Microstructure and crystal order during freezing of supercooled water drops
Microstructure and crystal order during freezing of supercooled water drops
复制标题
过冷水滴冻结过程中的微观结构和晶序
DOI：
10.1038/s41586-023-06283-2
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发表时间：
2023
期刊：
影响因子：
64.8
通讯作者：
Hayes, Matt J.
中科院分区：
文献类型：
--
作者：
Kalita, Armin;Mrozek-McCourt, Maximillian;Kaldawi, Thomas F.;Willmott, Philip R.;Loh, N. Duane;Marte, Sebastian;Sierra, Raymond G.;Laksmono, Hartawan;Koglin, Jason E.;Hayes, Matt J.
过冷水滴广泛用于研究过冷水、冰成核、-和液滴冻结、、、、、-。它们在大气中的冻结影响云的动力学和气候反馈，并且可以通过二次冰生成加速云冻结，，，-。液滴冻结发生在多个时间尺度和长度尺度上，并且具有足够的随机性，使得两个冻结的液滴不太可能是相同的。在这里，我们使用光学显微镜和 X 射线激光衍射来研究在 234–235 K 左右均匀冰成核后真空中数万个水微滴的冻结。在水滴图像的基础上，我们开发了一个七阶段冻结模型，并用它来计时衍射数据。来自冰晶的衍射表明，在冻结后不到 1 毫秒内就形成了长程晶序，而来自剩余液体的衍射变得与来自预融化冰上的准液体层的衍射相似。冰在冻结后具有应变的六方晶体结构，这是一种早期亚稳态，可能先于具有堆积缺陷的冰形成。这里报道的技术可以帮助确定其他条件下的冻结动力学，例如云中的液滴冻结，或帮助了解其他材料的快速凝固。
Supercooled water droplets are widely used to study supercooled water,, ice nucleation, –and droplet freezing, , , , –. Their freezing in the atmosphere affects the dynamics and climate feedback of clouds,and can accelerate cloud freezing through secondary ice production, , –. Droplet freezing occurs at several timescales and length scales,and is sufficiently stochastic to make it unlikely that two frozen drops are identical. Here we use optical microscopy and X-ray laser diffraction to investigate the freezing of tens of thousands of water microdrops in vacuum after homogeneous ice nucleation around 234–235 K. On the basis of drop images, we developed a seven-stage model of freezing and used it to time the diffraction data. Diffraction from ice crystals showed that long-range crystalline order formed in less than 1 ms after freezing, whereas diffraction from the remaining liquid became similar to that from quasi-liquid layers on premelted ice,. The ice had a strained hexagonal crystal structure just after freezing, which is an early metastable state that probably precedes the formation of ice with stacking defects,,. The techniques reported here could help determine the dynamics of freezing in other conditions, such as drop freezing in clouds, or help understand rapid solidification in other materials.
影响因子：
5.7
作者：
Buttersack, Tillmann;Weiss, Volker C.;Bauerecker, Sigurd
通讯作者：
Bauerecker, Sigurd
单次和单粒子 X 射线衍射实验揭示原子晶体的结晶动力学
DOI：
10.1073/pnas.2111747118
发表时间：
2021
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
Niozu Akinobu;Owada Shigeki;Tono Kensuke;Kameshima Takashi;Joti Yasumasa;Katayama Tetsuo;Togashi Tadashi;Yabashi Makina;Matsuda Kazuhiro;Bostedt Christoph;Ueda Kiyoshi;Nagaya Kiyonobu他
通讯作者：
Nagaya Kiyonobu他
DOI：
10.1016/0001-6160(53)90006-6
发表时间：
1953-01-01
期刊：
ACTA METALLURGICA
影响因子：
--
作者：
WILLIAMSON, GK;HALL, WH
通讯作者：
HALL, WH