Exploring general nature of interfacial melting on ice crystals: in situ approach by optical microscopy

探索冰晶界面熔化的一般性质：光学显微镜原位方法

• 批准号: 21H01824
• 负责人: 村田 憲一郎
• 金额: $ 11.32万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21H01824/
• 关键词: 氷の界面融解; 疑似液体層; 光学顕微鏡その場観察; 結晶成長; 擬似液体層

令和４年度は正立型レーザー共焦点微分干渉顕微鏡（LCM-DIM）に全反射照明を組み込んだ氷成長観察チャンバーを完成させ，全反射用プリズム上での微粒子からのエバネッセント光の散乱を検出することに成功した．しかし，全反射用プリズム上に効率的に単結晶氷をヘテロエピタキシャル成長させる透明基板を用意することができず（当初はマイカ（雲母）を想定していたが，再現性良くベーサル面を成長させるには不適であった），氷表面上でのエバネッセント光の発生と微粒子からの散乱を検出するまでには至らなかった．その中で年度末に差し掛かり，パラフィンをガラス基板に蒸着することで効率よく氷単結晶ベーサル面をエピタキシャル成長させることができることが分かってきた．また，様々な成長基板を模索する中で，塩化ナトリウム結晶を用いて予備的な観察をしたところ，潮解現象と氷の表面融解の間に類似性があるという極めて興味深い結果が得られた．具体的には，低湿度領域から潮解を引き起こす高湿度領域における塩化ナトリウム結晶表面の動態を観察したところ，潮解により生じる結晶表面の水膜は，単に湿度に応じて膜厚を増大させるのではなく，準不完全濡れという特異的な濡れ状態を経由していること，そして水膜の濡れ状態の変化が水膜内部の塩化ナトリウム結晶の成長・融解と結びついていることが分かってきた．これらの水膜の特徴は氷表面の擬似液体層の振る舞いとよく似ている．この研究成果は，本研究課題が表面における水や氷の相転移現象をより統一的な理解につながる可能性を強く示唆している．

In the year 4, the total reflection lighting system of the upright differential interference micrometer (LCM-DIM) has been used to observe the completion of the radar, and the total reflection has been successfully detected by the microparticles on the radar. The growth of the transparent substrate is intended to increase the temperature of the total reflection. the growth of the transparent substrate is intended to improve the overall reflection. the growth of the transparent substrate is intended to increase the temperature of the total reflection. In the middle of the year, the temperature difference between the end of the year and the temperature at the end of the year, the substrate steamed the temperature, the temperature, The growth of the substrate is in the middle of the model, and the thermal analysis is performed by using the equipment to observe the temperature. The solubility is similar to the melting temperature on the surface of the substrate. The results show that the results show that the results are very good. Specific conditions, low humidity domain temperature response leads to high humidity field temperature response, high humidity field temperature response, high humidity temperature response. The surface of the crystal is covered with water film, humidity, film thickness, temperature, temperature and temperature. The surface of the water film is similar to that of the liquid, the surface of the water film is similar to that of the liquid, the surface of the water film is similar to that of the liquid, the surface of the water film is similar to that of the liquid, the surface of the water film is similar to that of the liquid, the surface of the water film is similar to that of the liquid, the surface of the water film is like liquid, the surface of the water film is like liquid, the surface of the water film is similar to that of liquid, vibration and dance. The problem of this study is that the phase shift is similar to the understanding of the possibility of the system.

项目成果

In-situ optical microscopy observation of elementary steps on ice crystals grown in vapor and their growth kinetics

原位光学显微镜观察蒸气中冰晶的基本步骤及其生长动力学

• DOI: 10.1016/j.pcrysgrow.2021.100550
• 发表时间: 2021
• 期刊: Progress in Crystal Growth and Characterization of Materials
• 影响因子: 5.1
• 作者: Sazaki Gen;Inomata Masahiro;Asakawa Harutoshi;Yokoyama Etsuro;Nakatsubo Shunichi;Murata Ken-ichiro;Nagashima Ken;Furukawa Yoshinori
• 通讯作者: Furukawa Yoshinori

氷の融液成長界面における秩序形成と成長ダイナミクス

冰融生长界面的有序形成和生长动力学

• 发表时间: 2022
• 作者: Kano Emi;Kataoka Keita;Uzuhashi Jun;Chokawa Kenta;Sakurai Hideki;Uedono Akira;Narita Tetsuo;Sierakowski Kacper;Bockowski Michal;Otsuki Ritsuo;Kobayashi Koki;Itoh Yuta;Nagao Masahiro;Ohkubo Tadakatsu;Hono Kazuhiro;Suda Jun;Kachi Tetsu;Ikarashi Nobuyuki;村田憲一郎
• 通讯作者: 村田憲一郎

The emergence of drop-type and thin-layer-type quasi-liquid layers on ice crystal surfaces and their thermodynamic origin

冰晶表面水滴型和薄层型准液态层的出现及其热力学起源

• DOI: 10.1016/j.jcrysgro.2022.126853
• 发表时间: 2022
• 期刊: Journal of Crystal Growth
• 影响因子: 1.8
• 作者: Sazaki Gen;Murata Ken-ichiro;Asakawa Harutoshi;Nagashima Ken;Nakatsubo Shunichi;Furukawa Yoshinori
• 通讯作者: Furukawa Yoshinori

高分解光学顕微鏡で見る氷結晶のミクロな成長ダイナミクス

使用高分辨率光学显微镜观察冰晶的微观生长动力学

• 发表时间: 2021
• 期刊: 化学と工業
• 作者: Y. Zhou;L. Sun;S. Watanabe;T. Ando;村田憲一郎
• 通讯作者: 村田憲一郎

Transmission Electron Microscopy Study of the Morphology of Ices Composed of H2O, CO2, and CO on Refractory Grains

• DOI: 10.3847/1538-4357/ac0ae6
• 发表时间: 2021-09-01
• 期刊: ASTROPHYSICAL JOURNAL
• 影响因子: 4.9
• 作者: Kouchi, Akira;Tsuge, Masashi;Watanabe, Naoki
• 通讯作者: Watanabe, Naoki