Adsorption of a quaternary ammonium surfactant on Au(1 0 0)

The influence of surface crystallography on the interfacial behaviour of tetrabutylammonium cations at Au(100) and Au(111) electrodes

“…Hence, a more positive value of potential of R 0 peak than of R 0 E one (42 mV) can produce an additional positive charge what, at least partly, explains the greater charge under the former peak. Incidentally, similar difference between charges under reconstruction peaks recorded in solution containing quaternary cationic surfactants and supporting electrolyte alone can be seen in Vivek and Burgess work [7]. We are aware of the fact that this explanation calls for some structure sensitive e.g.…”

“…To pursue the investigation, it seemed interesting to check also the influence of the structure of gold electrode surface on the behaviour of tetraalkylammonium cations similarly as had been performed for quaternary cationic surfactants e.g. octyltrimethylammonium triflate [7][8][9]. To achieve this goal we chose Au(1 1 1) and Au(1 0 0) single-crystal electrodes and tetrabutylammonium perchlorate (TBAP).…”

Differential capacity and chronocoulometry studies of a quaternary ammonium surfactant adsorbed on Au(111)

“…Octyltrimethylammonium (OTA) trifluoromethanesulfonate (triflate, Tf) was synthesized by methylation of N,N‐dimethyloctylamine (purity 95%, Aldrich) using methyl trifluoromethanesulfonate (purity > 98%, Aldrich). Details of the synthesis are published elsewhere . Crude OTATf was recrystallized first from a hexane–ethyl acetate mixture, then from water and finally dried under vacuum.…”

“…The goal of this work is the quantitative evaluation of the potential dependent structural transformations of octyltrimethylammonium triflate (OTATf) at the Au(111)/electrolyte interface. The adsorption of the decyl analogue of this surfactant (DeTATf) has been reported on Au(111), and an electrochemical evaluation of OTATf adsorption on Au(100) has also been previously described . In our previous work on Au(100), the focus was on the effect of OTATf adsorption on the surface reconstruction of the electrode, and an evaluation of the surfactant adsorption on both reconstructed and unreconstructed surfaces was provided .…”

“…The adsorption of the decyl analogue of this surfactant (DeTATf) has been reported on Au(111), and an electrochemical evaluation of OTATf adsorption on Au(100) has also been previously described . In our previous work on Au(100), the focus was on the effect of OTATf adsorption on the surface reconstruction of the electrode, and an evaluation of the surfactant adsorption on both reconstructed and unreconstructed surfaces was provided . A detailed analysis of the surfactant adsorption structure was precluded because of the difficulties arising from potential induced surface restructuring .…”