OH radical degradation of blocking aryl layers on glassy carbon and gold electrodes leads to film thinning on glassy carbon and pinhole films on gold

@article{Kibena2013OHRD,
  title={OH radical degradation of blocking aryl layers on glassy carbon and gold electrodes leads to film thinning on glassy carbon and pinhole films on gold},
  author={Elo Kibena and Kaido Tammeveski and Leonard Matisen and Ulrich Hasse and Fritz Scholz},
  journal={Electrochemistry Communications},
  year={2013},
  volume={29},
  pages={33-36}
}

Figures from this paper

Electrocatalysis of oxygen reduction on glassy carbon electrodes modified with anthraquinone moieties
Anthraquinone groups were electrochemically grafted to glassy carbon (GC) electrodes via methylene linker to study the oxygen reduction reaction (ORR) in alkaline medium. Two different anthraquinone
Investigation of the antioxidative and radical scavenging impact of natural compounds in-vitro and on cell metabolism
TLDR
The work demonstrates the feasibility to use the electrochemical assay to sense ROS as well as to evaluate the radical scavenging activity of molecules, and demonstrates the in-vitro antioxidant activities demonstrated for the individual plant substances are not reliable to predict the cellular effects of the molecules.

References

SHOWING 1-10 OF 19 REFERENCES
Blocking properties of gold electrodes modified with 4-nitrophenyl and 4-decylphenyl groups
The electrochemical properties of Au electrodes grafted with 4-nitrophenyl and 4-decylphenyl groups have been studied. The electrografting of gold electrode surface with aryl groups was carried out
X-Ray photoelectron spectroscopy studies of graphite powder and multiwalled carbon nanotubes covalently modified with Fast Black K: evidence for a chemical release mechanism via electrochemical reduction
The development of new materials from which to construct controlled chemical-release systems has been an active area of research for the past four decades. Using X-ray photoelectron spectroscopy
Electrochemical modification of gold electrodes with azobenzene derivatives by diazonium reduction.
TLDR
Electrochemical quartz crystal microbalance, ellipsometry and atomic force microscopy investigations reveal the formation of multilayer films and it can be concluded that the FBK film is less compact or presents more pinholes than the electrografted GBC layer.
Hydroxyl radicals attack metallic gold.
TLDR
Surprise experimental results are reported showing that OHC radicals in Fenton s reagent quickly dissolve gold from a mechanically polished gold surface to lead to a much smoother, that is, chemically polished, surface.
Advances in Interfacial Design for Electrochemical Biosensors and Sensors: Aryl Diazonium Salts for Modifying Carbon and Metal Electrodes
A high degree of control over the modification of electrode surfaces is required for many sensing applications. This critical review briefly outlines some of the considerations for interfacial design
Distance dependence of electron transfer rates in bilayers of a ferrocene Langmuir-Blodgett monolayer and a self-assembled monolayer on gold
Bilayers consisting of a self-assembled alkanethiol monolayer of variable chain length and Langmuir-Blodgett monolayers of 16-ferrocenylhexadecanoic acid were fabricated on Au electrodes. The
Electrografting: a powerful method for surface modification.
TLDR
This critical review describes the methods that are used for electrografting, their mechanism, the formation and growth of the layers as well as their applications.
Selective knockout of gold active sites.
TLDR
This work indicates that the defect sites provide partially filled d-orbitals that stabilize freeradical intermediates in electrocatalysis and can be selectively knocked out by treatment with OH• radicals generated by Fenton's reagent.
...
...