在从超冷到环境条件的水中识别局部结构
Riccardo Foffi1, Francesco Sciortino2
1Department of Civil, Environmental and Geomatic Engineering, Institute for Environmental Engineering, ETH Zürich, Laura-Hezner-Weg 7, 8093 Zürich, Switzerland.
The Journal of chemical physics
|March 4, 2024
概括
研究人员使用新的指标 (Ψ) 确定了水中的两个不同的局部结构. 这一发现支持了水是水的理论.
科学领域:
- 物理化学 物理化学
- 热力学是一种热力学.
- 材料科学 材料科学 材料科学
背景情况:
- 假设水的热力学异常源于两个不同的局部结构之间的竞争.
- 以前的结构指标未能在各种条件下可靠地识别这些结构.
研究的目的:
- 引入和验证一种新的指标 (Ψ),用于识别水中的不同局部结构.
- 调查结构指标与液体-液体临界点附近的密度波动之间的关系.
主要方法:
- 利用一种基于键网络连接的新型指标 (Ψ).
- 在广泛的热力学条件 (188-300 K, 0-13 kbar) 中分析了结构数据.
主要成果:
- Ψ指标可靠地在各种条件下确定了水中的两个不同的局部环境.
- 靠近液体-液体临界点,密度波动反映了 Ψ 指标的空间相关性.
结论:
- Ψ指标提供了一种可靠的方法来识别水的独特局部结构.
- 结果强烈支持水异常热力学特性和液体-液体临界点的两结构模型.
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