Publications
The self out-of-plane oriented La2O2CO3 film : an integration tool for fiber textured ferroelectric thin films Ghent University
A crucial role in the miniaturization of electronic and photonic components is played by the integration of ferroelectric thin films on silicon (Si) or silicon nitride (SiN) based platforms. Since the properties of ferroelectric thin films strongly depend on their texture quality and crystallographic orientation, the integration of thin films on these platforms is far from trivial. Consequently, this leads to slow, complex and expensive ...
Understanding and hindering ion migration in Er,Yb:LiLuF4 core-shell nanoparticles for nanothermometers with enhanced photoluminescence Ghent University
Developing core–shell nanoparticles is a common approach to improve the luminescence performance of nanomaterials, as an inert shell shields the core, which is doped with luminescent ions, from the quenching influence of the environment. Core-only nanoparticles are susceptible to solvent overtones, which can couple with the emissive dopants on the surface and quench their intensity. This is undeniably highly undesired for any luminescence ...
Controlled BZO nanorod growth and improved flux pinning in YBCO films grown on vicinal STO substrates Ghent University
The present study systematically investigates the impact of strain-induced defects on the anisotropy of the critical current density across wide temperature and magnetic field ranges. We focus on 0-10 wt % BaZrO3 (BZO)-doped YBa2Cu3O7- x (YBCO) thin films that are deposited on SrTiO3 substrates with a 5 degrees surface miscut. Our findings highlight the crucial role played by these vicinal substrates in governing the growth of BZO nanorods ...
Building homogenous and heterogenous shells around LiLuF4:Ln3+ nanothermometers : problems, benefits, and lessons learned Ghent University
Lanthanide-doped nanoparticles are popular candidates for obtaining luminescence properties, including being used as a luminescent thermometer. Their temperature sensitive luminescence allows remote measurements of temperature, even in working environment or hard to reach areas. To enhance luminescence properties of lanthanide-doped nanoparticles a common practice is constructing core-shell structures, where the emissive ions are doped only in ...
Impact of deoxygenation/reoxygenation processes on the superconducting properties of commercial coated conductors Ghent University
We report the evolution of the superconducting properties of a commercial coated conductor during deoxygenation and reoxygenation processes. By analyzing the changes on the critical temperature, Tc, and critical current density, Jc, at 4 and 77 K, we have identified the conditions that cause a complete deoxygenation of the coated conductor and, also, the reoxygenation conditions that allow a recovery of the superconducting properties. A complete ...
Textured growth of oxide materials via chemical solution deposition : a case study for electro-optical thin films Ghent University
Textured Growth of Oxide Materials via Chemical Solution Deposition – A Case Study for Electro-Optical Thin Films Klaartje De Buysser, Ewout Picavet, Hannes Rijckaert, Laura Van Bossele, Arend Mandelings, Isabel Van Driessche, Dries Van Thourhout, Jeroen Beeckman Shifting for randomly oriented polycrystalline films towards highly oriented thin films has been a subject of many studies. Often this goes hand in hand with vacuum techniques or ...
Turning 3D covalent organic frameworks into luminescent ratiometric temperature sensors Ghent University
In this study, we report hybrid crystalline lanthanide-containing 3D covalent organic framework (Ln@3D COF) materials that are suitablefor temperature sensing applications. Different routes to obtain thesehybrid materials were tested and compared for material quality andthermometric properties. In the first approach, a bipyridine-containing3D COF (Bipy COF) was grafted with a range of visible emitting lanthanide(Eu3+, Tb3+, Dy3+, and Eu3+/Tb3+) ...
PZT micro-transfer printing for photonic MEMS Ghent University
This paper demonstrates micro-transfer printing of a photonics-compatible lead zirconate titanate (PZT) film. The PZT coupons were released by etching the underlying SiO2 layer with HF vapor and successfully transferred onto a Si substrate. This technique enables the realization of piezo-MEMS for photonics applications.
A recyclable rhodium catalyst anchored onto a bipyridine covalent triazine framework for transfer hydrogenation of N-heteroarenes in water Ghent University
Covalent triazine frameworks (CTFs) based on polydentate ligands are highly promising supports to coordinate well-defined active metal complexes, hereby combining the well-known reactivity of homogeneous catalysts with the robustness and recyclability of heterogeneous catalysts. Herein, we describe the immobilization of a half-sandwich Rh(III) complex onto a bipyridine-based CTF and its application for the transfer hydrogenation of ...