Compared to film fabrication techniques reported in the literatures, this approach is highly attractive. First, the method yields nanometer-thick film compared to the state-of-the-art where it is challenging to reduce thickness below 1000 nm (Figure and Table ). Second, this method of preparing a film is sustainable. The use of water as a solvent is environmentally friendly compared to organic solvent (dimethyl formamide or DMF) which is the solvent of choice in the literatures to form UiO-66 film. Synthesis is carried out at room temperature in a few minutes in contrast to literature where the synthesis of UiO-66-x films typically occurs at temperatures above 80 °C and requires more than 3 hours to form a continuous film (Figure and Table ). Finally, the approach utilizes one of the lowest precursor concentrations for synthesizing UiO-66-x thin films (Figure and Table ), where x can be NH2 or H.