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Cathodoluminescence of small silver particles on Al2O3/NiAl (110)

MPG-Autoren
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Drachsel,  Wolfgang
Chemical Physics, Fritz Haber Institute, Max Planck Society;

Adelt,  M.
Max Planck Society;

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Nilius,  Niklas
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Zitation

Drachsel, W., Adelt, M., Nilius, N., & Freund, H.-J. (2002). Cathodoluminescence of small silver particles on Al2O3/NiAl (110). Journal of Electron Spectroscopy and Related Phenomena, 122(3), 239-249. doi:10.1016/S0368-2048(01)00361-9.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-15D4-F
Zusammenfassung
Cathodoluminescence experiments have been performed on silver clusters, which were grown on well characterized Al2O3 films supported on (110) NiAl crystals. Cluster size and shape were varied via Ag deposition at different temperatures and annealing the samples afterwards. At an electron energy of 50 eV photon emission was observed at the (1,0) plasmon resonance, which was centered at 3.7 eV for a mean size particle at 10 run. The blue shift of similar to200 meV is interpreted by the oblate shape of the particle, as also indicated by the position of the (weak) emission for the (1,I) plasmon. The underlying NiAl exerts minor influence on the plasmon resonance, as the induced image dipole does not couple to the plasmon because of its phase shift of roughly 90degrees.