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Quantized Layer Growth at Liquid-Crystal Surfaces
(American Physical Society, 1986)
We report x-ray reflectivity measurements on the free surface of dodecylcyanobiphenyl (12CB) at the isotropic to smectic-A phase transition. At about \(10^{\circ}C\) above \(T_{IA}\), smectic-A-like ordering develops at ...
Smectic-A Order at the Surface of a Nematic Liquid Crystal: Synchrotron X-Ray Diffraction
(American Physical Society, 1982)
A novel geometry in which it is possible to do x-ray diffraction from a horizontal surface of fluids is applied to liquid crystals. A large-diameter drop of octyloxycyanobiphenyl (8OCB) on a glass plate treated for homeotropic ...
Synchrotron X-Ray Study of Novel Crystalline-B Phases in Heptyloxybenzylidene-Heptylaniline (7O.7)
(American Physical Society, 1982)
This paper reports an x-ray diffraction study of structures and restacking transitions within the B phases of heptyloxybenzylidene-heptylaniline. The system evolves from a hexagonal close-packed structure, through intermediate ...
X-Ray Reflectivity from the Surface of a Liquid Crystal: Surface Structure and Absolute Value of Critical Fluctuations
(American Physical Society, 1984)
X-ray reflectivity from the surface of a nematic liquid crystal is interpreted as the coherent superposition of Fresnel reflection from the surface and Bragg reflection from smectic order induced by the surface. Angular ...
Surface Roughness of Water Measured by X-Ray Reflectivity
(American Physical Society, 1985)
The roughness of the liquid-vapor interface for pure water was measured by a technique of x-ray reflectivity. With synchrotron radiation \((\lambda \sim1.5 \mathring{A})\), the angular dependence of the x-ray reflectivity ...
X-Ray Reflectivity Studies of a Microemulsion Surface
(American Physical Society, 1988)
The surface structure of the AOT (sodium di-2-ethylsulfosuccinate) microemulsion system with equal volume fractions of D2O and decane, for AOT volume fractions of 0.42, 0.305, and 0.181, has been studied by a combination ...
Capillary Waves on the Surface of Simple Liquids Measured by X-Ray Reflectivity
(American Physical Society, 1988)
The properties of the liquid-vapor interface for three simple liquids (water, carbon tetrachloride, and methanol) have been measured using x-ray reflectivity. The measured surface roughness is interpreted using a model ...
X-Ray Scattering Study of Restacking Transitions in the Crystalline-B Phases of Heptyloxybenzylidene Heptylaniline (7O.7)
(American Physical Society, 1985)
This paper reports a comprehensive x-ray diffraction study of the structure and the restacking transitions which occur within the crystalline-B phases of N-[4-(n-heptyl)oxybenzylidene]-4’-(n-heptyl)aniline (7O.7). Between ...
Smectic Layering at the Free Surface of Liquid Crystals in the Nematic Phase: X-Ray Reflectivity
(American Physical Society, 1987)
Smectic layering at the surface and smectic fluctuations in the bulk can be studied simultaneously by x-ray specular reflectivity and scattering measurements. There is a peak in the angular dependence of the specular ...
Synchrotron X-Ray Diffraction Study of Liquid Surfaces
(Elsevier, 1983)
A spectrometer for X-ray diffraction and refraction studies of horizontal, free surfaces of liquids is described. As an illustration smetic-A layering at the surface of a liquid crystal is presented.