{"insert":{"user_id":"R000061528","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://www.ncbi.nlm.nih.gov/pubmed/40704717","label":"url"},{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=465048","label":"url"}],"paper_title":{"en":"Three-Step Growth of Vapor-Deposited Ice under Mesospheric Temperature and Water Vapor Conditions.","ja":"Three-Step Growth of Vapor-Deposited Ice under Mesospheric Temperature and Water Vapor Conditions."},"authors":{"en":[{"name":"Sato Reo"},{"name":"Noguchi Kentaro"},{"name":"Koshida Hiroyuki"},{"name":"Ishibashi Atsuki"},{"name":"Hama Tetsuya"}],"ja":[{"name":"佐藤 玲央"},{"name":"Noguchi Kentaro"},{"name":"Koshida Hiroyuki"},{"name":"Ishibashi Atsuki"},{"name":"Hama Tetsuya"}]},"description":{"en":"Polar mesospheric clouds provide clues to physicochemical processes in the mesosphere and lower thermosphere. However, the heterogeneous nucleation and growth processes of water ice under polar mesospheric conditions are poorly understood, especially at the nanoscale. This study used reflection high-energy electron diffraction and infrared reflection-absorption spectroscopy to analyze the structure of vapor-deposited ice at polar mesospheric temperature (120 K) under vapor pressure (10-6 Pa) conditions. The ice appeared to grow in three steps during vapor deposition, being amorphous water for the first 15 nm, then cubic ice up to 50 nm, and finally hexagonal ice subsequently. This three-step growth suggests that the three observed phases can coexist in polar mesospheric clouds, depending on the thickness of water ice. The finding of the three-step growth also shows that the Ostwald rule of stages can hold for vapor-deposited ice at low temperature.","ja":"Polar mesospheric clouds provide clues to physicochemical processes in the mesosphere and lower thermosphere. However, the heterogeneous nucleation and growth processes of water ice under polar mesospheric conditions are poorly understood, especially at the nanoscale. This study used reflection high-energy electron diffraction and infrared reflection-absorption spectroscopy to analyze the structure of vapor-deposited ice at polar mesospheric temperature (120 K) under vapor pressure (10-6 Pa) conditions. The ice appeared to grow in three steps during vapor deposition, being amorphous water for the first 15 nm, then cubic ice up to 50 nm, and finally hexagonal ice subsequently. This three-step growth suggests that the three observed phases can coexist in polar mesospheric clouds, depending on the thickness of water ice. The finding of the three-step growth also shows that the Ostwald rule of stages can hold for vapor-deposited ice at low temperature."},"publication_date":"2025-07-24","publication_name":{"en":"The Journal of Physical Chemistry Letters","ja":"The Journal of Physical Chemistry Letters"},"volume":"16","number":"30","starting_page":"7675","ending_page":"7684","languages":["eng"],"referee":true,"identifiers":{"doi":["10.1021/acs.jpclett.5c01536"],"issn":["1948-7185"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}
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{"insert":{"user_id":"R000061528","type":"published_papers"},"similar_merge":{"see_also":[{"@id":"https://web.db.tokushima-u.ac.jp/cgi-bin/edb_browse?EID=465043","label":"url"}],"paper_title":{"en":"Absolute Absorption Cross Section and Orientation of Dangling OH Bonds in Water Ice","ja":"Absolute Absorption Cross Section and Orientation of Dangling OH Bonds in Water Ice"},"authors":{"en":[{"name":"Takumi Nagasawa"},{"name":"Sato Reo"},{"name":"Takeshi Hasegawa"},{"name":"Naoki Numadate"},{"name":"Nobutaka Shioya"},{"name":"Takafumi Shimoaka"},{"name":"Takeshi Hasegawa"},{"name":"Tetsuya Hama"}],"ja":[{"name":"Takumi Nagasawa"},{"name":"佐藤 玲央"},{"name":"Takeshi Hasegawa"},{"name":"Naoki Numadate"},{"name":"Nobutaka Shioya"},{"name":"Takafumi Shimoaka"},{"name":"Takeshi Hasegawa"},{"name":"Tetsuya Hama"}]},"publication_date":"2021-12","publication_name":{"en":"The Astrophysical Journal Letters","ja":"The Astrophysical Journal Letters"},"volume":"923","number":"L3","languages":["eng"],"referee":true,"identifiers":{"issn":["2041-8205"]},"published_paper_type":"scientific_journal"},"priority":"input_data"}