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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Equation of State for Monolayers under Consideration of the Two-dimensional Compressibility in the Condensed State
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Equation of State for Monolayers under Consideration of the Two-dimensional Compressibility in the Condensed State

机译：考虑压缩态二维压缩性的单分子层状态方程

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摘要

The equation of state for Langmuir monolayers proposed earlier (Fainerman, V.B.; Vollhardt, D.J. Phys. Chem. B 1999, 103, 145.) is generalized for the case that one, two or more phase transitions in the monolayer take place, provided that the two-dimensional compressibility undergoes a jump at the phase transition, whereas within any condensed phase of the monolayer this compressibility is proportional to the surface pressure. N-Tetradecyl-β-hydroxy-propionic acid amide (THPAA) monolayers undergo two phase transitions during the compression, demonstrated experimentally both by the cusps of the surface pressure-area (Π-A) isotherm and the results of grazing incidence X-ray diffraction (GIXD). The theoretical Π-A isotherm agrees satisfactorily with the experimental data if the THPAA molecular characteristics obtained from independent GIXD experiments are taken as model parameters.
机译：较早提出的Langmuir单分子层的状态方程（Fainerman，VB; Vollhardt，DJ Phys.Chem.B 1999，103，145.）适用于在单分子层中发生一个，两个或多个相变的情况，条件是二维可压缩性在相变处经历跳跃，而在单层的任何凝结相中，该可压缩性与表面压力成比例。 N-十四烷基-β-羟基丙酸酰胺（THPAA）单层在压缩过程中经历了两个相变，通过表面压力区域（Π-A）等温线的尖端和掠入射X射线的结果进行了实验证明衍射（GIXD）。如果将从独立GIXD实验获得的THPAA分子特性作为模型参数，则理论Π-A等温线与实验数据令人满意。

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