ADSORPTION PHENOMENA AT THE SURFACE OF SILICA SPHERES IN A BINARY-LIQUID MIXTURE
ADSORPTION PHENOMENA AT THE SURFACE OF SILICA SPHERES IN A BINARY-LIQUID MIXTURE
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DOI：
10.1103/physrevlett.54.2123
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发表时间：
1985-01-01
影响因子：
8.6
通讯作者：
ESTEVE, D
中科院分区：
文献类型：
--
作者：
BEYSENS, D;ESTEVE, D
用光散射技术研究了直径为1600 μ m的二氧化硅球在水+2-6-二甲基吡啶二元流体中的散射特性。散射光被认为是强烈依赖于温度和浓度。这种效应是由于在球体上出现二甲基吡啶层。层厚度在过渡线附近急剧增加，这是由于吸引力相互作用的结果。这种过渡表现出所有的功能预测的预湿过渡之间的高和低的表面上的流体吸附。
Silica spheres of 1600-Å diameter immersed in the binary fluid water+ 2-6-lutidine have been studied by light-scattering techniques. The scattered light was seen to be strongly dependent on temperature and concentration. This effect is due to the appearance of a lutidine layer on the spheres. The layer thickness dramatically increases near a transition line were the spheres aggregate as a result of attractive interactions. This transition exhibits all the features predicted for the prewetting transition between high and low adsorption of a fluid on a surface.