X-ray measurements of noncapillary spatial fluctuations from a liquid surface

被引：30

作者：

Fukuto, M ^{[1
]}

Heilmann, RK

Pershan, PS

Griffiths, JA

Yu, SJM

Tirrell, DA

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

[3] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.81.3455

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Off-specular diffuse x-ray scattering measurements on both pure water and a homogeneous Langmuir monolayer of poly-gamma-benzyl-L-glutamate (PBLG) on water establish the validity of a proposed sum rule for scattering from capillary fluctuations on liquid surfaces. Excess scattering above the predicted capillary contribution is observed when the PBLG monolayer is compressed beyond its elastic limit. This is interpreted in terms of a second-layer inhomogeneity with a surface correlation length of similar to 1000 Angstrom. Excess off-specular scattering can be used to probe interface correlation lengths from 100 Angstrom to 1 mu m. [S0031-9007(98)07353-0].

引用

页码：3455 / 3458

页数：4

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