Two-component mixed self-assembled monolayers (SAMs) composed of 2-mercapto
-5-methyl-1,3,4-oxadiazole (MMO) and 1-dodecanethiol (C12SH) in various mol
ar percentages were prepared on gold surfaces by self-assembly. X-ray photo
electron spectroscopy (XPS) and wettability results gave evidence that the
coverage of MMO was controlled by the composition of MMO in the assembling
solution. The monolayer coverage and apparent rate constant of the redox ac
tive probes in solution of different molar ratios of mixed SAMs could be ca
lculated using impedance measurements. The cyclic voltammetry reveals that
the probes are selectively passed through the mixed SAMs depending upon the
ir properties.