在水友和疏水的密集金属表面上识别一个常见的冰核
Pengcheng Chen1, Qiuhao Xu2, Zijing Ding2
1Princeton Materials Institute, Princeton University, Princeton, NJ, 08540-8211, USA.
Nature communications
|September 19, 2023
概括
科学家们发现,在水友性和水性金属表面上,一个常见的15分子水集群对于冰核形成至关重要. 这一发现推进了异质冰核形成中的水基板相互作用的一般模型.
科学领域:
- 物理化学 物理化学
- 表面科学是一门学科.
- 材料科学 材料科学 材料科学
背景情况:
- 异质冰核形成是复杂的,因为表面水结构多样化.
- 一个通用模型需要在不同的基板上识别共同的水群.
研究的目的:
- 为了识别水友和疏水表面上的常见水群.
- 了解不同基板上的冰核形成的初始阶段.
主要方法:
- 扫描道显微镜 (STM) 的使用
- 无接触原子力显微镜 (NC-AFM) 的应用
主要成果:
- 在Pt{111}和Cu{111}上观察到一个共有的15个分子的水集群,其中包括一个中央六边形和合的五边形.
- 这个星团作为冰形成的关键核.
- 冰的生长分为水友表面的2D层和水害表面的3D层.
结论:
- 确定了一个普遍的水集群,对不同金属表面的冰核形成至关重要.
- 揭示了水友和疏水表面初始冰生长的相似之处和区别.
- 在异质冰核中提供了水基板相互作用的一般模型的基础证据.
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