Polymer lateral diffusion at the solid-liquid interface

被引：91
|
作者：
Zhao, J
Granick, S [1 ]
机构：
[1] Univ Illinois, Dept Mat Sci, Urbana, IL 61801 USA
[2] Univ Illinois, Dept Chem Engn, Urbana, IL 61801 USA
[3] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 20期
关键词：
D O I：
10.1021/ja0493749
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Measurements are presented of how polymer surface diffusion at the solid-liquid interface is controlled by surface coverage. The method of measurement was fluorescence correlation spectroscopy (FCS), and the system was poly(ethylene oxide) (PEG) adsorbed onto methyl-terminated self-assembled monolayers in buffered aqueous solution. The translational diffusion coefficient at first increased with increasing surface concentration, presumably because the number of adsorption sites per molecule decreased. Ultimately it slowed by 1 order of magnitude, presumably reflecting jamming by neighboring chains. Copyright © 2003 American Chemical Society.
引用
收藏
页码：6242 / 6243
页数：2
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