Focusing surface acoustic waves assisted electrochemical detector in microfluidics

Zheng, Tengfei; Liu, Yue; Xu, Chaoping; Lü, He‐Zuo; Wang, Chaohui

doi:10.1002/elps.201900315

Cited by 10 publications

(6 citation statements)

References 42 publications

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“…Recently, the application of the SAW device has been implemented in cellular biology research. Due to the advancement in visualising microparticles [99], researchers have relentlessly sought to harness acoustic waves as a tool to be used in live-cell studies. As compared to the SAW device used in telecommunication, a very high wave excitation up to several GHz ultrasonic range is employed.…”

Section: Discussionmentioning

confidence: 99%

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Current Development in Interdigital Transducer (IDT) Surface Acoustic Wave Devices for Live Cell In Vitro Studies: A Review

et al. 2021

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Acoustics have a wide range of uses, from noise-cancelling to ultrasonic imaging. There has been a surge in interest in developing acoustic-based approaches for biological and biomedical applications in the last decade. This review focused on the application of surface acoustic waves (SAW) based on interdigital transducers (IDT) for live-cell investigations, such as cell manipulation, cell separation, cell seeding, cell migration, cell characteristics, and cell behaviours. The approach is also known as acoustofluidic, because the SAW device is coupled with a microfluidic system that contains live cells. This article provides an overview of several forms of IDT of SAW devices on recently used cells. Conclusively, a brief viewpoint and overview of the future application of SAW techniques in live-cell investigations were presented.

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Section: Discussionmentioning

confidence: 99%

“…The FIDT was used by Collins et al to create a range of 25 µm for sorting 2 µm-diameter particles at frequencies of 386 MHz. Their study showed that the FIDT system improved streaming efficiency compared with conventional SAWs with acoustic energy focusing and acoustic streaming [99].…”

Section: Focused Idtmentioning

confidence: 99%

Current Development in Interdigital Transducer (IDT) Surface Acoustic Wave Devices for Live Cell In Vitro Studies: A Review

et al. 2021

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“…One of the generic configurations for SAW-based microfluidics is explained for fluid mixing (actuation). Figure 24 shows the schematic of the application of Focused Surface Acoustic Waves (FSAWs) in the field of microfluidics for enhancing the liquid mixing (actuation) and diffusion rate [ 191 ]. In this configuration, the microfluidic system is placed between the two focused interdigitated electrodes.…”

Section: Saw Applicationsmentioning

confidence: 99%

Surface Acoustic Wave (SAW) Sensors: Physics, Materials, and Applications

Mandal

Banerjee

2022

Sensors

210

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Surface acoustic waves (SAWs) are the guided waves that propagate along the top surface of a material with wave vectors orthogonal to the normal direction to the surface. Based on these waves, SAW sensors are conceptualized by employing piezoelectric crystals where the guided elastodynamic waves are generated through an electromechanical coupling. Electromechanical coupling in both active and passive modes is achieved by integrating interdigitated electrode transducers (IDT) with the piezoelectric crystals. Innovative meta-designs of the periodic IDTs define the functionality and application of SAW sensors. This review article presents the physics of guided surface acoustic waves and the piezoelectric materials used for designing SAW sensors. Then, how the piezoelectric materials and cuts could alter the functionality of the sensors is explained. The article summarizes a few key configurations of the electrodes and respective guidelines for generating different guided wave patterns such that new applications can be foreseen. Finally, the article explores the applications of SAW sensors and their progress in the fields of biomedical, microfluidics, chemical, and mechano-biological applications along with their crucial roles and potential plans for improvements in the long-term future in the field of science and technology.

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“…Surface acoustic waves (SAWs) are electromechanical waves with nanometers or sub-nanometer amplitudes propagating along the surface of a piezoelectric substrate, accompanied by changes in the electric field along its propagation path. The wave energy is concentrated within one wavelength depth of the device surface, and the wave energy is dissipated into the liquid, which forms an efficient method for driving liquids at the microscale level [30] , [31] . The large shear force generated in the liquid can effectively exfoliate the bulk materials into 2D nanosheets [5] , [32] , [33] .…”

Section: Introductionmentioning

confidence: 99%