Year: 1975
Type: article
Abstract: The epitaxial growth of amino acids such as L-phenyl alanine, L-alanine and L-gultamic acid on nickel crystal was investigated by electron microscopy and diffraction.Amino acids were crystallized from dilute aqueous solutions on (001) nickel films prepared by vacuum-condensation with KC1 cleavage as the substrate.The most preferable positions for the mutual orientation of both crystals, the substrate nickel and overgrown amino acids, were determined by statistical treatment of the angular distribution of appearance frequency.L-phenyl alanine, which assumes three preferable interaxial positions, always shows the same habit plane, indicating a certain state of oriented adsorption at the interface.L-alanine is crystallized in a polymorphic form of unknown structure, suggesting the existence of strong interaction of adsorbed molecules and substrate nickel atoms, which even controls the epitaxial nucleation having a crystal structure different from that of free growth.L-gultamic acid shows different angular distributions of preferred orientation, depending upon the temperature at which the nickel film has been modified in advance with the same species of amino acid.The molecular position was inferred from the mutual orientation to form O-C-O bridge on two neighboring nickel atoms at the interface.
Authors: Katsutoshi Tamabe, Natsu Uyeda
Language: English
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W31272425