文章基本信息

标题：How faceted liquid droplets grow tails
本地全文：下载
作者：Shani Guttman ; Zvi Sapir ; Moty Schultz 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2016
卷号：113
期号：3
页码：493-496
DOI：10.1073/pnas.1515614113
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Liquid droplets, widely encountered in everyday life, have no flat facets. Here we show that water-dispersed oil droplets can be reversibly temperature-tuned to icosahedral and other faceted shapes, hitherto unreported for liquid droplets. These shape changes are shown to originate in the interplay between interfacial tension and the elasticity of the droplet’s 2-nm-thick interfacial monolayer, which crystallizes at some T = Ts above the oil’s melting point, with the droplet’s bulk remaining liquid. Strikingly, at still-lower temperatures, this interfacial freezing (IF) effect also causes droplets to deform, split, and grow tails. Our findings provide deep insights into molecular-scale elasticity and allow formation of emulsions of tunable stability for directed self-assembly of complex-shaped particles and other future technologies.
关键词：emulsions ; membranes' buckling ; topological defects ; two-dimensional crystals ; spontaneous emulsification