期刊
MOLECULAR PHYSICS
卷 109, 期 5, 页码 695-708出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00268976.2010.547524
关键词
inhomogeneous systems; Yukawa potential; classical field theory; contact theorem
资金
- National Academy of Sciences of Ukraine (NASU)
- Centre National de la Recherche Scientifique (CNRS) [23999]
- Polish Academy of Science
- CNRS [22557]
We adopt a field-theoretical approach to study the structure and thermodynamics of a spatially confined fluid interacting with the Yukawa potential. We derive analytic expressions for the pressure, the Helmholtz free energy, the correlation function, the density profile, and the adsorption. Different simple analytic expressions of the density profile are compared with the numerical estimation of the mean field results. Beyond the mean field approximation, we show that fluctuations can contribute significantly to the properties of the system. Notably they lead to a desorption phenomenon regardless of the sign of the interaction. As a consequence, a non-monotonous density profile at the wall and adsorption curves as a function of the density are found for some systems. This behaviour rationalizes the ionic depletion phenomenon responsible for the anomalous behaviour of the electric capacitance as a function of temperature. Particular attention is given to the contact theorem condition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据