Abstract

Size effects during phase transformations in submicrometer- and nanometer-sized systems manifest themselves in a substantial change of the phase diagrams. The construction of phase diagrams of small-volume ternary and multicomponent systems has not yet been mastered. Using an aniline–methylcyclopentane–hexane solution as an example, the effect of the particle (droplet) size on the region of segregation of droplets with a core–shell configuration with a radius of 100 and 50 nm at temperatures of 25 and 45°C is simulated by the methods of chemical thermodynamics. For this system, a decrease in the volume leads to a change in the region of heterogeneity, to the appearance of metastable states that are absent in macrophases, and to an increase in the thermodynamic stability of a homogeneous solution of poorly soluble components.

中文翻译：

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三元体系中液相平衡的尺寸效应

摘要

在亚微米级和纳米级系统的相变过程中，尺寸效应表现为相图的实质性变化。小体积三元和多组分系统的相图构造尚未掌握。以苯胺-甲基环戊烷-己烷溶液为例，在25和45°C的温度下，粒径（液滴）对核壳结构半径为100和50 nm的液滴分离区域的影响通过化学热力学方法进行模拟。对于该系统，体积的减少会导致异质性区域的变化，宏观相中不存在的亚稳态的出现，以及难溶组分均质溶液的热力学稳定性增加。