Control analysis of the tunable phononic crystal with electrorheological material

Yeh, Jui‐Feng

doi:10.1016/j.physb.2007.06.030

Cited by 87 publications

(41 citation statements)

References 22 publications

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“…Tunability may be achieved by changing the geometry of the inclusions [50] or by varying the elastic characteristics of the constitutive materials through application of contact and noncontact external stimuli [51]. For instance, some authors have proposed the use of electrorheological materials in conjunction with application of an external electric field [52]. Some authors have considered the effect of temperature on the elastic moduli [53,54].…”

Section: Tunable Structuresmentioning

confidence: 99%

Introduction to Phononic Crystals and Acoustic Metamaterials

Deymier

2012

Acoustic Metamaterials and Phononic Crystals

109

138

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The objective of this chapter is to introduce the broad subject of phononic crystals and acoustic metamaterials. From a historical point of view, we have tried to refer to some of the seminal contributions that have made the field. This introduction is not an exhaustive review of the literature. However, we are painting in broad strokes a picture that reflects the biased perception of this field by the authors and coauthors of the various chapters of this book. Properties of Phononic Crystals and Acoustic MetamaterialsThe field of phononic crystals (PCs) and acoustic metamaterials emerged over the past two decades. These materials are composite structures designed to tailor elastic wave dispersion (i.e., band structure) through Bragg's scattering or local resonances to achieve a range of spectral (o-space), wave vector (k-space), and phase (f-space) properties.

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Section: Tunable Structuresmentioning

confidence: 99%

Introduction to Phononic Crystals and Acoustic Metamaterials

Deymier

2012

Acoustic Metamaterials and Phononic Crystals

109

138

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show abstract

“…Like their optical counterparts, photonic crystals, these crystals enable the configuration of their working frequency by fine-tuning the geometry and dimensions of the structure. Some authors have even worked in frequency control strategies by means of using materials with very interesting magnetoelastic and electrorheological properties [1][2][3][4].…”

Section: Introductionmentioning

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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“…More specifically, modifying the contrast in material parameters of a crystal, or changing the physical arrangement of components, manifests in the transmission spectrum and band structure to show the effects on transient sound. Active sonic structures with applied static electric fields, [14][15][16] magnetically, [17][18][19] mechanically 20,21 and recently with infrared radiation 22 have been reported. Most of these active sonic structures are in physical contact with the actuating source.…”

Section: Introductionmentioning

confidence: 99%

Radio-frequency actuated polymer-based phononic meta-materials for control of ultrasonic waves

Walker

Wang²,

Neogi

2017

NPG Asia Mater

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Radio-frequency (RF) control of an ultrasonic phononic crystal was achieved by encapsulating it in a composite of high k-10% KF-doped BaTiO 3 dielectric nanoparticles with poly(N-isopropylacrylamide) (PNIPAm)-based hydrogel. The combination of the nanoparticles and hydrogel produced a composite with elastic properties susceptible to RF actuation. The novel acoustic meta-material enables the regulation of sound waves by electromagnetic waves, which is not possible in a conventional medium as elasto-mechanical waves, and electromagnetic waves do not directly couple. Compared with light waves, radio waves can penetrate deeper into bulk structures and enable the control of propagation of ultrasonic waves through a macroscale phononic crystal. An RF antenna emitting at 318.6 and 422.5 kHz was used to modulate the device in water and ambient air, respectively. An increased transparency of the ultrasonic wave in the material was observed due to an increase in the bandwidth of the modulated device exceeding 8 kHz with a 30-fold increase in the signal modulation at select frequencies. The radio waves induced changes in the transmission and demonstrated the control of ultrasound with applied RF. The synthetic acoustic properties in the resultant meta-material device were actively manipulated through the interaction of electromagnetic waves with the material.

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Control analysis of the tunable phononic crystal with electrorheological material

Cited by 87 publications

References 22 publications

Introduction to Phononic Crystals and Acoustic Metamaterials

Introduction to Phononic Crystals and Acoustic Metamaterials

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

Radio-frequency actuated polymer-based phononic meta-materials for control of ultrasonic waves

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