Diffusion in ultrathin liquid films

被引：20

作者：

Schuster, J ^{[1
]}

Cichos, F ^{[1
]}

von Borzcyskowski, C ^{[1
]}

机构：

[1] Chemnitz Univ Technol, Inst Phys Opt Spect & Mol Phys, D-09107 Chemnitz, Germany

来源：

EUROPEAN POLYMER JOURNAL | 2004年 / 40卷 / 05期

关键词：

diffusion;

D O I：

10.1016/j.eurpolymj.2004.01.031

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Inhomogeneous molecular diffusion in layered structures of thin liquid films deposited on solid surfaces is observed via wide field single molecule microscopy. The fluorescence dyes Rhodamine 6G and Oregon Green 514 are used to probe the diffusion in tetrakis(2-ethylhexoxy)-silane and polydimethylsiloxane. A broad distribution of diffusion constants is observed which can be attributed to diffusion within distinct layers of the liquid. Comparison with computer simulations shows that diffusion is normal but depends strongly on the distance of the molecules from the solid surface. Diffusion within layers is faster than between the layers and additional temperature activation is necessary to speed up interlayer diffusion. (C) 2004 Elsevier Ltd. All rights reserved.

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收藏

页码：993 / 999

页数：7

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