毛细管波
表面张力
毛细管作用
范德瓦尔斯力
润湿
吸附
材料科学
毛细管数
毛细管长度
哈密顿量(控制论)
伦纳德琼斯势
凝聚态物理
化学物理
分子动力学
热力学
物理
化学
物理化学
复合材料
分子
计算化学
量子力学
数学优化
数学
作者
Luis G. MacDowell,Jorge Benet,Nebil A. Katcho
标识
DOI:10.1103/physrevlett.111.047802
摘要
Our understanding of both structure and dynamics of adsorbed liquids heavily relies on the capillary wave Hamiltonian, but a thorough test of this model is still lacking. Here we study the capillary wave fluctuations of a liquid film with short-range forces adsorbed on a solid exhibiting van der Waals interactions. We show for the first time that the measured capillary wave spectrum right above the first order wetting transition provides an interface potential consistent with independent calculations from thermodynamic integration. However, the surface tension exhibits an oscillatory film thick dependence which reveals a hitherto unnoticed capillary wave broadening mechanism beyond mere interfacial displacements.
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