Search

Your search keyword '"Vasylieva, Olga"' showing total 8 results
Start Over Author "Vasylieva, Olga"
8 results on '"Vasylieva, Olga"'

3. Raw data for 'Imaging Cu2O nanocube hollowing in solution by quantitative in situ X-ray ptychography'

Author

Grote, Lukas, Seyrich, Martin, Döhrmann, Ralph, Harouna-Mayer, Sani Y., Mancini, Federica, Kaziukenas, Emilis, Fernandez-Cuesta, Irene, Zito, Cecilia A., Vasylieva, Olga, Wittwer, Felix, Kronenberg, Michal, Mogos, Natnael, Landmann, Mirko, Schroer, Christian G., and Koziej, Dorota

Subjects
cSAXS, hollow, ptychography, in situ, multi-slice, nanoparticles, P06, PSI, PETRA III, nanocubes
Abstract

Raw data for "Imaging Cu2O nanocube hollowing in solution by quantitative in situ X-ray ptychography" Ptychographic data sets The file "raw_data_ptychography.zip" contains one HDF5 archive for each ptychographic scan. The archives are structured as follows: section experiment: identifiers of the lightsource, beamline, beamtime, session number, and scan number section measured: N diffraction patterns of size 512x512 px N scan positions in mm one detector mask of size 512x512 px slice separation in mm for multi slice reconstruction section parameters: distance between sample and detector in mm pixel size of detector in mm photon energy in keV cropping of diffraction patterns in px used during reconstruction The following list shows the scan numbers with their corresponding reaction times and slice separations for the in situ series measured at beamline P06 at 15.25 keV. scan number slice distance, mm reaction time, h 232 1 0.20 233 1 0.56 234 1 0.92 235 1 1.27 236 1 1.63 237 1 2.01 238 0.98 2.36 239 0.96 2.72 240 0.94 3.08 241 0.9 3.43 242 0.88 3.83 243 0.86 4.19 244 0.84 4.54 245 0.82 4.90 246 0.82 5.26 247 0.82 5.63 248 0.8 5.98 249 0.8 6.34 250 0.8 6.70 251 0.78 7.05 252 0.78 7.43 253 0.78 7.79 254 0.76 8.15 255 0.76 8.50 256 0.76 8.86 257 0.74 9.23 258 0.74 9.58 259 0.72 9.94 260 0.72 10.30 261 0.7 10.65 262 0.68 11.07 263 0.66 11.42 264 0.64 11.78 266 0.62 12.17 267 0.6 12.53 268 0.58 12.89 269 0.56 13.24 270 0.54 13.60 271 0.52 13.99 272 0.5 14.37 273 0.46 14.72 274 0.42 15.08 275 0.4 15.44 277 0.4 15.87 278 0.4 16.22 279 0.36 16.58 280 0.3 16.93 281 0.25 17.29 282 0.25 17.68 283 0.25 18.04 289 0.2 20.45 290 0.2 21.47 Ptychographic reconstructions The file "ptychographic_reconstructions.zip" contains the ptychographic reconstructions shown in the article and supplementary information in tiff format. Stacks of images corresponding to time series: P06_15.25_keV_scans_00232-00283_entrance_window_aligned.tif P06_15.25_keV_scans_00232-00283_exit_window_aligned.tif cSAXS_8.98_keV_scans_00200-00324_aligned.tif Single images (the file name indicates the respective figure): P06_15.25_keV_scan_00289_Figure_6_a.tif P06_15.25_keV_scan_00290_Supplementary_Figure_11.tif cSAXS_8.98_keV_scan_00347_Supplementary_Figure_13_d.tif cSAXS_8.98_keV_scan_00586_Supplementary_Figure_14_a.tif SEM images The file "SEM_images.zip" contains the SEM images shown in the article and supplementary information in tiff format. The file names indicate the respective figure: Figure_5_h.tif Figure_5_i.tif Figure_6_b.tif Supplementary_Figure_14_b.tif, Acknowledgements: This work was supported by the Bundesministerium für Bildung und Forschung (BMBF) within the Röntgen-Ångström-Cluster via the project 05K2020 - 2019-06104 XStereoVision (grant no. 05K20GUA), by the European Research Council within the project LINCHPIN (grant no. 818941), and by the Cluster of Excellence "CUI: Advanced Imaging of Matter" of the Deutsche Forschungsgemeinschaft (DFG) – EXC 2056 – project ID 390715994.

Published
2022
Full Text
View/download PDF

4. Multimodal imaging of cubic Cu2O@Au nanocage formation via galvanic replacement using X-ray ptychography and nano diffraction.

Author

Grote, Lukas, Hussak, Sarah-Alexandra, Albers, Leif, Stachnik, Karolina, Mancini, Federica, Seyrich, Martin, Vasylieva, Olga, Brückner, Dennis, Lyubomirskiy, Mikhail, Schroer, Christian G., and Koziej, Dorota

Subjects
X-rays, RADIATION damage, NANOPARTICLES, CRYSTAL structure, NANOSTRUCTURED materials
Abstract

Being able to observe the formation of multi-material nanostructures in situ, simultaneously from a morphological and crystallographic perspective, is a challenging task. Yet, this is essential for the fabrication of nanomaterials with well-controlled composition exposing the most active crystallographic surfaces, as required for highly active catalysts in energy applications. To demonstrate how X-ray ptychography can be combined with scanning nanoprobe diffraction to realize multimodal imaging, we study growing Cu2O nanocubes and their transformation into Au nanocages. During the growth of nanocubes at a temperature of 138 °C, we measure the crystal structure of an individual nanoparticle and determine the presence of (100) crystallographic facets at its surface. We subsequently visualize the transformation of Cu2O into Au nanocages by galvanic replacement. The nanocubes interior homogeneously dissolves while smaller Au particles grow on their surface and later coalesce to form porous nanocages. We finally determine the amount of radiation damage making use of the quantitative phase images. We find that both the total surface dose as well as the dose rate imparted by the X-ray beam trigger additional deposition of Au onto the nanocages. Our multimodal approach can benefit in-solution imaging of multi-material nanostructures in many related fields. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

6. Imaging Cu2O nanocube hollowing in solution by quantitative in situ X-ray ptychography.

Author

Grote, Lukas, Seyrich, Martin, Döhrmann, Ralph, Harouna-Mayer, Sani Y., Mancini, Federica, Kaziukenas, Emilis, Fernandez-Cuesta, Irene, A. Zito, Cecilia, Vasylieva, Olga, Wittwer, Felix, Odstrčzil, Michal, Mogos, Natnael, Landmann, Mirko, Schroer, Christian G., and Koziej, Dorota

Subjects
X-rays, ENERGY storage, X-ray imaging, ENERGY consumption, SPATIAL resolution, X-ray scattering
Abstract

Understanding morphological changes of nanoparticles in solution is essential to tailor the functionality of devices used in energy generation and storage. However, we lack experimental methods that can visualize these processes in solution, or in electrolyte, and provide three-dimensional information. Here, we show how X-ray ptychography enables in situ nano-imaging of the formation and hollowing of nanoparticles in solution at 155 °C. We simultaneously image the growth of about 100 nanocubes with a spatial resolution of 66 nm. The quantitative phase images give access to the third dimension, allowing to additionally study particle thickness. We reveal that the substrate hinders their out-of-plane growth, thus the nanocubes are in fact nanocuboids. Moreover, we observe that the reduction of Cu2O to Cu triggers the hollowing of the nanocuboids. We critically assess the interaction of X-rays with the liquid sample. Our method enables detailed in-solution imaging for a wide range of reaction conditions. Observing morphological changes of nanoparticles in solution requires advanced in-situ imaging methods. Here, the authors use X-ray ptychography to image the growth and hollowing of Cu2O nanocubes in 3D. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results