| 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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Kübel, Christian
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (44/44 displayed)
- 2024Lifecycle of Pd Clusters:Following the Formation and Evolution of Active Pd Clusters on Ceria During CO Oxidation by In Situ/Operando Characterization Techniquescitations
- 2024Graphitizability of Polymer Thin Films: An In Situ TEM Study of Thickness Effects on Nanocrystalline Graphene/Glassy Carbon Formationcitations
- 2024Controlling shear band instability by nanoscale heterogeneities in metallic nanoglasses
- 2024Lifecycle of Pd Clusters: Following the Formation and Evolution of Active Pd Clusters on Ceria During CO Oxidation by In Situ/Operando Characterization Techniques
- 2024Dependence of the Structural and Magnetic Properties on the Growth Sequence in Heterostructures Designed by YbFeO$_3$ and BaFe$_{12}$O$_{19}$
- 2024The Impact of Microstructure on Filament Growth at the Sodium Metal Anode in All‐Solid‐State Sodium Batteries
- 2024Precipitate-mediated enhancement of mechanical and electrical properties in HPTE-processed Al–Mg–Si alloy
- 2024Deformation twins as a probe for tribologically induced stress statescitations
- 2023Graphitizability of Polymer Thin Films: An In Situ TEM Study of Thickness Effects on Nanocrystalline Graphene/Glassy Carbon Formationcitations
- 2023Poly(ethylene oxide)-block-poly(hexyl acrylate) Copolymers as Templates for Large Mesopore Sizes─A Detailed Porosity Analysiscitations
- 2023Kinetics and Pore Formation of the Sodium Metal Anode on NASICON‐Type Na$_{3.4}$ Zr$_2$Si$_{2.4}$P$_{0.6}$O$_{12}$ for Sodium Solid‐State Batteries
- 2023Novel thin film high entropy alloys with tunable microstructure and enhanced mechanical properties
- 2023The Impact of Microstructure on Filament Growth at the Sodium Metal Anode in All‐Solid‐State Sodium Batteriescitations
- 2023Direct Observation of Quadrupolar Strain Fields forming a Shear Band in Metallic Glassescitations
- 2023Deposition of Sodium Metal at the Copper‐NaSICON Interface for Reservoir‐Free Solid‐State Sodium Batteriescitations
- 2023Multi‐component PtFeCoNi core‐shell nanoparticles on MWCNTs as promising bifunctional catalyst for oxygen reduction and oxygen evolution reactionscitations
- 2023Deformation twins as a probe for tribologically induced stress states
- 2023Unraveling the Electrochemical Mechanism in Tin Oxide/MXene Nanocomposites as Highly Reversible Negative Electrodes for Lithium‐Ion Batteriescitations
- 2022Kinetics and Pore Formation of the Sodium Metal Anode on NASICON‐Type Na$_{3.4}$ Zr$_2$Si$_{2.4}$P$_{0.6}$O$_{12}$ for Sodium Solid‐State Batteriescitations
- 2022In Situ Generated Shear Bands in Metallic Glass Investigated by Atomic Force and Analytical Transmission Electron Microscopycitations
- 2022Effects of metal-based additives on dehydrogenation process of 2NaBH4 + MgH2 systemcitations
- 2022Direct observation of Eshelby inclusions in metallic glasses
- 2021Unveiling the Local Atomic Arrangements in the Shear Band Regions of Metallic Glasscitations
- 2021Generating digital twins of mesoporous silica by graph-based stochastic microstructure modelingcitations
- 2020Early deformation mechanisms in the shear affected region underneath a copper sliding contactcitations
- 2020Designing Structurally Ordered Pt/Sn Nanoparticles in Ionic Liquids and their Enhanced Catalytic Performancecitations
- 2020Microfluidic Crystallization of Surfactant-Free Doped Zinc Sulfide Nanoparticles for Optical Bioimaging Applicationscitations
- 2020First-time synthesis of a magnetoelectric core-shell composite via conventional solid-state reactioncitations
- 2019Ostwald-like Ripening in Highly Defective Graphene
- 2019Electron beam effects on oxide thin films - structure and electrical property correlationscitations
- 2018Evolution of Glassy Carbon Microstructure: In Situ Transmission Electron Microscopy of the Pyrolysis Process
- 2018Evolution of Glassy Carbon Microstructure: In Situ Transmission Electron Microscopy of the Pyrolysis Processcitations
- 2018(De)Lithiation Mechanism of Hierarchically Layered LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$_{2}$ Cathodes during High-Voltage Cyclingcitations
- 2018MOF-templated synthesis of 3D Bi2O3 supracrystals with bcc packingcitations
- 2018Structure and Properties of Nanoglassescitations
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychographycitations
- 2015Light emission, light detection and strain sensing with nanocrystalline graphenecitations
- 2015Fatigue Behavior of Ultrafine-Grained Medium Carbon Steel with Different Carbide Morphologies Processed by High Pressure Torsioncitations
- 2015Nanoporous-gold-based composites : toward tensile ductility
- 2014Laser ablation mechanism for modification of composite electrodes with improved electrolyte wetting behaviour
- 2014Density changes in shear bands of a metallic glass determined by correlative analytical transmission electron microscopycitations
- 2013Influence of particle size and fluorination ratio of CFₓ precursor compounds on the electrochemical performance of C-FeF₂ nanocomposites for reversible lithium storagecitations
- 2011Microstructure of sol-gel derived nanoscaled La0.6Sr0.4CoO 3-delta cathodes for intermediate-temperature SOFCs
- 2010Tungsten materials for structural divertor applications
Places of action
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article
Poly(ethylene oxide)-block-poly(hexyl acrylate) Copolymers as Templates for Large Mesopore Sizes─A Detailed Porosity Analysis
Abstract
<p>Mesoporous materials with defined pore geometry act as important models for porous substances being applied in various fields of materials research due to their large surface area─from catalysis to coatings and from solar cells to batteries and capacitors. Thus, understanding structure-property relationships requires the capability of deliberately and precisely tuning the mesoporosity, i.e., pore diameter, connectivity, and wall thickness. However, especially for the interesting pore size range between 35 and 70 nm, only a few convenient block copolymer templates are available using micellar self-assembly. In this study, we synthesized poly(ethylene oxide)-block-poly(hexyl acrylate) copolymers (PEO-b-PHA) by a supplemental activator reducing agent atom transfer radical polymerization (SARA ATRP) and employed them as soft templates for the preparation of ordered mesoporous metal oxide powders with spherical mesopores of ca. 40 nm in diameter, as shown by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and small-angle X-ray scattering (SAXS). With the aid of argon physisorption, STEM-based tomography, and time-of-flight secondary ion mass spectrometry (ToF-SIMS), we performed in-depth elucidation of pore shape and their mutual connection. In the case of mesoporous silica, 40 nm spherical mesopores are connected to 3-4 adjacent pores by 15 nm pore windows as well as 1-2 nm-sized micropores. These micropores seem to originate from single PEO chains penetrating the 17 nm thick pore wall. Compared to such mesoporous silica, mesoporous, crystalline zirconia possesses significantly higher pore accessibility. Furthermore, we prepared a set of PEO-b-PHA block copolymers with different block lengths, showing that mainly the PHA block length governs the mesopore size and thus enables mesopore size tuning. These results highlight that PEO-b-PHA is a promising template for the preparation of mesoporous metal oxides (in particular, crystalline ones) with tailored mesopore sizes, which enables systematic studies on property-porosity relationships.</p>