A Self‐Assembly MOF‐on‐MOF Heterostructure‐Driven Fluorescence Sensor for Aerogel‐Based Visualization Detection of Flavomycin

Abstract Polymetallic MOFs heterostructural composites enhance their usage in a range of sensing domains by combining two or more different MOFs to produce a new MOF‐on‐MOF integrated module. As its widespread utilization of flavomycin (Fla), there are currently complications with agricultural residue and the environment, consequently, a highly sensitive, portable technology for identification will be required to handle environmental monitoring in real‐time. In this work, the structural characterization and characteristics of the two‐layer MOF‐on‐MOF heterostructure are investigated using the epitaxial growth method. Electrons migrate from the Fe metal center to the organic ligand primarily as a result of hydrogen bonding between Fla and the surface of Fe‐MOF and energy transfer amongst the Fe atoms and NH 2 ‐MIL‐101 (Eu). The synergistic impact of NH 2 ‐MIL‐101(Eu) and Fe‐MOF improves the sensitivity and accuracy of detection, which has a 4.8 n m detection limit, enabling the high sensitivity detection of Fla. Likewise, we put together a handheld sensing platform incorporating aerogel and sensing materials that can meet the expectations of real‐time monitoring and multiple actual sample detection, and fluorescent MOFs materials offer an innovative viewpoint on the application of creating flexible sensors, enabling a new method of visualization for food safety and environmental early alerting.