Experimental evidence for an original two-dimensional phase structure: an antiparallel semifluorinated monolayer at the air-water interface.
Experimental evidence for an original two-dimensional phase structure: an antiparallel semifluorinated monolayer at the air-water interface.
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原始二维相结构的实验证据：空气-水界面处的反平行半氟化单层。
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
O. Abillon
中科院分区：
文献类型：
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作者：
A. El Abed;M. Faure;E. Pouzet;O. Abillon
我们展示了在空气-水界面上扩散的二嵌段半氟化正烷烃分子的反平行单层的自发形成。我们同时测量表面压力和表面电势与分子面积的关系，并进行掠射 X 射线反射率实验来表征所研究的单层，该单层是在几乎为零的表面压力下获得的，并先于在较高表面压力下形成双层。其厚度为 2.7 nm，被发现与分子面积无关。这种行为可以用范德华力和静电相互作用来解释。
We show the spontaneous formation of an antiparallel monolayer of diblock semifluorinated n-alkane molecules spread at the air-water interface. We used simultaneous measurements of surface pressure and surface potential versus molecular area and performed grazing x-ray reflectivity experiments to characterize the studied monolayer, which is obtained at almost zero surface pressure and precedes the formation of a bilayer at higher surface pressure. Its thickness, equal to 2.7 nm, was found to be independent of the molecular area. This behavior may be explained by van der Waals and electrostatic interactions.