单分子膜系统中二维生长过程的研究(英文)

Two Dimensional Crystallization in Lipid Monolayers

当处于气液界面的类脂类化合物的单分子膜被压缩时 ,随着分子间距的缩小 ,单分子膜将经历一系列相变过程。通过荧光显微术可以观测到新相的成核和生长过程。由于单分子膜的二维特性 ,该系统中的实验观测对于检验和发展二维界面生长理论尤为重要。本文总结了近年来本课题组与相关单位合作 ,在单分子膜系统中发现的实验现象以及对其生长机制的系列研究。内容包括对单分子膜系统中的成核、界面稳定性、枝晶生长、形态演变等的观测和分析。

By compressing a monolayer film,the coexistence of liquid condensed (LC) and liquid expanded (LE) phases can be reached.The transition from LE to LC is usually regarded as a first-order one,so the theory of crystallization can be applied.In this article we review our recent studies on the growth of LC domains in the LE-LC coexistence region driven by the illumination of a fluorescent microscope.The mechanism of this unusual 2D domain growth phenomenon is discussed.The formation of faceted, dendritic and fractal-like domains as well as the evolution and the transition of these patterns are investigated.