Simple procedure for the fabrication of silver/silver chloride potentiometric electrodes with micrometre and smaller dimensions: application to scanning electrochemical microscopy
UNSPECIFIED. (2000) Simple procedure for the fabrication of silver/silver chloride potentiometric electrodes with micrometre and smaller dimensions: application to scanning electrochemical microscopy. ANALYST, 125 (5). pp. 889-893. ISSN 0003-2654Full text not available from this repository.
A simple method is described for the fabrication of silver/silver chloride electrodes with micrometre and smaller dimensions. The electrodes are constructed by etching a silver wire to a fine point and then coating with an electrophoretically-deposited paint, which is subsequently heat-cured to insulate all but the very end of the tip. These electrodes have effective radii in the 50 nm to 1 mu m range (assuming a hemispherical geometry), as determined by steady-state linear sweep voltammetry. After depositing AgCl on the Ag surface, by anodic oxidation in aqueous KCl solution, the electrodes exhibit Nernstian behaviour to chloride ions, in potentiometric measurements, over a concentration range of 10(-4) to at least 10(-1) mol dm(-3). These electrodes are shown to be particularly promising as scanning electrochemical microscopy (SECM) probes for imaging local chloride concentrations.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||ANALYST|
|Publisher:||ROYAL SOC CHEMISTRY|
|Number of Pages:||5|
|Page Range:||pp. 889-893|
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