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Phys. Rev. Lett. 80, 5105 - 5108 (1998)

Quenching of the Size Effects in Free and Matrix-Embedded Silver Clusters

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J. Lermé1, B. Palpant1, B. Prével2, M. Pellarin1, M. Treilleux2, J. L. Vialle1, A. Perez2, and M. Broyer1
1Laboratoire de Spectrométrie Ionique et Moléculaire, CNRS and Université Lyon I, Bâtiment 205, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
2Département de Physique des Matériaux, CNRS and Université Lyon I, Bâtiment 203, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France

Received 24 December 1997

The surface plasmon energy of silver clusters is investigated in the framework of the time-dependent local density approximation. The results are in good agreement with experimental data on free AgN+ clusters and on AgN clusters embedded in solid argon and alumina. The size effects are weak and very sensitive to the matrix, the porosity at the interface, and the cluster charge. It is shown that the core-electron contribution to the metal dielectric function is mainly responsible for the quenching of the size effects in the optical response.


©1998 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.80.5105
DOI: 10.1103/PhysRevLett.80.5105
PACS: 36.40.-c, 71.10.-w, 71.45.Gm

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