Artículos
Título:
Electrochemical STM investigation of 1,8-octanedithiol monolayers on Au(111). Experimental and theoretical study
Autor/es:
M. J. ESPLANDIU, M. L. CAROT, F. P. COMETTO, V. A. MACAGNO, E. M. PATRITO
Referencias:
Lugar: Amsterdam; Año: 2006 vol. 600 p. 155 - 155
Resumen:
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The surface structure of Au(111) electrodes covered by 1,8-octanedithiol self-assembled monolayers (SAMs) was
studied with in situ scanning tunnelling microscopy (STM) as a function of the electrode potential in acidic and alkaline
electrolytes. We investigated the correlation between the dynamics of the SAM and the underlying gold atoms during the
reductive desorption and oxidative readsorption processes. The reductive desorption of 1,8-octanedithiol is characterized
by a transition from a compact monolayer with an upright molecular configuration to a striped phase with flat lying
dithiol molecules, whereas during the oxidative readsorption process the surface first becomes increasingly covered by
the striped phase until the transition to the compact phase occurs. We also considered under equivalent conditions