A Controlled Growth Strategy for CAU-17 MOF Thin Films via Two-Step Synthesis

Abstract

Sputtering-assisted synthesis is being investigated for the first time as a novel approach for the fabrication of CAU-17 MOF thin films. This method enables the production of MOF thin films without the risk of forming impurities or requiring harsh conditions, unlike conventional powder-based techniques. In this work, the synthesis of CAU-17 was achieved directly on different substrates via a two-step sequential process. Initially, a thin film of bismuth oxide was deposited onto the substrate using reactive DC magnetron sputtering. This oxide layer was subsequently transformed into CAU-17 MOF through coordination with the organic linker under controlled conditions. The synthesized material was characterized using several advanced characterization techniques. The influence of synthesis conditions, such as growth temperature and formation on the surface of various support materials, was also investigated. This approach paves the way to advanced fabrication of MOF thin films with potential uses in sensing, catalysis, and other cutting-edge technologies.