Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 30, Pages 4804-4811Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201400559
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Funding
- European Union [312483 ESTEEM2]
- Research Department Interfacial Systems Chemistry (IFSC), Ruhr University Bochum
- fund for scientific research Flanders (FWO)
- Hercules Foundation of the Flemish Government
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Control of localized metal-organic framework (MOF) thin film formation is a challenge. Zeolitic imidazolate frameworks (ZIFs) are an important sub-class of MOFs based on transition metals and imidazolate linkers. Continuous coatings of intergrown ZIF crystals require high rates of heterogeneous nucleation. In this work, substrates coated with zinc oxide layers are used, obtained by atomic layer deposition (ALD) or by magnetron sputtering, to provide the Zn2+ ions required for nucleation and localized growth of ZIF-8 films ([Zn(mim)(2)]; Hmim = 2-methylimidazolate). The obtained ZIF-8 films reveal the expected microporosity, as deduced from methanol adsorption studies using an environmentally controlled quartz crystal microbalance (QCM) and comparison with bulk ZIF-8 reference data. The concept is transferable to other MOFs, and is applied to the formation of [Al(OH)(1,4-ndc)](n) (ndc = naphtalenedicarboxylate) thin films derived from Al2O3 nanolayers.
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