| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Diaz, Ana
Paul Scherrer Institute
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Phase-separated polymer blends for controlled drug delivery by tuning morphologycitations
- 20234D nanoimaging of early age cement hydrationcitations
- 20233D-Imaging of synapses in neuronal tissues with synchrotron X-ray ptychographycitations
- 2023In situ compression of micropillars under coherent X-ray diffraction: a case study of experimental and data-analysis constraintscitations
- 2023Simple Synthesis of Monodisperse Ultrasmall Au Icosahedral Nanoparticlescitations
- 2022Near-infrared analysis of nanofibrillated cellulose aerogel manufacturingcitations
- 2022Near-infrared analysis of nanofibrillated cellulose aerogel manufacturingcitations
- 2022Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychographycitations
- 2022Temperature-dependent dynamic plasticity of micro-scale fused silicacitations
- 2021Quantitative analysis of cementitious materials by X-ray ptychographic nanotomography
- 2020Comparison of small‐angle neutron and X‐ray scattering for studying cortical bone nanostructurecitations
- 2019Quantitative disentanglement of nanocrystalline phases in cement pastes by synchrotron ptychographic X-ray tomographycitations
- 2018Photonic materials for high-temperature applications: synthesis and characterization by X-ray ptychographic tomography
- 2017Anisotropy development during HDPE necking studied at the microscale with in situ continuous 1D SAXS scanscitations
- 2016Novel micro-reactor flow cell for investigation of model catalysts using in situ grazing-incidence X-ray scatteringcitations
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychography
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychographycitations
- 2014Scanning X-ray strain microscopy of inhomogeneously strained Ge micro-bridgescitations
- 2013Density mapping of hardened cement paste using ptychographic X-ray computed tomographycitations
- 2012Preparation and characterization of ellipsoidal-shaped thermosensitive microgel colloids with tailored aspect ratioscitations
Places of action
| Organizations | Location | People |
|---|
article
Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychography
Abstract
A novel complementary approach of electron microscopy/environmental TEM and in situ hard X-ray ptychography was used to study the thermally induced coarsening of nanoporous gold under different atmospheres, pressures and after ceria deposition. The temperature applied during ptychographic imaging was determined by IR thermography. While using elevated temperatures (room temperature – 400 °C) and realistic gas atmospheres (1 bar) we achieved for the first time a spatial resolution of about 20 nm during hard X-ray ptychography. The annealing of pure and ceria stabilized nanoporous gold in different atmospheres revealed that the conditions have a tremendous influence on the coarsening. The porous structure of the samples was stable up to approximately 800 °C in vacuum, whereas pronounced changes and coarsening were observed already at approximately 300 °C in oxygen containing atmospheres. A layer of ceria on the nanoporous gold led to an improvement of the stability, but did not alleviate the influence of the gas atmosphere. Different behaviors were observed, such as coarsening and even material loss or migration. The results suggest that additional mechanisms beyond surface diffusion need to be considered and that microscopic studies aimed at more realistic conditions are important to understand the behavior of such materials and catalysts.