Tuning the energetics and tailoring the optical properties of silver clusters confined in zeolites
| Autor: | Eduardo Coutino-Gonzalez, Dirk De Vos, Johan Hofkens, Fanny Richard, Peter Lievens, Olivier James Fenwick, Sara Bonacchi, Wouter Baekelant, Paolo Samorì, Didier Grandjean, Maarten B. J. Roeffaers |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Photoluminescence
Materials science ELECTRON-SPIN-RESONANCE ALKALI-METAL CLUSTERS IONIZATION-POTENTIALS AG NANOCLUSTERS FAUJASITE-TYPE FLUOROPHORES REDUCTION CHEMISTRY OXIDATION CATALYSTS Physics::Optics Nanotechnology 02 engineering and technology Dielectric 010402 general chemistry 01 natural sciences Metal Condensed Matter::Materials Science Cluster (physics) General Materials Science Confined space Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrostatics 0104 chemical sciences Characterization (materials science) Mechanics of Materials Chemical physics visual_art visual_art.visual_art_medium Ionization energy 0210 nano-technology |
| Popis: | The integration of metal atoms and clusters in well-defined dielectric cavities is a powerful strategy to impart new properties to them that depend on the size and geometry of the confined space as well as on metal–host electrostatic interactions. Here, we unravel the dependence of the electronic properties of metal clusters on space confinement by studying the ionization potential of silver clusters embedded in four different zeolite environments over a range of silver concentrations. Extensive characterization reveals a strong influence of silver loading and host environment on the cluster ionization potential, which is also correlated to the cluster’s optical and structural properties. Through fine-tuning of the zeolite host environment, we demonstrate photoluminescence quantum yields approaching unity. This work extends our understanding of structure–property relationships of small metal clusters and applies this understanding to develop highly photoluminescent materials with potential applications in optoelectronics and bioimaging. ispartof: Nature Materials vol:15 issue:9 pages:1017-1022 ispartof: location:England status: published |
| Databáze: | OpenAIRE |
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