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Simple procedure for the fabrication of silver/silver chloride potentiometric electrodes with micrometre and smaller dimensions: application to scanning electrochemical microscopy
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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 0003-2654.
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Abstract
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 | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Journal or Publication Title: | ANALYST | ||||
Publisher: | ROYAL SOC CHEMISTRY | ||||
ISSN: | 0003-2654 | ||||
Official Date: | 2000 | ||||
Dates: |
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Volume: | 125 | ||||
Number: | 5 | ||||
Number of Pages: | 5 | ||||
Page Range: | pp. 889-893 | ||||
Publication Status: | Published |
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