Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
111 (1999), S. 9457-9460
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The dynamics of adsorbed sulfur on Au(111) at the metal/electrolyte interface has been followed by scanning tunneling microscopy. The increase in the negative surface charge density induces the transformation from rectangular S8 to a (square root of)3×(square root of)3 R30° lattice. This process involves desorption of sulfur atoms as HS− ions, formation of rectangular tetramer intermediates, and displacement of atoms from the intermediate to nearest hollow sites. A further increase in the negative charge density produces desorption of the (square root of)3×(square root of)3 R30° lattice from terraces. Sulfur atoms remain strongly bonded to step edges. Experimental data provide an estimation of the excess of binding energy close to step edges. Correlation between S and thiol adlayer desorption data has been found. © 1999 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.480331
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