Disjoining Pressure, Healing Distance, and Film Height Dependent Surface Tension of Thin Wetting Films

2014 ◽  
Vol 118 (38) ◽  
pp. 22079-22089 ◽  
Author(s):  
Jorge Benet ◽  
Jose G. Palanco ◽  
Eduardo Sanz ◽  
Luis G. MacDowell
Keyword(s):  
Surface Tension ◽  
Disjoining Pressure ◽  
Wetting Films

scholarly journals Thermodynamics of interfaces extended to nanoscales by introducing integral and differential surface tensions

2021 ◽  
Vol 118 (3) ◽  
pp. e2019873118
Author(s):  
W. Dong
Keyword(s):  
Surface Tension ◽  
Surface Region ◽  
Disjoining Pressure ◽  
Scientific Concept ◽  
Inhomogeneous System ◽  
Surface Tensions ◽  
Nanoscale Systems ◽  
Thermodynamic Potentials ◽  
New Concepts ◽  
Grand Potential

As a system shrinks down in size, more and more molecules are found in its surface region, so surface contribution becomes a large or even a dominant part of its thermodynamic potentials. Surface tension is a venerable scientific concept; Gibbs defined it as the excess of grand potential of an inhomogeneous system with respect to its bulk value per interface area [J. W. Gibbs, “The Collected Works” in Thermodynamics (1928), Vol. 1]. The mechanical definition expresses it in terms of pressure tensor. So far, it has been believed the two definitions always give the same result. We show that the equivalence can break down for fluids confined in narrow pores. New concepts of integral and differential surface tensions, along with integral and differential adsorptions, need to be introduced for extending Gibbs thermodynamics of interfaces. We derived two generalized Gibbs adsorption equations. These concepts are indispensable for an adequate description of nanoscale systems. We also find a relation between integral surface tension and Derjaguin’s disjoining pressure. This lays down the basis for measuring integral and differential surface tensions from disjoining pressure by using an atomic force microscope.

Structural component of disjoining pressure in wetting films of nitrobenzene formed on the lyophilic surface of quartz

Langmuir ◽  
1987 ◽  
Vol 3 (5) ◽  
pp. 628-631 ◽  
Author(s):  
B. V. Deryagin ◽  
Yu. M. Popovskii ◽  
A. A. Goryuk
Keyword(s):  
Structural Component ◽  
Disjoining Pressure ◽  
Wetting Films

Surface force at the nano-scale: observation of non-monotonic surface tension and disjoining pressure

2015 ◽  
Vol 17 (32) ◽  
pp. 20502-20507 ◽  
Author(s):  
Tiefeng Peng ◽  
Mahshid Firouzi ◽  
Qibin Li ◽  
Kang Peng
Keyword(s):  
Surface Tension ◽  
Surface Force ◽  
Md Simulations ◽  
Disjoining Pressure ◽  
Nano Scale ◽  
Disjoining Pressures

The disjoining pressures of thin aqueous salt films at different salt concentrations and temperatures were calculated using MD simulations.

Modelling of disjoining pressure for Lennard-Jones free thin films

2016 ◽  
Vol 30 (10) ◽  
pp. 1650169 ◽  
Author(s):  
Tiefeng Peng ◽  
Xuechao Gao ◽  
Qibin Li ◽  
Siyuan Yang ◽  
Qizhong Tang
Keyword(s):  
Thin Films ◽  
Surface Tension ◽  
High Temperatures ◽  
Molecular Modelling ◽  
Liquid Films ◽  
Processing Technique ◽  
Disjoining Pressure ◽  
Post Processing ◽  
Lennard Jones

Development of disjoining pressure was performed to study the symmetric, Lennard-Jones (LJ) free thin films using molecular modelling. A methodology rooted from film thermodynamics was established to derive the disjoining pressure isotherm [Formula: see text], which is based on the surface tension at varied film thicknesses and can be viewed as a post-processing technique. The results showed that the disjoining pressure of LJ fluid is purely attractive. Compared with the complicated method reported previously, this methodology is demonstrated to be more convenient and readily applicable for other liquid films (e.g. water, aqueous thin films containing electrolyte or surfactants), meanwhile it can be applied at both low and high temperatures.

Disjoining Pressure and Surface Tension of a Small Drop

Langmuir ◽  
2000 ◽  
Vol 16 (7) ◽  
pp. 3502-3505 ◽  
Author(s):  
R. Tsekov ◽  
K. W. Stöckelhuber ◽  
B. V. Toshev
Keyword(s):  
Surface Tension ◽  
Disjoining Pressure ◽  
Small Drop
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