A Novel Method for Electrochemical Dual Quartz Crystal Impedance Analysis

Abstract

Abstract: Anovel method for simultaneous impedance analyses of two resonating piezoelectric quartz crystals is proposed via the admittance measurements of two crystals in parallel and then nonlinear admittance fitting to an equivalent circuit of two Butterworth-Van Dyke circuits in parallel.Series of sucrose aqueous solutions and copper electro-deposition/stripping in a NH₃-(NH₄)₂SO₄buffer were used to test this method, giving that the impedance parameters of each of the parallel crystals reflecting the solution density-viscosity effect or the mass effect were very close to those measured with each single crystal alone.Also, simultaneous impedance measurements at the working and counter electrodes were carried out and discussed.

Key words: Dual quartz crystals, Electroacoustic impedance analysis, Electrochemistry

CLC Number:

O657.1

TrendMD:

XIE Qing-Ji, ZHANG You-Yu, YANG Xiao-Hui, LI Meng, HE Hong-Mei, YAO Shou-Zhuo . A Novel Method for Electrochemical Dual Quartz Crystal Impedance Analysis[J]. Chem. J. Chinese Universities, 2003, 24(10): 1790.

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A Novel Method for Electrochemical Dual Quartz Crystal Impedance Analysis

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