X-Ray Studies of Phase Transitions on Surfaces

Jens Aage Als-Nielsen

doi:10.1016/0378-4363(84)90157-8

X-Ray Studies of Phase Transitions on Surfaces

Jens Aage Als-Nielsen

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Abstract

The density variation across the surface from vapor to liquid in liquid crystal materials has been measured in the isotropic, nematic and smectic A phases by specular reflection of X rays with grazing angles from θc to θB (total reflection angle and Bragg angle for smectic A layering, respectively) using synchroton X-rays in HASYLAB, Hamburg. Crystalline surface structures may be deduced from X-ray diffraction, utilizing the evanescent beam occuring for grazing angles less than θc to obtain surface sensitivity. Results from the reconstruction of Au(110) surface are reviewed.

Original language	English
Journal	Physica B: Condensed Matter
Volume	126
Issue number	1-3
Pages (from-to)	145-148
ISSN	0921-4526
DOIs	https://doi.org/10.1016/0378-4363(84)90157-8
Publication status	Published - 1984

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title = "X-Ray Studies of Phase Transitions on Surfaces",

abstract = "The density variation across the surface from vapor to liquid in liquid crystal materials has been measured in the isotropic, nematic and smectic A phases by specular reflection of X rays with grazing angles from θc to θB (total reflection angle and Bragg angle for smectic A layering, respectively) using synchroton X-rays in HASYLAB, Hamburg. Crystalline surface structures may be deduced from X-ray diffraction, utilizing the evanescent beam occuring for grazing angles less than θc to obtain surface sensitivity. Results from the reconstruction of Au(110) surface are reviewed.",

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year = "1984",

doi = "10.1016/0378-4363(84)90157-8",

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N2 - The density variation across the surface from vapor to liquid in liquid crystal materials has been measured in the isotropic, nematic and smectic A phases by specular reflection of X rays with grazing angles from θc to θB (total reflection angle and Bragg angle for smectic A layering, respectively) using synchroton X-rays in HASYLAB, Hamburg. Crystalline surface structures may be deduced from X-ray diffraction, utilizing the evanescent beam occuring for grazing angles less than θc to obtain surface sensitivity. Results from the reconstruction of Au(110) surface are reviewed.

AB - The density variation across the surface from vapor to liquid in liquid crystal materials has been measured in the isotropic, nematic and smectic A phases by specular reflection of X rays with grazing angles from θc to θB (total reflection angle and Bragg angle for smectic A layering, respectively) using synchroton X-rays in HASYLAB, Hamburg. Crystalline surface structures may be deduced from X-ray diffraction, utilizing the evanescent beam occuring for grazing angles less than θc to obtain surface sensitivity. Results from the reconstruction of Au(110) surface are reviewed.

U2 - 10.1016/0378-4363(84)90157-8

DO - 10.1016/0378-4363(84)90157-8

M3 - Journal article

SN - 0921-4526

VL - 126

SP - 145

EP - 148

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-3

ER -

X-Ray Studies of Phase Transitions on Surfaces

Abstract

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