Fig. 1: Fabrication of Pt@Cu3(HHTP)2 thin film using MiCS.

a Schematic of Pt@Cu3(HHTP)2 MOF thin-film processing using microfluidic-based solution-shearing process. CuOAC is copper(II) acetate. b Schematic illustration of the microfluidic blade channel. c Schematic illustration of the MOF growth process using solution shearing. The nucleated Pt particle-embedded MOF solution is located between the microfluidic blade and the heated substrate. The MOF growth occurs at the edge of the meniscus. With the continuously supplying solution by the microfluidic blade during solution shearing, large-area and uniform Pt@Cu3(HHTP)2 thin film can be formed. d Crystal structure of Pt@Cu3(HHTP)2 thin film (green sphere: Pt particle). @ means -embedded.