Vibrational measurements of Na/Ni(111) and (Na + CO)/Ni(111)

被引：5

作者：

Politano, A. ^{[1
]}

Agostino, R. G. ^{[1
]}

Colavita, E. ^{[1
]}

Formoso, V. ^{[1
]}

Tenuta, L. ^{[1
]}

Chiarello, G. ^{[1
]}

机构：

[1] Univ Calabria, Dipartimento Fis, Consorzio Nazl Interuniv Sci Fis Mat, I-87036 Cosenza, Italy

来源：

JOURNAL OF MATERIALS SCIENCE | 2008年 / 43卷 / 10期

关键词：

D O I：

10.1007/s10853-007-2281-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The vibrational properties of Na atoms and of Na coadsorbed with CO on Ni(111) have been studied by high-resolution electron energy loss spectroscopy. Loss measurements showed a significant weakening of the alkali-substrate bond as a function of the alkali coverage. Moreover, we found that coadsorbed CO molecules dramatically influence the vibrational properties of Na adatoms. The Na-Ni stretching frequency (22 meV) measured on the Na/Ni(111) system shifted down to 13 meV for the (Na + CO)/Ni(111) surface. This unexpected result was ascribed to a charge transfer from Na to CO. Present findings give new insights on the nature of the alkali-substrate and alkali-CO bond.

引用

页码：3447 / 3451

页数：5

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