X‐ray tomoscopy reveals the dynamics of ice templating

Abstract: Little experimentally explored and understood are the complex dynamics of microstructure formation by ice-templating when aqueous solutions or slurries are directionally solidified (freeze cast) into cellular solids. With synchrotron-based, time-resolved X-ray tomoscopy it is possible to study in situ under well-defined conditions the anisotropic, partially faceted growth of ice crystals in aqueous systems. Obtaining one full tomogram per second for ≈270 s with a spatial resolution of 6 µm, it is possible to capture with minimal X-ray absorption, the freezing front in a 3% weight/volume (w/v) sucrose-in-water solution, which typically progresses at 5–30 µm s−1 for applied cooling rates of
= 1–10 °C min−1. These time and length scales render X-ray tomoscopy ideally suited to quantify in 3D ice crystal growth and templating phenomena that determine the performance-defining hierarchical architecture of freeze-cast materials: a complex pore morphology and “ridges”, “jellyfish cap”, and “tentacle”-like secondary features, which decorate the cell walls

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch
• Anmerkungen: Advanced functional materials. - 33, 48 (2023) , 2304738, ISSN: 1616-3028

Beteiligte, Orts- und Zeitangaben

• Ereignis: Veröffentlichung
• (wo): Freiburg
• (wer): Universität
• (wann): 2024
• Urheber: Kamm, Paul H. ; Yin, Kaiyang ; Neu, Tillmann Robert ; Schlepütz, Christian M. ; García‐Moreno, Francisco ; Wegst, Ulrike G. K.

Weitere Informationen

• DOI: 10.1002/adfm.202304738
• URN: urn:nbn:de:bsz:25-freidok-2541733
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:55 MESZ