Fundamentals of Piezoelectricity

Arnau, Antonio; Soares, David Mendez

doi:10.1007/978-3-540-77508-9_1

Cited by 70 publications

(103 citation statements)

References 8 publications

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“…One big difference between phononic crystals and other resonant sensors, like the quartz crystal microbalance, QCM, is that PnC allows to perform an evaluation of the volumetric properties of liquid samples and not of properties of the liquid at an interface. PnC sensors combine the characteristics of resonant sensors and ultrasonic sensors by using the propagation of acoustic waves through liquids and measuring changes in the frequency response of the system to determine its properties [30,31]. This paper reports the design, manufacture, and evaluation of a fully-disposable multi-layered phononic crystal liquid sensor with symmetry reduction and a resonant cavity that can be used in applications that require the measurement of small liquid samples in the field.…”

Section: (B)mentioning

confidence: 99%

Fully-disposable multilayered phononic crystal liquid sensor with symmetry reduction and a resonant cavity

et al. 2017

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. Fullydisposable multilayered phononic crystal liquid sensor with symmetry reduction and a resonant cavity. Measurement: Journal of the International Measurement Confederation, 102, pp. 20-25. doi: 10.1016Confederation, 102, pp. 20-25. doi: 10. /j.measurement.2017 This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent b s t r a c tPhononic crystals are artificial structures with unique capabilities to control the transmission of acoustic waves. These novel periodic composite structures bring new possibilities for developing a fundamentally new sensor principle that combines features of both ultrasonic and resonant sensors. This paper reports the design, fabrication and evaluation of a phononic crystal sensor for biomedical applications, especially for its implementation in point of care testing technologies. The key feature of the sensor system is a fully-disposable multi-layered phononic crystal liquid sensor element with symmetry reduction and a resonant cavity. The phononic crystal structure consists of eleven layers with high acoustic impedance mismatch. A defect mode was utilized in order to generate a well-defined transmission peak inside the bandgap that can be used as a measure. The design of the structures has been optimized with simulations using a transmission line model. Experimental realizations were performed to evaluate the frequency response of the designed sensor using different liquid analytes. The frequency of the characteristic transmission peaks showed to be dependent on the properties of the analytes used in the experiments. Multi-layered phononic crystal sensors can be used in applications, like point of care testing, where the on-line measurement of small liquid samples is required.

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Section: (B)mentioning

confidence: 99%

Fully-disposable multilayered phononic crystal liquid sensor with symmetry reduction and a resonant cavity

et al. 2017

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“…It is observed that in the LFR, the phase velocities of all waves decrease with an increase in porosity while they increase monotonically by a very small amount with porosity in the HFR. The phase velocities of qP 1 , qS 1 and qS 2 waves in the LFR become almost constant when the porosity is greater than 60%. However, phase velocity of qP 2 wave decreases even when the porosity is greater than 60%.…”

Section: Numerical Discussionmentioning

confidence: 93%

“…In recent years, piezoelectric materials have been integrated with structural systems to form a class of smart structures and embedded as layers or fibers into multifunctional composites. The survey of literature can be found in many related texts and books (Arnau, 2008;Auld, 1973). A short survey of the piezoelectric wave propagation and resonance were described by Auld (1981).…”

Section: Introductionmentioning

confidence: 99%

Effects of piezoelectricity on bulk waves in monoclinic poro-elastic materials

Gupta¹,

Vashishth²

2016

jtam

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Piezoelectric materials are materials which produce electric field when stress is applied and get strained when electric field is applied. Piezoelectric materials are acting as very important functional components in sonar projectors, fluid monitors, pulse generators and surface acoustic wave devices. Wave propagation in porous piezoelectric material having crystal symmetry 2 is studied analytically. The Christoffel equation is derived. The phase velocities of propagation of all these waves are described in terms of complex wave velocities. The effects of phase direction, porosity, wave frequency and piezoelectric interaction on the phase velocities are studied numerically for a particular model.

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“…One of the most promising alternative measurement modality that has not been yet proved in phononic crystals is the transient time, especially when sensing liquids. [19,20] The present article introduces a new type of measurement for phononic crystals that uses the transient response to detect changes in the properties of an analyte.…”

Section: Introductionmentioning

confidence: 99%

Use of Transient Time Response as a Measure to Characterize Phononic Crystal Sensors

Arango¹,

Sánchez²,

Torres³

et al. 2018

Preprint

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Phononic crystals are periodic composite structures with specific resonant features that are gaining strength in the field as liquid sensors. The introduction of a structural defect in an otherwise periodic regular arrangement can generate a resonant mode, also called defect mode, inside the characteristic band gaps of phononic crystals. The morphology, as well as the frequency in which these defect modes appear, can give useful information on the composition and properties of an analyte. Currently, only gain, and frequency measurements are performed using phononic crystal sensors. Other measurements like the transient response have been implemented in resonant sensors such as quartz microbalances showing great results and proving to be a great complimentary measure to the gain and frequency measurements. In the present paper, a study of the feasibility of using the transient response as a measure to acquire additional information about the analyte is presented. Theoretical studies using the transmission line model were realized to show the impact of variations in the concentration of an analyte, in this case, lithium carbonate solutions, in the transient time of the system. Experimental realizations were also performed showing that the proposed measurement scheme presents significant changes in the resulting data, indicating the potential use of this measure in phononic crystal sensors. This proposed measure could be implemented as a stand-alone measure or as a compliment to current sensing modalities.

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Fundamentals of Piezoelectricity

Cited by 70 publications

References 8 publications

Fully-disposable multilayered phononic crystal liquid sensor with symmetry reduction and a resonant cavity

Fully-disposable multilayered phononic crystal liquid sensor with symmetry reduction and a resonant cavity

Effects of piezoelectricity on bulk waves in monoclinic poro-elastic materials

Use of Transient Time Response as a Measure to Characterize Phononic Crystal Sensors

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