For some metal-organic frameworks (MOFs) polymorphism can form a challenge on the synthesis outcome. In this work, we demonstrate a template-mediated MOF-CVD method controlling possible polymorphs, both powder and thin film forms are studied.
Time-resolved in situ synchrotron small-angle X-ray scattering, performed at Elettra Sincrotrone Trieste (Italy), reveals that by introducing template vapor into the MOF-CVD process, the transformation into a dense phase can be avoided, thus resulting in a porous structure.
The paper can be accessed here or on the Publications page of our website.
Nanoscale patterning is a fundamental step in implementing MOFs in miniaturized solid-state devices. We developed a resist-free process to pattern MOFs via direct X-ray (DXRL) and electron-beam (EBL) lithography. This process avoids etching damage and contamination yet leaves the porosity and crystallinity of the patterned MOFs intact. Moreover, the resulting high-quality patterns have an excellent sub-50-nm resolution, approaching the mesoporous regime. To demonstrate some of the capabilities of this method, we fabricated a photonic sensor that responds to organic vapors.
This research was carried out in collaboration with VUB (Belgium), TU Munich (Germany), TU Graz (Austria), and Elettra Sincrotrone Trieste (Italy). This work, published in Nature Materials, will speed up the integration of MOFs into microchips.
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It has been 4.5 years since we welcomed Min Tu as the first postdoctoral researcher in the Ameloot group. Sticking to the MOF field, Min will take on a position in the Neumann Lab (Max Planck Institute) in Germany. He will be researching the use of MOFs as catalysts for sustainable syntheses.
It was an absolute pleasure working with Min and we wish him all the best in his new position.