Electrochemical formation and electron transfer through self-assembled monolayers of 4-mercaptophenol on mercury

Mixed self-assembled monolayers of 2-mercaptobenzimidazole and 2-mercaptobenzimidazole-5-sulfonate: Determination and control of the surface composition

“…As already demonstrated, SAMs formed of small aromatic molecules are more efficient toward ET than alkanethiols of similar size [6], and we may therefore expect a poor inhibition of the electron transfer by a MBI monolayer. A recent study of Yang and Khoo [7] confirms this hypothesis, and has shown that in acetate buffer solution at pH 5 on polycrystalline gold electrode, the electron transfer of the [Fe(CN) 6 ] 3À/4À and [Ru(NH 3 ) 6 ] 3+/2+ couples is more reversible in the presence of the MBI monolayer than in its absence.…”

“…KClO 4 and LiClO 4 (Merck, Pro Analysi) were recrystallized in Milli-Q water. 6 ]Cl 3 (Alfa Aesar), KOH (Carlo Erba) and CaCl 2 (Merck) were of analytical grade and used as received. The purity of the gold (Johnson Matthey) used for the working and counter electrode was 99.9985%.…”

“…Among the wide variety of SAMs, those having a terminal charged group are of great interest and were used as model surfaces for studying double-layer structure [3][4][5], or for electron transfer (ET) studies [6][7][8]. The specific adsorption of proteins is known to be very sensitive to the presence of charge on the surface.…”

A study of adsorption kinetics of alkanethiol and alkanedithiol on gold using cyclic voltammetry

“…Our result is less than the results in literature. For example, using plot of lnks against film thickness, Ramirez [46] got the value of fJ 0.53/A for mercaptophenol system, Protsailo [44] got the value of fJ 0.83/ A for [Ru(NH 3 )6] 3+/2+ alkanethiol system. The difference may come from different measurement and adsorption model.…”

Properties of thiolate monolayers formed on different amalgam electrodes

“…In this method, accumulation of the thiosubstance at the electrode surface is performed by oxidation of the electrode material at a suitable potential, and the created metal cations bind covalently with sulfur. A similar approach was also used for deposition of a compact monolayer of thiols on gold [52][53][54], silver [55] and mercury [56][57][58][59]. Though the creation of a thiol monolayer is most frequently accomplished using the self-assembled method, both the contact angle and the infrared reflection spectroscopic characterization of the complete monolayers show qualitative similarities of the electrodeposited and the self-assembled monolayers [52].…”