Laser direct writing of metal-organic framework-5 microstructure

We report a femtosecond laser direct writing (LDW) method for localized in-situ fabrication of highly crystalline metal–organic framework (MOF-5) microstructures directly from a precursor solution. Confined photothermal reactions induced by tightly focused pulses enable site-selective crystallization without pre- or post-processing. Structural and spectroscopic analyses confirm the formation of intact coordination frameworks without thermal degradation. This substrate-compatible and straightforward approach provides a new route for spatially controlled synthesis of MOFs, facilitating their direct integration into micro-optical and sensing devices.