X-RAY SCATTERING FROM SURFACES OF ORGANIC CRYSTALS

David Gidalevitz, FEIDENHANS'l Robert (), Detlef M. Smilgies and Leslie Leiserowitz
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David Gidalevitz: Department of Materials and Interfaces, The Weizmann Institute of Science, 76100 Rehovot, Israel
FEIDENHANS'l Robert: Department of Solid State Physics, Risø National Laboratory, DK 4000 Roskilde, Denmark;
Detlef M. Smilgies: Department of Solid State Physics, Risø National Laboratory, DK 4000 Roskilde, Denmark;
Leslie Leiserowitz: Department of Materials and Interfaces, The Weizmann Institute of Science, 76100 Rehovot, Israel

Surface Review and Letters (SRL), 1997, vol. 04, issue 04, 721-732

Abstract: X-ray scattering experiments have been performed on the surfaces of organic crystals. The (010) cleavage planes of β-alanine and α-glycine were investigated, and both specular and off-specular crystal truncation rods were measured. This allowed a determination of the molecular layering at the cleavage planes. Furthermore, the surfaces were investigated during growth and dissolution. No change in surface structure was observed, suggesting that the growth and dissolution is performed via the step edges. Finally, experiments on stereospecific adsorption of methionine on α-glycine were performed, showing that the (S)-methionine molecules are orderly attached to the$(0{\bar 1}0)$surface of α-glycine and also attached to the (010) surface, but not in registry with the substrate.

Keywords: 68.35Bs; 61.10-i; 68.45-v; 82.65-i (search for similar items in EconPapers)
Date: 1997
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DOI: 10.1142/S0218625X97000729

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