Electrochemical Characterization of the Alkaneselenol-Based SAMs on Au(111) Single Crystal Electrode

Abstract

The formation and behavior of self-assembled monolayers made of n-dodecaneselenol (DDSe) on Au(111) as a blocking dielectric medium toward heterogeneous electron-transfer were assessed by electrochemical impedance spectroscopy. Microelectrode array theory was applied to study the growth kinetics of the self-assembled monolayer. The results show that adsorption from a n-dodecaneselenol solution in ethanol can be described using two different time constants. The monolayer is formed within the first minute after the electrode has been brought into contact with the deposition solution. The second step involves film reorganization and self-ordering, which can last for several hours. LA0203483

Electrochemical and spectroscopic study of C12H25X molecules adsorption on copper sheets, X (–SH, –S–S–, –SeH and –Se–Se–)

“…While the literature on the use of selenol functional groups to form SAMs is still controversial [50][51][52][53][54][55][56][57][58][59][60][61][62], our group recently demonstrated the significant effect of selenol (in terms of reduction efficiency and blocking properties) compared to thiol when reacted with electroplated copper [45]. Despite the presence of an initial oxide layer, n-dodecanethiol as well as n-dodecaneselenol molecules have shown to chemically adsorb on electroplated copper.…”

Exchange versus intercalation of n-dodecanethiol monolayers on copper in the presence of n-dodecaneselenol and vice versa

“…and more recently their selenol counterparts [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54], have been largely studied, and are attracting a large scientific interest which focuses on the understanding of the mechanisms taking place at the substrate/SAMs interface.…”

Electrochemical characterization of a 1,8-octanedithiol self-assembled monolayer (ODT-SAM) on a Au(111) single crystal electrode

“…In this sense, electrochemical impedance spectroscopy is particularly valuable for pinhole characterization because the effects of solution resistance, double-layer charging and currents due to diffusion or to other processes occurring in the SAM can be separated [37,38]. This approximation has then been used to characterized the pinhole size and distribution together with the surface coverage of different SAMs [32,37,[39][40][41][42][43].…”