Size-Dependent Wetting Contact Angles at the Nanoscale Defined by Equimolar Surfaces and Surfaces of Tension

Тип публікації :
Стаття
Дата випуску :
28 грудня 2024 р.
Автор(и) :
Yaroshchuk, Andriy
Yevhenii Shportun
Lacroix, David
LEMTA : Laboratoire Energies et Mécanique Théorique et Appliquée, Université de Lorraine
Isaiev, Mykola
Laboratoire d'énergétique et de mécanique théorique et appliquée, Taras Shevchenko National University of Kyiv, University of Lorraine
Мова основного тексту :
Англійська
eKNUTSHIR URL :
DOI :
Журнал :
Scientific Reports
Том :
14
Випуск :
1
ISSN :
2045-2322
Фінансування :
Energy harvesting via wetting-drying cycles with nanoporous electrodes
Цитування :
[APA 7] Burian, S., Yaroshchuk, A., Yevhenii, S., Булавін, Л. А., Lacroix, D., & Isaiev, M. (2024). Size-Dependent Wetting Contact Angles at the Nanoscale Defined by Equimolar Surfaces and Surfaces of Tension. Scientific Reports, 14(1). https://doi.org/10.1038/s41598-024-82683-2
[ДСТУ] Size-Dependent Wetting Contact Angles at the Nanoscale Defined by Equimolar Surfaces and Surfaces of Tension / S. Burian et al. Scientific Reports. 2024. Vol. 14, no. 1. URL: https://doi.org/10.1038/s41598-024-82683-2 (date of access: 25.07.2026).
The wetting characteristics of fluids play a crucial role in various fields of interface and surface science. Contact angle serves as a fundamental indicator of wetting behavior. However, accurate quantification of wetting phenomena even at the macroscale often poses challenges, particularly due to the hysteresis between receding and advancing contact angles. The complexity increases further at the nanoscale, where the significant volume of the interphase region causes ambiguity in defining the “dividing surface.” In this study, we use molecular dynamics simulations to investigate the wetting dynamics of a “cylindrical nanodroplet” and an argon nanofilm. Through analysis of microscopic density distribution maps and tension tensor distributions within the Gibbs framework, we identified equimolar and tension surfaces at both liquid-gas and liquid-solid interfaces. Our results show over 10% discrepancies between equilibrium contact angles calculated for equimolar surfaces and those based on tension surfaces in the case of the cylindrical nanodroplet. We observed a clear dependence of wetting contact angles on the cross-sectional radius of cylindrical droplets with a straight three-phase contact line. As the radius decreases, the differences between contact angles at equimolar and tension surfaces increase, while for larger droplets, these differences diminish and become negligible.
Ключові слова :
Wetting Nanodroplet Surface tension Wetting contact angle Tolman length
Галузі знань та спеціальності :
10 Природничі науки::104 Фізика та астрономія
Галузі науки і техніки (FOS) :
Фізика конденсованих систем
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