ISSN:
1040-0397
Keywords:
Electrochemical quartz crystal microbalance
;
Cyclic voltammetry
;
Copper electrodeposition
;
Copper electrodissolution
;
Silver electrodeposition
;
Silver electrodissolution
;
Gold/quartz electrode
;
Microweighing
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The design and characteristics of a stationary, compact holder for an electrochemical quartz crystal microbalance (EQCM) are presented. A Au/quartz crystal oscillator is vertically mounted in a polytetrafluoroethylene body of the holder. The crystal is sealed with an O-ring and is easily accessible for change. The performance of the holder was tested under cyclic voltammetry (CV) conditions with the Ag+ /Ag and Cu+ /Cu electrodeposition/electrodissolution processes. Frequency changes due to mass changes of the Au/quartz electrode were correlated with CV parameters. The holder was calibrated for a 5 MHz crystal oscillator by means of CV anodic stripping of silver. The mass sensitivity was 19.5 ± 0.1 ng Hz-1 cm-2. The concentration sensitivity was 14.2 ± 0.2 μM Hz-1 cm-2 at a potential scan rate of 0.01 V s-1 and 23.7 ± 0.3 μM Hz-1 cm-2 at a scan rate of 0.02 V s-1 for a potential of scan reversal which was 250 mV more negative than the electrodeposition peak potential.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140050305
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