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Quantization of electronic states in individual oxide-supported silver particles

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

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Kulawik,  Maria
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Rust,  Hans-Peter
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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Citation

Nilius, N., Kulawik, M., Rust, H.-P., & Freund, H.-J. (2004). Quantization of electronic states in individual oxide-supported silver particles. Surface science, 572(2-3), 347-354. doi:10.1016/j.susc.2004.09.010.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-0ADB-7
Abstract
The electronic properties of Ag particles on Al2O3/NiAl(1 1 0) have been investigated by low-temperature scanning tunnelling microscopy and spectroscopy. Conductance measurements on single clusters revealed a series of equidistant resonances around the Fermi level. The energy separation between these peaks decreases with increasing cluster size. The resonances were interpreted as a discretization of the electronic states along the cluster height. In conductance images of the Ag particles, resonance levels appear as concentric circles of enhanced conductance with a diameter depending on the sample bias. This behaviour reflects the influence of the tip electric field on level positions in the clusters.