STM study of d-alanine adsorption on Cu(0 0 1)

The adsorption of d-alanine on Cu(0 0 1) surface at low coverage was studied by a scanning tunneling microscope. d-alanine forms a c(2 × 4) ordered structure with the arrays aligned dominantly to 〈3 1 0〉 direction on the Cu(0 0 1), and the molecules slightly interact also to 〈1 1 0〉 and 〈1 3 0〉 dire...

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Bibliographic Details
Published in:Surface science 2005-01, Vol.574 (2), p.214-218
Main Authors: Iwai, Hidekazu, Tobisawa, Mine, Emori, Akira, Egawa, Chikashi
Format: Article
Language:English
Subjects:
Biological molecules – proteins
Chemisorption
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Copper
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Physics
Scanning tunneling microscopy
Single crystal surface
Surface structure, morphology, roughness, and topography
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Summary:The adsorption of d-alanine on Cu(0 0 1) surface at low coverage was studied by a scanning tunneling microscope. d-alanine forms a c(2 × 4) ordered structure with the arrays aligned dominantly to 〈3 1 0〉 direction on the Cu(0 0 1), and the molecules slightly interact also to 〈1 1 0〉 and 〈1 3 0〉 directions. It suggests that these anisotropic arrays are organized by the intermolecular interaction due to hydrogen bonding between adjacent d-alanines. The proposed model for adsorbed structure as a tridentate form in nearly atop sites is consistent with the recent study for glycine adsorption on Cu(1 0 0) by photoelectron diffraction.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2004.10.028