X-ray Standing Waves: A Molecular Yardstick for Biological Membranes

X-ray Standing Waves: A Molecular Yardstick for Biological Membranes

Structural information on an atomic scale has been obtained for a Langmuir-Blodgett (LB) trilayer system by means of long-period x-ray standing waves. The LB trilayer of zinc and cadmium arachidate was deposited on a layered synthetic microstructure (LSM) consisting of 200 tungsten/silicon layer pai...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1988-09, Vol.241 (4874), p.1788-1791
Hauptverfasser: Bedzyk, M. J., Bilderback, D. H., Bommarito, G. M., Caffrey, M., Schildkraut, J. S.
Format: Artikel
Sprache:eng
Schlagworte:
Artificial membranes and reconstituted systems
Atoms
Biochemistry
Biological and medical sciences
Bragg reflectors
Braggs law
Diffraction
Fluorescence
Fundamental and applied biological sciences. Psychology
Measurement
Medical imaging
Membrane physicochemistry
Membranes (Biology)
Membranes - ultrastructure
Mirrors
Molecular biophysics
Molecular structure
Particle Accelerators
Plane waves
Specular reflection
Standing waves
Wave diffraction
Wave reflection
X-Ray Diffraction
X-rays
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Zusammenfassung:Structural information on an atomic scale has been obtained for a Langmuir-Blodgett (LB) trilayer system by means of long-period x-ray standing waves. The LB trilayer of zinc and cadmium arachidate was deposited on a layered synthetic microstructure (LSM) consisting of 200 tungsten/silicon layer pairs with a 25 Å period. A 30 Å thermally induced inward collapse of the zinc atom layer that was initially located in the LB trilayer at 53 Å above the LSM surface has been observed. The mean position and width of the zinc atom layer was determined with a precision of ±0.3 Å.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.3175619