive properties. The 2D MOF films enablethe fabrication of biomimetic optical sensors with light intensity-dependentautonomous photoadaptation without the assistance of voltage gating.Furthermore, an artificial machine vision system consisting of a 4x 8 2D MOF-sensor array is developed to implement adaptive imagerecognition under bright- and dim-light stimuli with an accuracy ofover 90%.