在冰核中比较压力的机械和热力学定义
P Montero de Hijes1, K Shi2, C Vega3
1Faculty of Physics, University of Vienna, A-1090 Vienna, Austria.
The journal of physical chemistry letters
|February 12, 2026
概括
与其他模型不同的是,机械和热力学压力对冰核一致. 然而,基底界面的界面应力和自由能量显著不同,突出了固体-液体界面的机械路径的局限性.
科学领域:
- 热力学是一种热力学.
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
背景情况:
- 之前使用硬球和莱纳德-斯模型的研究表明,与周围的液体相比,水晶核内的机械压力较低.
- 了解固体-液体界面特性对于核化理论和材料设计至关重要.
研究的目的:
- 通过机械途径在超冷水中研究冰核的机械压力和界面应力.
- 为了比较机械和热力学压力和界面应力以及冰水系统的自由能量.
- 为了分析这些特性,特别是在基底界面.
主要方法:
- 利用机械途径,在超冷的TIP4P/冰水中,以1 bar和247 K的速度,确定冰核内的压力.
- 从机械压力计算的界面应力,使用一致的热力学定义.
- 比较机械压力与散装冰的热力学压力在相同的化学电位和界面应力与界面自由能量.
主要成果:
- 发现冰核的机械和热力学压力一致,与硬球和莱纳德-斯模型的发现形成鲜明对比.
- 对核而言,界面应力和界面自由能量是可比的.
- 基底界面表现出一个界面应力,大约是其界面自由能量的两倍.
结论:
- 冰核的机械和热力学压力之间的一致性表明系统依赖的行为.
- 基底界面的界面应力和自由能量之间的显著差异突出了确定固体-液体界面自由能量的机械路线的局限性.
- 需要进一步的研究来完善机械方法,以准确地描述固体-液体接口.
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