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Observing ice structure of micron-sized vapor-deposited ice with an x-ray free-electron laser
Seoul Natl Univ, Inst Appl Phys, Ctr THz Driven Biomed Syst, Dept Phys & Astron,Coll Nat Sci, Seoul, South Korea.;Adv Inst Convergence Technol, Ctr Appl Electromagnet Res, Suwon, South Korea..
Seoul Natl Univ, Inst Appl Phys, Ctr THz Driven Biomed Syst, Dept Phys & Astron,Coll Nat Sci, Seoul, South Korea.;Adv Inst Convergence Technol, Ctr Appl Electromagnet Res, Suwon, South Korea..ORCID-id: 0000-0001-9419-1263
Adv Inst Convergence Technol, Ctr Appl Electromagnet Res, Suwon, South Korea..
Seoul Natl Univ, Res Inst Basic Sci, Dept Chem, 1 Gwanakro, Seoul 08826, South Korea..
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2023 (engelsk)Inngår i: Structural Dynamics, E-ISSN 2329-7778, Vol. 10, nr 4, artikkel-id 044302Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The direct observation of the structure of micrometer-sized vapor-deposited ice is performed at Pohang Accelerator Laboratory x-ray free electron laser (PAL-XFEL). The formation of micrometer-sized ice crystals and their structure is important in various fields, including atmospheric science, cryobiology, and astrophysics, but understanding the structure of micrometer-sized ice crystals remains challenging due to the lack of direct observation. Using intense x-ray diffraction from PAL-XFEL, we could observe the structure of micrometer-sized vapor-deposited ice below 150K with a thickness of 2-50 mu m grown in an ultrahigh vacuum chamber. The structure of the ice grown comprises cubic and hexagonal sequences that are randomly arranged to produce a stacking-disordered ice. We observed that ice with a high cubicity of more than 80% was transformed to partially oriented hexagonal ice when the thickness of the ice deposition grew beyond 5 mu m. This suggests that precise temperature control and clean deposition conditions allow mu m-thick ice films with high cubicity to be grown on hydrophilic Si3N4 membranes. The low influence of impurities could enable in situ diffraction experiments of ice nucleation and growth from interfacial layers to bulk ice.

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American Institute of Physics (AIP), 2023. Vol. 10, nr 4, artikkel-id 044302
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Identifikatorer
URN: urn:nbn:se:uu:diva-510783DOI: 10.1063/4.0000185ISI: 001045012300001PubMedID: 37577135OAI: oai:DiVA.org:uu-510783DiVA, id: diva2:1795229
Forskningsfinansiär
Swedish Research Council, 2017-05128Swedish Research Council, 2021-1st-XSS-025Göran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology, 1808Tilgjengelig fra: 2023-09-07 Laget: 2023-09-07 Sist oppdatert: 2023-09-07bibliografisk kontrollert

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