Investigating liquid surfaces down to the nanometer scale using grazing incidence X-ray scattering

被引:20
作者
Fradin, C
Braslau, A
Luzet, D
Alba, M
Gourier, C
Daillant, J [1 ]
Grubel, G
Vignaud, G
Legrand, JF
Lal, J
Petit, JM
Rieutord, F
机构
[1] CEA Saclay, Serv Phys Etat Condense, Orme Merisiers, F-91191 Gif Sur Yvette, France
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] CEA, DRFMC, SI3M, F-38054 Grenoble, France
来源
PHYSICA B | 1998年 / 248卷
关键词
liquid surfaces; surfactant monolayers;
D O I
10.1016/S0921-4526(98)00255-5
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Grazing incidence X-ray surface scattering has been used to investigate liquid surfaces down to the molecular scale. The free surface of water is well described by the capillary wave model ([z(q)z( - q)] proportional to q(-2) spectrum) up to wave vectors > 10(8) m(-1). At larger wave vectors near-surface acoustic waves must be taken into account. When the interface is bounded by a surfactant monolayer, it exhibits a bending stiffness and the bending rigidity modulus can be measured. However, bending effects generally cannot be described using the Helfrich Hamiltonian and the characteristic exponent in the roughness power spectrum can be smaller than 4. Finally, upon compression, tethered monolayers formed on a subphase containing divalent ions are shown to buckle in the third dimension with a characteristic wavelength on the order of 10(8) m(-1). (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:310 / 315
页数:6
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