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首页> 外文期刊>Crystal growth & design >In Situ Observation of Ice Formation from Water Vapor by Environmental SEM
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In Situ Observation of Ice Formation from Water Vapor by Environmental SEM

机译：原位观察由环境SEM从水蒸气形成冰形成

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摘要

A microscopic understanding of the mechanism of direct ice formation from water vapor has a significant benefit for controlling the processes involving ice condensation and evaporation. However, previous studies on this topic have been limited to theoretical simulations or optical observations. Here, by in situ observation via environmental scanning electron microscopy (ESEM), we revealed that hexagonal ice crystals are developed by a step-by-step pathway in a supersaturated water vapor environment. Furthermore, we also discerned that such steps came from two different origins, which are screw dislocations and initial steps. In addition, the relationship between the edge-length (of hexagonal ice crystals) and the growth time was quantitatively studied at controlled temperatures and pressures by experimental data fitting. This study shows that qualitative and quantitative observations of ice formation can be made with simple setups, and it should inspire future investigations toward important physicochemical processes using ESEM, especially those that simultaneously involve two or more phases.
机译：对水蒸气直接冰形成机制的显微理解对于控制涉及冰冷和蒸发的过程具有显着的益处。然而，以前关于该主题的研究仅限于理论模拟或光学观察。这里，通过通过环境扫描电子显微镜（ESEM）的原位观察，我们揭示了六边形冰晶由过饱和水蒸气环境中的逐步途径开发。此外，我们还辨别出这样的步骤来自两种不同的起源，这是螺钉脱位和初始步骤。另外，通过实验数据配件定量地在受控温度和压力下定量地研究边缘长度（六角形冰晶）和生长时间之间的关系。本研究表明，可以使用简单的设置来制造对冰形成的定性和定量观察，并且应该使用ESEM激发未来对重要的物理化学过程的研究，特别是那些同时涉及两相的阶段。

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  • 来源
    《Crystal growth & design》 |2018年第11期|共7页
  • 作者

    Zhang Zhouyang; Fei Linfeng; Rao Zhenggang; Liu Dingjun; Leung C. W.; Wang Yu;

  • 作者单位

    Nanchang Univ Dept Mat Sci &

    Engn Nanchang 330031 Jiangxi Peoples R China;

    Hong Kong Polytech Univ Dept Appl Phys Hong Kong Hong Kong Peoples R China;

    Nanchang Univ Dept Mat Sci &

    Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Inst Adv Sci Nanchang 330031 Jiangxi Peoples R China;

    Hong Kong Polytech Univ Dept Appl Phys Hong Kong Hong Kong Peoples R China;

    Nanchang Univ Dept Mat Sci &

    Engn Nanchang 330031 Jiangxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 晶体学;
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