The self assembled monolayer(SAM) of 11 mercaptoundecanoic acid [HS(CH 2) 10 COOH] was formed on a gold electrode and the effect of the charge of end group on the electrochemical response of Fe(CN) 3- 6 at the SAM mod...
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The self assembled monolayer(SAM) of 11 mercaptoundecanoic acid [HS(CH 2) 10 COOH] was formed on a gold electrode and the effect of the charge of end group on the electrochemical response of Fe(CN) 3- 6 at the SAM modified electrode was studied by cyclic voltammetry. At high pH, when the —COOH groups are dissociated, the current of Fe(CN) 3- 6 is suppressed; as the solution pH is lowered, the current of Fe(CN) 3- 6 increases. The electrochemical titration curve was obtained by correlating the currents of Fe(CN) 3- 6 to the different pH values of electrolyte, from which the surface p K a was obtained to be 3.0±0.2. Furthermore, the reason of small p K a value was explained using SAMs of different surface coverage.
A composite polymer electrolyte of Polyethylene oxide (PEO) LiClO 4 containing fine Al 2O 3 particles was studied by using differential scanning calorimetry, infrared spectroscopy and electrochemical impedance spectro...
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A composite polymer electrolyte of Polyethylene oxide (PEO) LiClO 4 containing fine Al 2O 3 particles was studied by using differential scanning calorimetry, infrared spectroscopy and electrochemical impedance spectroscopy. Compared with the polymer electrolyte without Al 2O 3 particles, the glass transition temperature and the degree of crystallinity were decreased, and the room temperature conductivity of PEO LiClO 4 Al 2O 3 composite polymer electrolyte was considerably enhanced. Moreover, the equivalent circuits and the effect of dc potential on impedance spectroscopy were discussed.
The preparation and cyclic voltammetric behaviors of self assembled monolayers(SAMs) containing electroactive viologen group have been investigated. neatment of this viologenSAM with solutions of alkanethiols results ...
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The preparation and cyclic voltammetric behaviors of self assembled monolayers(SAMs) containing electroactive viologen group have been investigated. neatment of this viologenSAM with solutions of alkanethiols results in replacing the electroactive thiol, shifting negativelyits formal potentials and decreasing its heterogeneous electron transfer constants along with theimmersion time. The aim of the work is to understand the exchange regularity of the mired SAMson gold electrode surfaCe.
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