无人区中水的电子衍射
Electron Diffraction of Water in No Man's Land
AI总结：
本文提出一种在明确温度下快速制备深度过冷水并用电子衍射在结晶前探测的方法，发现水从室温冷却至略低于200 K时结构平滑演化为接近非晶冰，从而缩小了水异常起源的解释范围并开辟了过冷水研究新途径。
摘要：
只有能够系统地表征深度过冷状态下的水（异常现象似乎正源于此），人们才可能对水的异常性质形成公认的理解。由于水在160 K至232 K之间会迅速结晶，这一目标长期以来难以实现。在此，我们提出了一种实验方法，可在明确控制的温度下快速制备深度过冷水，并在结晶发生前用电子衍射对其进行探测。我们表明，当水从室温冷却至低温时，其结构平滑演化，并在略低于200 K时接近非晶冰的结构。我们的实验缩小了对水的异常现象起源的可能解释范围，并为研究过冷水开辟了新途径。
英文摘要：
A generally accepted understanding of the anomalous properties of water will only emerge if it becomes possible to systematically characterize water in the deeply supercooled regime, from where the anomalies appear to emanate. This has largely remained elusive because water crystallizes rapidly between 160 K and 232 K. Here, we present an experimental approach to rapidly prepare deeply supercooled water at a well-defined temperature and probe it with electron diffraction before crystallization occurs. We show that as water is cooled from room temperature to cryogenic temperature, its structure evolves smoothly, approaching that of amorphous ice just below 200 K. Our experiments narrow down the range of possible explanations of the origin for the water anomalies and open up new avenues for studying supercooled water.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
