Dynamics of spontaneous spreading on heterogeneous surfaces in a partial wetting regime

被引:36
作者
Semal, S [1 ]
Voué, M [1 ]
de Ruijter, MJ [1 ]
Dehuit, J [1 ]
De Coninck, J [1 ]
机构
[1] Univ Mons, Ctr Rech Modelisat Mol, B-7000 Mons, Belgium
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 23期
关键词
D O I
10.1021/jp984609m
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We show how the surface coverage of partially n-octadecyltrichlorosilane (OTS) grafted silicon wafer can be estimated from dynamical wetting measurements. By use of the molecular kinetic theory of wetting, values of the effective jump frequency are determined from the relaxation of the contact angle of branched alkane droplets on such heterogeneous substrates. These jump frequencies are correlated to the OTS thickness measured by ellipsometry. The surface composition can then be calculated, indicating the strong influence of the transition from the expanded to the condensed liquid phase on the wetting properties of the substrate.
引用
收藏
页码:4854 / 4861
页数:8
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