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Current Topics in Electrochemistry   Volumes    Volume 17 
Comparison of sensitivity constants of an electrochemical quartz crystal microbalance determined by potentiostatic deposition of Tl, Pb, Ag and Cu films
A.-L. Donjuan-Medrano, A. Montes-Rojas
Pages: 75 - 85
Number of pages: 11
Current Topics in Electrochemistry
Volume 17 

Copyright © 2012 Research Trends. All rights reserved

In this paper, the sensitivity constant (Cf) of an electrochemical quartz crystal microbalance (EQCM) is determined through a calibration procedure using potentiostatic electrodeposition of Tl, Pb, Ag and Cu films onto a gold electrode. In the literature some researchers have proposed the use for example of thallium or lead films on gold electrodes to obtain the sensitivity constant for calibration and to keep these electrodes reusable. However, it is not clear if with these metals the Cf values are reliable, given the fact that generally silver or Cu films are employed for this purpose. One of the most significant results reached in this work was that Cf values obtained with Tl and Pb films are dependent on both the imposed potential and the thickness of deposits. In addition, the Cf values obtained with these metals were found to be very close to the theoretical value as those obtained with silver films.
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