Single-Particle X-ray Scattering Reveals a High Local Supersaturation of Precursors as the Origin of CoO Assembly Formation
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866909951702597632 |
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| author | Harouna-Mayer, Sani Y. Klemeyer, Lars Zito, Cecilia A. Bielecki, Johan Cheng, Xuemei Derelli, Davide Estillore, Armando D. Groene, Tjark L. R. Haas, Lukas V. Letrun, Romain Kim, Chan Koliyadu, Jayanath C. P. Mall, Abhishek Mazumder, Parichita Melo, Diogo V. M. Round, Adam R. Samanta, Amit K. Sarma, Abhisakh Shen, Zhou Sun, Xiao Vagovic, Patrik Wollweber, Tamme Bean, Richard Küpper, Jochen Chapman, Henry N. Koziej, Dorota Ayyer, Kartik |
| author_facet | Harouna-Mayer, Sani Y. Klemeyer, Lars Zito, Cecilia A. Bielecki, Johan Cheng, Xuemei Derelli, Davide Estillore, Armando D. Groene, Tjark L. R. Haas, Lukas V. Letrun, Romain Kim, Chan Koliyadu, Jayanath C. P. Mall, Abhishek Mazumder, Parichita Melo, Diogo V. M. Round, Adam R. Samanta, Amit K. Sarma, Abhisakh Shen, Zhou Sun, Xiao Vagovic, Patrik Wollweber, Tamme Bean, Richard Küpper, Jochen Chapman, Henry N. Koziej, Dorota Ayyer, Kartik |
| contents | Single-particle small-angle X-ray scattering (SP-SAXS) enables quantitative morphological analysis by recording diffraction snapshots from isolated particles using X-ray free-electron laser (XFEL) pulses. Unlike conventional X-ray techniques, which average over the entire illuminated sample volume, SP-SAXS resolves low-contrast, less abundant, or transient species within heterogeneous particle populations that would otherwise remain hidden. Here, we apply SP-SAXS to investigate the solvothermal formation of CoO nanocrystal assemblies from a Co(acac)$_3$ precursor in benzyl alcohol. The single-particle data reveal amorphous, uniform-density Co(acac)$_2$ spheres as transient intermediates that directly crystallize into cavernous CoO nanocrystal assemblies, which explains why CoO forms as hierarchical aggregates rather than as isolated nanocrystals. These results demonstrate that SP-SAXS provides a powerful framework for disentangling morphological heterogeneity in nanoparticle formation processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_08488 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Single-Particle X-ray Scattering Reveals a High Local Supersaturation of Precursors as the Origin of CoO Assembly Formation Harouna-Mayer, Sani Y. Klemeyer, Lars Zito, Cecilia A. Bielecki, Johan Cheng, Xuemei Derelli, Davide Estillore, Armando D. Groene, Tjark L. R. Haas, Lukas V. Letrun, Romain Kim, Chan Koliyadu, Jayanath C. P. Mall, Abhishek Mazumder, Parichita Melo, Diogo V. M. Round, Adam R. Samanta, Amit K. Sarma, Abhisakh Shen, Zhou Sun, Xiao Vagovic, Patrik Wollweber, Tamme Bean, Richard Küpper, Jochen Chapman, Henry N. Koziej, Dorota Ayyer, Kartik Mesoscale and Nanoscale Physics Materials Science Data Analysis, Statistics and Probability Single-particle small-angle X-ray scattering (SP-SAXS) enables quantitative morphological analysis by recording diffraction snapshots from isolated particles using X-ray free-electron laser (XFEL) pulses. Unlike conventional X-ray techniques, which average over the entire illuminated sample volume, SP-SAXS resolves low-contrast, less abundant, or transient species within heterogeneous particle populations that would otherwise remain hidden. Here, we apply SP-SAXS to investigate the solvothermal formation of CoO nanocrystal assemblies from a Co(acac)$_3$ precursor in benzyl alcohol. The single-particle data reveal amorphous, uniform-density Co(acac)$_2$ spheres as transient intermediates that directly crystallize into cavernous CoO nanocrystal assemblies, which explains why CoO forms as hierarchical aggregates rather than as isolated nanocrystals. These results demonstrate that SP-SAXS provides a powerful framework for disentangling morphological heterogeneity in nanoparticle formation processes. |
| title | Single-Particle X-ray Scattering Reveals a High Local Supersaturation of Precursors as the Origin of CoO Assembly Formation |
| topic | Mesoscale and Nanoscale Physics Materials Science Data Analysis, Statistics and Probability |
| url | https://arxiv.org/abs/2512.08488 |