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Atomic structure of Cu adlayers on Au(100) and Au(111) electrodes observed by in situ scanning tunneling microscopy

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Nichols,  R. J.
Fritz Haber Institute, Max Planck Society;

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Kolb,  Dieter M.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Magnussen, O., Hotlos, J., Nichols, R. J., Kolb, D. M., & Behm, R. J. (1990). Atomic structure of Cu adlayers on Au(100) and Au(111) electrodes observed by in situ scanning tunneling microscopy. Physical Review Letters, 64(24), 2929-2932. doi:10.1103/PhysRevLett.64.2929.


Cite as: http://hdl.handle.net/21.11116/0000-0008-52FD-F
Abstract
The atomic structure of ordered Cu adsorbate layers on Au(111) and Au(100) electrode surfaces and of the clean substrates was resolved in scanning tunneling microscopy images taken in situ. For submonolayer coverages deposited from sulfuric acid solutions under potential control, various ordered structures were observed. The quasihexagonal arrangement of Cu atoms in these structures reflects increasingly repulsive interactions between closely spaced Cu adatoms. These structures differ from the pseudomorphic Cu adlayer formed under vacuum conditions, which demonstrates the structure-determining role of the coadsorbed anions.