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Phys. Rev. Lett. 92, 216801 (2004) [4 pages]

Detection of Quantum Confined States in Au Nanoclusters by Alkali Ion Scattering

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G. F. Liu1, Z. Sroubek1,2, and J. A. Yarmoff1,*
1Department of Physics, University of California, Riverside, California 92521, USA
2Institute of Radio Engineering and Electronics, Czech Academy of Sciences, Chaberská 57, 182 51, Prague 8, Czech Republic

Received 13 November 2003; published 25 May 2004

Charge state-resolved time-of-flight spectra were collected for 2.0 keV 23Na+ scattered from Au nanoclusters deposited on TiO2(110). The neutral fraction of Na scattered from metallic Au is low (∼3%), but it is surprisingly high (up to 50%) for small clusters. The results demonstrate that alkali ions couple to electronic states specific to the nanoclusters, and that the energy of the states is a function of the nanocluster size. This technique provides a new method for the spectroscopy of nanomaterials.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.216801
DOI:
10.1103/PhysRevLett.92.216801
PACS:
73.22.–f, 61.46.+w, 68.49.Sf, 73.90.+f

*Author to whom correspondence should be addressed.

Electronic address: yarmoff@ucr.edu

 
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