Self-organized structures at the surface of thin polymer films

被引：22
|
作者：
Weh, L [1 ]
机构：
[1] Bundesanstalt Mat Forsch & Prufung, D-12203 Berlin, Germany
来源：
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 1999年 / 8-9卷
关键词：
interfacial instability; dissipative structures; Marangoni-effect; surface tension;
D O I：
10.1016/S0928-4931(99)00070-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
When thin layers of polymer solutions dry by solvent evaporation and/or heating from below, the layers can become hydrodynamically instable. As a result various surface structures occur. A great pattern manifold of such structures has been found. By self-organization small surface motions caused by surface tension differences can be amplified, when the ratio of the driving forces to the damping ones characterized by the Marangoni-number exceeds a critical value. Besides greater and hierarchic subdivided cell patterns, periodic line structures with peak-valley-differences of down to 1 nm have been found in the solidified layers. The surface profiles (3D- and line profiles) have been measured by means of a microscope interferometer. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：463 / 467
页数：5
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