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Energy-level splitting of ligand-stabilized Au55 clusters observed by scanning tunneling spectroscopy

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3 Author(s)
Zhang, H. ; Institute of Experimental Physics, University of Saarbrücken, P.O. Box 151150, D-66041 Saarbrücken, Germany ; Hartmann, U. ; Schmid, G.

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A monolayer of Au55 clusters stabilized by [P(C6H5)3]12Cl6 ligands was investigated at 7 K using a low-temperature ultrahigh vacuum scanning tunneling microscope. The topography of single clusters shows the actual arrangement of the C6H5 rings of ligand molecules. Characteristic charge-quantization phenomena usually obtained for metal particles were observed by current–voltage measurements. Spectroscopic data acquired at different locations within a cluster reveal energy levels with average spacing of 170 meV which can be attributed to the Au55 core. © 2004 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:84 ,  Issue: 9 )

Date of Publication:

Mar 2004

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