The force needed to move an atom on a surface

Markus Ternes, Christopher P. Lutz, Cyrus F. Hirjibehedin, Franz J. Giessibl, Andreas J. Heinrich

Research output: Contribution to journalArticlepeer-review

347 Scopus citations

Abstract

Manipulation of individual atoms and molecules by scanning probe microscopy offers the ability of controlled assembly at the single-atom scale. However, the driving forces behind atomic manipulation have not yet been measured. We used an atomic force microscope to measure the vertical and lateral forces exerted on individual adsorbed atoms or molecules by the probe tip. We found that the force that it takes to move an atom depends strongly on the adsorbate and the surface. Our results indicate that for moving metal atoms on metal surfaces, the lateral force component plays the dominant role. Furthermore, measuring spatial maps of the forces during manipulation yielded the full potential energy landscape of the tip-sample interaction.

Original languageEnglish
Pages (from-to)1066-1069
Number of pages4
JournalScience
Volume319
Issue number5866
DOIs
StatePublished - 22 Feb 2008

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