Impedance analysis of the thickness shear mode resonator for organic vapour sensing

Holloway, Alan; Nabok, Alexei; Thompson, M. A.; Ray, Asim K.; Wilkop, Thomas

doi:10.1016/j.snb.2003.12.002

Cited by 45 publications

(28 citation statements)

References 21 publications

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“…The shear wave propagates through the sensing layer at the top of the crystal and into the liquid and can be characterized from storage and dissipation processes. The measured electrical impedance of the sensor, which is related to the complex acoustic impedance, is analyzed using Butterworth-Van-Dyke (BVD) equivalent circuit model [18,23]. As a result the series resonance frequency f S and motional resistance R m are determined.…”

Section: Equipments and Measuring Proceduresmentioning

confidence: 99%

“…The analysis of the changes of motional resistance vs. frequency changes could therefore help in understanding the viscoelastic contribution into measuring values [18,[31][32][33]. According to Eq.…”

Section: The Acoustic Properties Of Sam Of Calixarenes At Presence Ofmentioning

confidence: 99%

“…This approach has been exploited in the study of interaction of organic solvent vapors with the TSM resonator coated by calixarene film. It has been shown, that hexane and toluene can be discriminated based on their effect on viscoelastic properties of the calixarene layer [18]. In papers mentioned above the surface of TSM transducers has been modified by multilayers of calixarenes using spin coating or LB deposition.…”

Section: Introductionmentioning

confidence: 99%

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Section: Equipments and Measuring Proceduresmentioning

confidence: 99%

Section: The Acoustic Properties Of Sam Of Calixarenes At Presence Ofmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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et al. 2010

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“…Each parameter of the QCM's Butterworth-Van-Dyke (BVD) equivalent circuit model (shown in Fig. 1) represents a physical property of the quartz and its coating [2] . On the other hand, oscillators are always a good choice for QCM sensors with the merits of low cost, continuous measurement and integration capability [3] .…”

Section: Introductionmentioning

confidence: 99%

“…With the conductance and admittance spectra, the parameters can be estimated. A highly accurate and reliable non-linear Levenberg-Marquadt least squares fitting algorithm has been used for estimating the parameters, however the algorithm suffers from the defects of requiring large space and time [2,4] . Fig.…”

Section: Introductionmentioning

confidence: 99%

Computation of Equivalent Circuit Parameters of QCM and Evaluation of the Measurement Uncertainties

Zheng¹,

Meng²,

Wang³

et al. 2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract. This paper presents an approach of computing the parameters of quartz crystal microbalance (QCM) equivalent circuit model using the least squares algorithm in MATLAB. Modification of the measured data's order in the least squares algorithm was implemented so that the precision was improved. Compared with nonlinear least squares algorithm, the computation method in this paper was faster and simpler with little lower accuracy. Moreover, Monte Carlo Method was utilized to evaluate the measurement uncertainties. An experiment on the temperature response of QCM's equivalent circuit parameters was performed to show that the proposed approach was accurate and fast. The measurement errors are less than 0.6%.

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Toluene‐vapor sorption of chemically modified methyl methacrylate‐co‐chloromethyl styrene copolymers with N,N,‐dimethyl‐1,3‐propanediamine measured with a quartz crystal microbalance

Matsuguchi

Kagemoto

2008

J of Applied Polymer Sci

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ABSTRACT:The sorption properties of toluene vapor were measured for methyl methacrylate (MMA)-co-chloromethyl styrene (CMSt) copolymers chemically modified with N,N-dimethyl-1,3-propanediamine (DMPDA) to develop a novel quartz crystal microbalance toluene-vapor sensor coating. The influence of the structure of the comonomer, the composition of the copolymer, and the film thickness on the toluene sorption properties were investigated. The modified MMA-CMSt copolymers were capable of large, fast, and reversible sorption versus the modified styrene-CMSt copolymers. The largest sorption capacity was obtained for MMA-CMSt-DMPDA with a 96 mol % CMSt concentration. These behaviors were explained by a combination of the plasticization of the copolymers by the introduction of bulky DMPDA at lower CMSt concentrations and the formation of a loosely crosslinked structure at higher CMSt concentrations.

show abstract

Impedance analysis of the thickness shear mode resonator for organic vapour sensing

Cited by 45 publications

References 21 publications

High sensitive calixarene-based sensor for detection of dopamine by electrochemical and acoustic methods

High sensitive calixarene-based sensor for detection of dopamine by electrochemical and acoustic methods

Computation of Equivalent Circuit Parameters of QCM and Evaluation of the Measurement Uncertainties

Toluene‐vapor sorption of chemically modified methyl methacrylate‐co‐chloromethyl styrene copolymers with N,N,‐dimethyl‐1,3‐propanediamine measured with a quartz crystal microbalance

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