A5047226256- Nanocluster Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Metal-Organic Frameworks: Synthesis and Applications
- Catalytic Processes in Materials Science
- Random Matrices and Applications
- Advanced Condensed Matter Physics
- Catalysis and Oxidation Reactions
- Carbon and Quantum Dots Applications
- Luminescence and Fluorescent Materials
- Luminescence Properties of Advanced Materials
- Advanced Photocatalysis Techniques
KU Leuven
2018-2019
Laboratoire de physique des Solides
2018-2019
Unmasking the glow of silver clusters Small stabilized by organic materials or inorganic surfaces can exhibit bright photoluminescence, but origin this effect has been difficult to establish, in part because are heterogeneous and contain many larger inactive clusters. Grandjean et al. studied zeolites, using x-ray excited optical luminescence monitor only emissive structures (see Perspective Quintanilla Liz-Marzán). Aided theoretical calculations, they identified electronic states four-atom...
Unraveling reversible opto-structural switching of few atom luminescent silver clusters confined in LTA zeolites by combination spectroscopic techniques.
The appealing luminescent properties of Ag-zeolites have been shown to be dependent on the local environment confined silver clusters. Herein, we shed light Ag clusters inside hydrated Linde-type A (LTA) zeolites and relate them nature host framework when expanded compressed by incorporation Li+ cations Ag+ loading. Within this scenario, measure a strong emission color shift in these materials, which directly correlate with fine structure details derived optical luminescence-detected X-ray...
Ag clusters (AgCLs) confined within Na-exchanged Linde type A zeolites are studied by X-ray absorption and steady-state time-resolved photoluminescence spectroscopies in a coordinated effort to elucidate the photophysical properties link them precise cluster structure. The hydrated sodalite cage contains mostly tetrahedral [Ag4(H2O)4] located at center of cages, whereas octahedral Ag6 with zeolite framework oxygen (OF) [Ag6(OF)14] formed upon dehydration. time-dependent density functional...
Metal clusters confined inside zeolite frameworks display unique electronic, catalytic, and optical properties. However, so far only silver have shown peculiar luminescent properties, displaying high photoluminescent quantum efficiencies reaching almost unity. In this study, we demonstrate the self-assembly confinement of highly lead (Pb) into molecular-sized cavities Linde Type A (LTA) zeolites. These Pb-LTA samples an intense deep-blue emission with external up to 69% in their partially...
The applicability of Ag-exchanged zeolites as efficient phosphors for the development near ultra-violet primary LEDs is described.