CVD of Ionic Liquids @Angewandte Chemie

Film deposition and high-resolution patterning of ionic liquids (ILs) remain a challenge, despite a broad range of applications that would benefit from this type of processing.

In this work, we demonstrate for the first time the chemical vapor deposition (CVD) of ILs. The IL-CVD method is based on the formation of a non-volatile IL through the reaction of two vaporized precursors. Ionogel micropatterns can be easily obtained via the combination of IL-CVD and standard photolithography, and the resulting microdrop arrays can be used as microreactors.

The IL-CVD approach will facilitate leveraging the properties of ILs in a range of applications and microfabricated devices.

The paper can be accessed here or on the Publications page of our website.

Photoswitching in anthracene loaded MOFs @EJIC

The confinement of luminescent guest molecules in porous host materials can induce photophysical properties different from either component in isolation.

In this work, we present the photophysical behavior of anthracene and its substituted analogs in a series of metal-organic frameworks (MOFs) and inorganic molecular sieves. Fluorescence photoswitching of the guest molecules through photoinduced dimerization is observed only in MOFs with a favorable pore volume and geometry.

The paper can be accessed here, or on the Publication page of our website.

Selective deposition of TiO2 @ACS Applied materials & interfaces

Our collaborative work with Imec on the defect-free area-selective atomic layer deposition of titanium oxide has now been published in ACS applied materials & interfaces.

In this work, we investigate the selective deposition of titanium oxide by plasma halogenation of amorphous carbon acting as a growth-inhibiting layer. Additionally, the value of imaging techniques such as atomic force microscopy for understanding defect formation mechanisms and accurately assessing growth selectivity is highlighted.

The paper can be accessed here or on the Publications page of our website.

Our 3D lateral flow test on Advanced Materials cover

An illustration of our research on the 3D printing of monolithic capillarity-driven microfluidic devices for diagnostics made the inside front cover of the June 2021 issue of Advanced Materials.

The paper can be accessed here or on the Publications page of our website.

In situ full adsorption isotherms by "NMR-Relaxorption" @JACS

In collaboration with Prof. Sakellariou (KULeuven), we demonstrate how low-field NMR can be used to measure full adsorption isotherms. By selectively measuring 1H spins of the adsorbed probe molecules, rather than the vapour phase, this "NMR -Relaxorption" technique provides insights about local dynamics beyond what can be learned from physisorption alone.

The benchtop integration of physisorption and NMR relaxometry for in situ, in operando measurements is illustrated by three case studies on prototypical microporous materials.

The paper can be accessed here or on the Publications page of our website.

Review on MOF applications @Angewandte Chemie

Reticular design has enabled the tailorability of MOF properties beyond any other material class. This resulted in significant advances from both a fundamental and an applied perspective. In this review, we discuss the milestones in MOF research, their pathway towards real-world applications and the major challenges that need to be addressed along the way.

The paper can be accessed here or on the Publications page of our website.

MOF-CVD precursor paper @Dalton Transactions

Chemical vapor deposition of metal-organic frameworks (MOF-CVD) will facilitate the integration of porous and crystalline coatings in electronic devices. In the two-step MOF-CVD process, a precursor layer is first deposited and subsequently converted to MOF through exposure to linker vapor.

This work discusses the impact of different metal oxide and metalcone layers as precursors for the MOF-CVD of zeolitic imidazolate framework ZIF-8 films. These precursor layers were prepared by atomic and molecular layer deposition, physical vapor deposition; the effect of treatments such as humidification and annealing of the precursors were also tested.

Check out the paper on the Publications page or through the link to the publisher's page (Dalton Transactions).

Template‐mediated control over polymorphism in MOF-CVD @Angewandte Chemie

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.

Lithography of MOFs on Nature Materials cover

A beautiful illustration of our research on nanoscale lithography of metal-organic frameworks made the cover of the January 2021 issue of Nature Materials.

Our paper on direct lithography of metal-organic frameworks can be accessed here or on the Publications page of our website.

α-MgFm CVD @ Chem Mater!

We demonstrate the need for a gaseous template in the solvent-free synthesis of ultramicroporous α-magnesium formate (α-MgFm). The use of a template does not only open the way for an environmentally friendly synthesis of bulk powder, but also enables the deposition of thin films. Templated MOF-CVD of α-MgFm resulted in high-quality, pinhole-free films with unexpectedly high thermal stability.

The paper can be accessed here or on the Publications page of our website.


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