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Originally published in Science Express on 22 August 2002
Science 13 September 2002:
Vol. 297. no. 5588, pp. 1853 - 1856
DOI: 10.1126/science.1075242
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Reports

Development of One-Dimensional Band Structure in Artificial Gold Chains

N. Nilius, T. M. Wallis,* W. Hodagger

The ability of a scanning tunneling microscope to manipulate single atoms is used to build well-defined gold chains on NiAl(110). The electronic properties of the one-dimensional chains are dominated by an unoccupied electron band, gradually developing from a single atomic orbital present in a gold atom. Spatially resolved conductance measurements along a 20-atom chain provide the dispersion relation, effective mass, and density of states of the free electron-like band. These experiments demonstrate a strategy for probing the interrelation between geometric structure, elemental composition, and electronic properties in metallic nanostructures.

Department of Physics and Astronomy and Department of Chemistry, University of California, Irvine, CA 92697-4575, USA.
*   On leave of absence from Department of Physics, Cornell University, Ithaca, NY 14853-2501, USA.

dagger    To whom correspondence should be addressed. E-mail: wilsonho{at}uci.edu

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