X-Ray Reflectivity from the Surface of a Liquid Crystal: Surface Structure and Absolute Value of Critical Fluctuations
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Date
1984
Author(s)
Als-Nielsen, J.
Publisher
American Physical Society
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Citation
Pershan, Peter S., and J. Als-Nielsen. 1984. X-ray reflectivity from the surface of a liquid crystal: Surface structure and absolute value of critical fluctuations. Physical Review Letters 52(9): 759-762.
Abstract
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 dependence of the Fresnel effect yields information on surface structure. Measurement of the intensity of diffuse critical scattering relative to the Fresnel reflection yields the absolute value of the critical part of the density-density correlation function.
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