| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hofkens, Johan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (44/44 displayed)
- 2024Investigation of the Octahedral Network Structure in Formamidinium Lead Bromide Nanocrystals by Low-Dose Scanning Transmission Electron Microscopycitations
- 2024Investigation of the octahedral network structure in formamidinium lead bromide nanocrystals by low-dose scanning transmission electron microscopycitations
- 2024A critical assessment on calculating vibrational spectra in nanostructured materialscitations
- 2023Slower Auger Recombination in 12-Faceted Dodecahedron CsPbBr3 Nanocrystalscitations
- 2023Deciphering the role of water in promoting the optoelectronic performance of surface-engineered lead halide perovskite nanocrystalscitations
- 2023Deciphering the Role of Water in Promoting the Optoelectronic Performance of Surface-Engineered Lead Halide Perovskite Nanocrystalscitations
- 2023A critical assessment on calculating vibrational spectra in nanostructured materialscitations
- 2023How to GIWAXS: Grazing Incidence Wide Angle X-Ray Scattering Applied to Metal Halide Perovskite Thin Filmscitations
- 2023How to GIWAXS: Grazing Incidence Wide Angle X‐Ray Scattering Applied to Metal Halide Perovskite Thin Filmscitations
- 2023State of the Art and Prospects for Halide Perovskite Nanocrystals.
- 2023Unexpected luminescence of non-conjugated biomass-based polymers: new approach in photothermal imagingcitations
- 2023Temperature-Dependent Evolution of the Structural and Optoelectronic Properties of (NH 4 ) 3 Sb 2 I 9 Single Crystals
- 2023Temperature-Dependent Evolution of the Structural and Optoelectronic Properties of (NH4)3Sb2I9 Single Crystals
- 2022Accurately determining the phase transition temperature of CsPbI3 via random-phase approximation calculations and phase-transferable machine learning potentialscitations
- 2022An embedded interfacial network stabilizes inorganic CsPbI3 perovskite thin filmscitations
- 2022An embedded interfacial network stabilizes inorganic CsPbI3 perovskite thin filmscitations
- 2022Atomic-scale detection of individual lead clusters confined in Linde Type A zeolitescitations
- 2021Vibrational study of lead bromide perovskite materials with variable cations based on Raman spectroscopy and density functional theorycitations
- 2021Two-dimensional perovskites with alternating cations in the interlayer space for stable light-emitting diodescitations
- 2021Heterogeneities and Emissive Defects in MAPbI3 Perovskite Revealed by Spectrally Resolved Luminescence Blinkingcitations
- 2021State of the art and prospects for halide perovskite nanocrystalscitations
- 2020It's a trap! On the nature of localised states and charge trapping in lead halide perovskitescitations
- 2020Accurate modeling of a biological nanopore with an extended continuum frameworkcitations
- 2019Single-Step Synthesis of Dual Phase Bright Blue-Green Emitting Lead Halide Perovskite Nanocrystal Thin Filmscitations
- 2019Influence of carbon nanoparticle addition (and impurities) on selective laser melting of pure coppercitations
- 2019Microscopic insight into non-radiative decay in perovskite semiconductors from temperature-dependent luminescence blinkingcitations
- 2019Indirect tail states formation by thermal-induced polar fluctuations in halide perovskitescitations
- 2019Indirect tail states formation by thermal-induced polar fluctuations in halide perovskitescitations
- 2018Efficient and Selective Photocatalytic Oxidation of Benzylic Alcohols with Hybrid Organic-Inorganic Perovskite Materialscitations
- 2018A general strategy for direct, enzyme-catalyzed conjugation of functional compounds to DNAcitations
- 2017Bosonic Confinement and Coherence in Disordered Nanodiamond Arrayscitations
- 2015Quantitative 3D Fluorescence Imaging of Single Catalytic Turnovers Reveals Spatiotemporal Gradients in Reactivity of Zeolite H-ZSM-5 Crystals upon Steaming
- 2015Quantitative 3D Fluorescence Imaging of Single Catalytic Turnovers Reveals Spatiotemporal Gradients in Reactivity of Zeolite H-ZSM-5 Crystals upon Steamingcitations
- 2014Click Reaction Synthesis and Photophysical Studies of Dendritic Metalloporphyrinscitations
- 2011The Origin of Heterogeneity of Polymer Dynamics near the Glass Temperature As Probed by Defocused Imagingcitations
- 2011Energy Transfer Pathways in a Rylene-Based Triadcitations
- 2010Unraveling excited-state dynamics in a polyfluorene-perylenediimide copolymercitations
- 2009Synthesis, ensemble, and single molecule characterization of a diphenyl-acetylene linked perylenediimide trimercitations
- 2007Fluorescence of single molecules in polymer films: Sensitivity of blinking to local environmentcitations
- 2004Multichromophoric dendrimers as single-photon sources: A single-molecule study
- 2004Multichromophoric dendrimers as single-photon sources:A single-molecule studycitations
- 2003Revealing competitive Forster-type resonance energy-transfer pathways in single bichromophoric molecules
- 2003Intramolecular directional Forster resonance energy transfer at the single-molecule level in a dendritic system
- 2001Single-molecule spectroscopy of a dendrimer-based host-guest system
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article
Quantitative 3D Fluorescence Imaging of Single Catalytic Turnovers Reveals Spatiotemporal Gradients in Reactivity of Zeolite H-ZSM-5 Crystals upon Steaming
Abstract
<p>Optimizing the number, distribution, and accessibility of Bronsted acid sites in zeolite-based catalysts is of a paramount importance to further improve their catalytic performance. However, it remains challenging to measure real-time changes in reactivity of single zeolite catalyst particles by ensemble-averaging characterization methods. In this work, a detailed 3D single molecule, single turnover sensitive fluorescence microscopy study is presented to quantify the reactivity of Bronsted acid sites in zeolite H-ZSM-5 crystals upon steaming. This approach, in combination with the oligomerization of furfuryl alcohol as a probe reaction, allowed the stochastic behavior of single catalytic turnovers and temporally resolved turnover frequencies of zeolite domains smaller than the diffraction limited resolution to be investigated with great precision. It was found that the single turnover kinetics of the parent zeolite crystal proceeds with significant spatial differences in turnover frequencies on the nanoscale and noncorrelated temporal fluctuations. Mild steaming of zeolite H-ZSM-5 crystals at 500 degrees C led to an enhanced surface reactivity, with up to 4 times higher local turnover rates than those of the parent H-ZSM-5 crystals, and revealed remarkable heterogeneities in surface reactivity. In strong contrast, severe steaming at 700 degrees C significantly dealuminated the zeolite H-ZSM-5 material, leading to a 460 times lower turnover rate. The differences in measured turnover activities are explained by changes in the 3D aluminum distribution due to migration of extraframework Al-species and their subsequent effect on pore accessibility, as corroborated by time-of-flight secondary ion mass spectrometry (TOF-SIMS) sputter depth profiling data.</p>