arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.09968cond-mat.mtrl-sci
收藏

$γ$ - AgI基质中偶极对非均匀冰成核的影响

The Effect of Dipole from $γ$-AgI Substrates on Heterogeneous Ice Nucleation

Hao Lu, Quanming Xu, Chaohong Wang, Jianyang Wu, Rongdun Hong, Xiang-Yang Liu, Zhisen Zhang

摘要:

非均质冰成核是物理环境中最常见、最重要的过程之一。碘化银是一种有效的冰核形成剂。然而,碘化银在非均质冰成核中的微观机制尚未完全了解。采用分子动力学模拟方法,通过改变$γ$-AgI在基底上的偶极,研究了不同类型的$γ$-AgI基底对冰成核的促进作用,结果表明,$γ$ -AgI在基底上的偶极可以影响冰成核的构象。带正电荷的表面离子能促进冰的成核,而带负电荷的表面离子则不能促进冰的成核。$γ$ -AgI基质通过调节表面附近水分子的取向来影响冰的成核。

英文摘要:

Heterogeneous ice nucleation is one of the most common and important process in the physical environment. AgI has been proved to be an effective ice nucleating agent in the process of ice nucleation. However, the microscopic mechanism of AgI in heterogeneous ice nucleation has not been fully understood. Molecular dynamics simulations are applied to investigate the ability of which kinds of $γ$-AgI substrate can promote ice nucleation by changing the dipole of $γ$-AgI on the substrate, we conclude that the dipole of $γ$-AgI on the substrate can affect the conformation of ice nucleation. The surface ions with positive charge on the substrate may promote ice nucleation, while there is no ice nucleation founded on the surface ions with negative charge. $γ$-AgI substrates affect ice nucleation through adjust the orientations of water molecules near the surfaces.

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。

↑