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Journal Article

The CO stretch frequency of fully CO covered Ag-clusters in dependence on cluster size

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Rabin,  Irene
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Schulze,  Wilfried
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Froben, F. W., Rabin, I., Ritz, M., & Schulze, W. (1996). The CO stretch frequency of fully CO covered Ag-clusters in dependence on cluster size. Zeitschrift für Physik D, 38(4), 335-338. doi:10.1007/s004600050100.


Cite as: https://hdl.handle.net/21.11116/0000-0009-AFA6-7
Abstract
Silver clusters Agn prepared either by the gas aggregation technique (GAT) or by matrix aggregation of Ag were embedded in CO and CO/Ar-matrices. The vibrational CO stretch frequency at the monolayer coverage, which is found on bulk silver at 2110 cm-1, preserves its value with decreasing particle size, Agn n≥300. For smaller clusters a decrease of this frequency with decreasing size was observed. For the smallest investigated clusters Agn, n∼30, a value of 2080 cm-1 was obtained. The weakening of the CO bond is an indication of a charge transfer from the cluster to the CO monolayer. This result is in accordance with the surface plasmon absorption measurements of Ag-clusters isolated in CO matrices.