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http://dx.doi.org/10.4283/JKMS.2006.16.1.079

Quantitative Structure Determinations of Glycine/Cu(100) and Cu(110)  

Kang, J.H. (Department of Electro and Nano Physics, Kookmin University)
Abstract
The first quantitative structure determination has been obtained for Cu(100)/glycine $(NH_2CH_3COOH)$. The molecule is adsorbed on the surface via two functional groups: the nitrogen of the amino group and one or both two oxygen atoms of the carboxylate group are bonded in near atop site. The Cu-N is tilted $5^{\circ}\pm4^{\circ}C$, away from the surface normal whilst the Cu-O is tilted by $9^{\circ}\pm2^{\circ}C$. The chemical bonding lengths are determined with $2.05\pm0.02\;{\AA}$ for both Cu-N and Cu-O. This bonding geometry is similar to that of glycine on Cu(110). A reanalysis of O Is from the Cu(110)$(2\times3)$pg-glycine show two oxygen atoms are inequivalent, with one being offset $0.29\;{\AA}$ more than the other.
Keywords
photoelectron diffraction; adsorption site; glycine;
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