Surface Structure of Alanine on Cu(110) Studied by Fast Atom Diffraction
Abstract
We demonstrate that quantum scattering of fast atoms and molecules under grazing angles of incidence can be exploited to study the structure of organic molecules on metal surfaces. Making use of keV H and He atoms as well as H2 molecules, the surface structures of the chiral amino acid alanine adsorbed on a Cu(110) surface is studied. We present a detailed investigation on the (3×2) phase of a monolayer of enantiopure and racemic alanine on Cu(110), revealing the formation of an elongated surface unit cell of c(n×2) symmetry with n=3.16±0.04 for the sticking out methyl groups of the alanine molecules.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2013
- DOI:
- 10.1103/PhysRevLett.111.137601
- Bibcode:
- 2013PhRvL.111m7601S
- Keywords:
-
- 79.20.Rf;
- 68.49.Bc;
- 68.43.Hn;
- Atomic molecular and ion beam impact and interactions with surfaces;
- Atom scattering from surfaces;
- Structure of assemblies of adsorbates