Pesticide detection using a lateral field excited acoustic wave sensor

Hu, Yihe; Pinkham, W.; French, L.A.; Frankel, D.; Vetelino, J.F.

doi:10.1016/j.snb.2004.11.043

Cited by 45 publications

(16 citation statements)

References 10 publications

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“…The substitution of ( 8) into (10) results in four linear homogeneous equations for A 1 − A 4 . For nontrivial solutions, the determinant of the coefficient matrix of the equations should be zero.…”

Section: Dispersion Property and Frequency Spectramentioning

confidence: 99%

“…Conventional piezoelectric bulk acoustic wave sensors usually employ quartz crystal plate stimulated by thickness electric field (containing electrodes on the upper and lower surfaces) [1][2][3][4][5][6][7][8]. Compared with the thickness-field-excitation (TFE), the lateral-field-excitation (LFE) (with electrodes on the same surface) has the advantages of higher quality factors and frequency stabilities, and lower crystal aging rates [9][10][11][12][13]. Sensors applied in high-temperature occasions are in increasing demand, such as gas detection, solid state particle detection and film thickness monitoring in coating systems, etc.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Resonance Analysis of Piezoelectric Bulk Acoustic Wave Devices Based on YCOB Crystals with Monoclinic Symmetry Excited by Lateral Electric Fields

et al. 2022

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The monoclinic YCOB crystal still maintains good piezoelectric properties at 800 °C; thus, it has a good application prospect in high-temperature piezoelectric acoustic wave sensors. However, due to the lower symmetry compared crystals in trigonal and tetragonal systems, the exciting characteristics of piezoelectric plates based on monoclinic YCOB crystals are more complicated. The vibration analysis model of lateral-field-excitation (LFE) devices based on monoclinic crystals is scarce; thus, the coupling relationships between different vibration modes and energy-trapping characteristics of the devices are unclear, which hinders the optimal design of devices. In this paper, by using Mindlin plate theory, the high-frequency vibrations of piezoelectric resonators based on monoclinic YCOB crystal plates excited by a lateral electric field are modeled and analyzed. The coupling relationships between the vibration modes of the device are clarified. The influences of the electrode width, electrode/plate mass ratio and electrode gap value on resonances and energy-trapping characteristics of the device are achieved. In addition, the effects of the structure parameters on the mass sensitivity of the monoclinic YCOB LFE devices are investigated, which are further verified by FEM simulations. The results are crucial to obtaining good resonance and sensing characteristics for LFE high-temperature piezoelectric sensors based on crystals with monoclinic symmetry.

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Section: Dispersion Property and Frequency Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resonance Analysis of Piezoelectric Bulk Acoustic Wave Devices Based on YCOB Crystals with Monoclinic Symmetry Excited by Lateral Electric Fields

et al. 2022

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“…Higher quality factor (Q-factor), superior frequency stability, and high durability have made LFE devices more suitable for sensing compared with conventional thickness field excitation (TFE) devices [8][9][10][11][12]. In addition, more effective data about analytes obtained by LFE sensors provide a valuable tool for sensing and the evaluation of reaction procedures in biochemical systems [13,14].…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Resonators Excited by Lateral Electric Fields Based on a LiTaO3 Single Crystal

et al. 2020

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In the present study, piezoelectric resonators under lateral field excitation (LFE) based on a LiTaO3 single crystal are modeled and analyzed. An electrically forced vibration study is employed to acquire the motional capacitance curve and vibration mode shapes. A finite element approach is utilized to investigate the influences of some basic parameters, such as the electrode/plate mass ratio, electrode gap, and electrode width on resonance characteristics. In addition, the design criteria for the gap and width of the electrode of the LiTaO3 LFE resonators are obtained by analyzing the effects of those parameters on vibration strain distributions. The obtained results are essential for designing LFE piezoelectric resonators by using a LiTaO3 single crystal.

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“…The gap distance is important because the resonator is a coupled resonator composed of two resonators. (8) The geometry is similar to that of a lateral field excited (LFE) sensor (16)(17)(18) . However, the gap distance differs by one order of magnitude (1-3.5 mm) compared with that of the ACR-type QCM (0.1 mm), and it has no sensing electrode on the other side; thus, the driving mechanism is not the same as that of the ACR-type QCM.…”

Section: Introductionmentioning

confidence: 99%

Electrode-separated Quartz Crystal Microbalance for Smart-sensor Mounting Application

2018

Sensors and Materials

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Quartz crystal microbalances (QCMs) have found applications as popular chemical and biological sensing tools. However, their current device geometry prevents their commercialization for industrial use. In this study, we propose a new disposable QCM sensor with an electrode only on the sensing side, making it suitable for sensor mounting. In this sensor system, the excitation electrode is positioned on a glass plate separate from the QCM. Such electrode configurations are suitable for sensor applications in flow cell systems in preference to common QCM systems because QCM mounting on the flow cell and the electrical interconnections between the QCM and the oscillation circuit are simple. The optimized configurations of the electrode diameter, separation distance, and orientation relative to the crystallographic x-axis of the plate are revealed for the first time. The proposed QCM can be applied to realize a disposable QCM-based biochip or hazardous gas sensor located inside a flow tube.

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Pesticide detection using a lateral field excited acoustic wave sensor

Cited by 45 publications

References 10 publications

Resonance Analysis of Piezoelectric Bulk Acoustic Wave Devices Based on YCOB Crystals with Monoclinic Symmetry Excited by Lateral Electric Fields

Resonance Analysis of Piezoelectric Bulk Acoustic Wave Devices Based on YCOB Crystals with Monoclinic Symmetry Excited by Lateral Electric Fields

Piezoelectric Resonators Excited by Lateral Electric Fields Based on a LiTaO3 Single Crystal

Electrode-separated Quartz Crystal Microbalance for Smart-sensor Mounting Application

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