INSTABILITY IN A SYSTEM OF 2 INTERACTING LIQUID-FILMS - FORMATION OF LIQUID BRIDGES BETWEEN SOLID-SURFACES
INSTABILITY IN A SYSTEM OF 2 INTERACTING LIQUID-FILMS - FORMATION OF LIQUID BRIDGES BETWEEN SOLID-SURFACES
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DOI：
10.1063/1.464606
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发表时间：
1993-01-01
影响因子：
4.4
通讯作者：
FORCADA, ML
中科院分区：
文献类型：
--
作者：
FORCADA, ML
对由两个固体支撑的液体膜组成的系统的理论研究表明，存在机械不稳定性：当距离小于某个阈值时，由两个单独的液体膜组成的系统没有稳定的平衡构型，系统崩溃形成单一的液体体。当两个固体表面在欠饱和介质内靠近时，连接液体桥的突然冷凝已经使用表面力装置在实验上观察到[参见，例如，Christenson等人，Phys. Rev. B 39，11750（1989）]。本文对这些结果作了如下解释：首先，液膜在表面凝结;然后，如果距离足够短，液膜跳跃接触，这是由于相互吸引力引起的机械不稳定性。
A theoretical study of systems composed of two solid-supported liquid films that are subject to a mutual attractive interaction reveals the existence of a mechanical instability: for distances closer than a certain threshold value, the system composed by two separate liquid films has no stable equilibrium configurations, and the system collapses to form a single liquid body. The sudden condensation of a connecting liquid bridge when two solid surfaces are brought to close proximity inside an undersaturated medium has been observed experimentally using the surface-force apparatus [see, e.g., Christenson et al., Phys. Rev. B 39, 11750 (1989)]. In this paper, these results are explained as follows: first, liquid films condense on the surfaces; then, if the distance is short enough, the films jump to contact, because of a mechanical instability due tc attractive interactions.