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Science 23 July 2004:
Vol. 305. no. 5683, pp. 493 - 495
DOI: 10.1126/science.1099557
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Reports

Controlling the Charge State of Individual Gold Adatoms

Jascha Repp,1* Gerhard Meyer,1 Fredrik E. Olsson,2 Mats Persson2

The nature and control of individual metal atoms on insulators are of great importance in emerging atomic-scale technologies. Individual gold atoms on an ultrathin insulating sodium chloride film supported by a copper surface exhibit two different charge states, which are stabilized by the large ionic polarizability of the film. The charge state and associated physical and chemical properties such as diffusion can be controlled by adding or removing a single electron to or from the adatom with a scanning tunneling microscope tip. The simple physical mechanism behind the charge bistability in this case suggests that this is a common phenomenon for adsorbates on polar insulating films.

1 IBM, Zurich Research Laboratory, CH-8803 Rüschlikon, Switzerland.
2 Department of Applied Physics, Chalmers/Göteborg University, S-41296, Göteborg, Sweden.

* To whom correspondence should be addressed. E-mail: jre{at}zurich.ibm.com

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Current-Induced Hydrogen Tautomerization and Conductance Switching of Naphthalocyanine Molecules.
P. Liljeroth, J. Repp, and G. Meyer (2007)
Science 317, 1203-1206
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Realization of a four-step molecular switch in scanning tunneling microscope manipulation of single chlorophyll-a molecules.
V. Iancu and S.-W. Hla (2006)
PNAS 103, 13718-13721
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Atomic-Scale Coupling of Photons to Single-Molecule Junctions.
S. W. Wu, N. Ogawa, and W. Ho (2006)
Science 312, 1362-1365
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Imaging bond formation between a gold atom and pentacene on an insulating surface..
J. Repp, G. Meyer, S. Paavilainen, F. E. Olsson, and M. Persson (2006)
Science 312, 1196-1199
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Molecular Electronics Special Feature: Scanning tunneling microscopy experiments on single molecular landers.
F. Moresco and A. Gourdon (2005)
PNAS 102, 8809-8814
   Abstract »    Full Text »    PDF »
Molecular Electronics Special Feature: Tunneling rates in electron transport through double-barrier molecular junctions in a scanning tunneling microscope.
G. V. Nazin, S. W. Wu, and W. Ho (2005)
PNAS 102, 8832-8837
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Science. ISSN 0036-8075 (print), 1095-9203 (online)