Reactivity of 1,8-octanedithiol monolayers on Au(111): Experimental and theoretical investigation

M. L. CAROT, M. J. ESPLANDIU, F. P. COMETTO, E. M. PATRITO, V. A. MACAGNO

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

Elsevier

Lugar: Amsterdam; Año: 2005 vol. 579 p. 13 - 13

0022-0728

font face="AdvPSTim" size="1"> The reactivity of 1,8-octanedithiol/Au(1 11) self-assembled monolayers (SAMs) formed by the immersion method was investigated by means of cyclic voltammetry (CV), scanning tunneling microscopy (STM), electrochemical impedance spectroscopy (EIS) and quantum mechanical calculations. The potential of the reductive desorption process for the dithiol is 99 mV more negative than for 1-octanethiol indicating a higher stability of dithiol monolayers. A reduction charge of -109 ìC/cm2 was obtained for the dithiol which is to be compared to the reductive desorption charge of -83