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Ehahoun H, Gabrielli C, Keddam M, et al. Performances and limits of a parallel oscillator for electrochemical quartz crystal microbalances. Anal Chem. 2002;74(5):1119-27doi: 10.1021/ac010883s.
Ehahoun, H., Gabrielli, C., Keddam, M., Perrot, H., & Rousseau, P. (2002). Performances and limits of a parallel oscillator for electrochemical quartz crystal microbalances. Analytical chemistry, 74(5), 1119-27. https://doi.org/10.1021/ac010883s
Ehahoun, Hervé, et al. "Performances and limits of a parallel oscillator for electrochemical quartz crystal microbalances." Analytical chemistry vol. 74,5 (2002): 1119-27. doi: https://doi.org/10.1021/ac010883s
Ehahoun H, Gabrielli C, Keddam M, Perrot H, Rousseau P. Performances and limits of a parallel oscillator for electrochemical quartz crystal microbalances. Anal Chem. 2002 Mar 01;74(5):1119-27. doi: 10.1021/ac010883s. PMID: 11924973.
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Anal Chem. 2002 Mar 01;74(5):1119-27. doi: 10.1021/ac010883s.

Performances and limits of a parallel oscillator for electrochemical quartz crystal microbalances.

Analytical chemistry

Hervé Ehahoun, Claude Gabrielli, Michel Keddam, Hubert Perrot, Philippe Rousseau

Affiliations

  1. UPR15 du CNRS, Physique des Liquides et Electrochimie, Université Pierre et Marie Curie, Paris, France.

PMID: 11924973 DOI: 10.1021/ac010883s

Abstract

This paper describes a driving circuit for an electrochemical quartz crystal microbalance (EQCM) adapted to a wide range of applications. The oscillator is a Miller-type parallel oscillator using an operational transconductance amplifier (OTA). A theoretical study of the oscillating circuit led to the analytical expression of the microbalance frequency as well as to an overestimation of the error on the mass measurement. The reliability of the EQCM was then experimentally verified through electrochemical copper deposition and dissolution. The limit of operation of the EQCM was also investigated, both analytically and experimentally. This work shows that parallel oscillators using few electronic components allow a very reliable EQCM to be obtained for mass measurements on metallic films, even if they are highly damped.

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