Engineering inclined orientations of piezoelectric films for integrated acoustofluidics and lab-on-a-chip operated in liquid environments

Fu, Yong Qing; Pang, Hua-Feng; Torun, Hamdi; Tao, Ran; McHale, Glen; Reboud, Julien; Tao, Kai; Zhou, Jian; Luo, Jingting; Gibson, D. R.; Luo, Jikui; Hu, PingAn

doi:10.1039/d0lc00887g

Cited by 23 publications

(7 citation statements)

References 155 publications

(135 reference statements)

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“…In the field of ice mitigation, thin-film-based SAWs have already been demonstrated to effectively generate both acoustic wave vibration and thermal effects on the device surface, thus offering great potentials for both anti-icing and de-icing with a high efficiency. , However, interfacial behaviors, ice removal, and prevention mechanisms for both anti-icing and de-icing of the rime ice under propagating SAWs have never been explored. Compared with conventional acoustofluidic research of sensors or laboratory-on-a-chip using the thin-film SAW devices, ,,, ice protection and mitigation using thin-film SAWs are more complex, mainly because there is varied phase evolution (from solid, liquid, to vapor, or their mixtures) and dynamic evolution of interfacial microstructures during the processes under the agitation of propagating waves. There is a lack of in-depth investigations on the interfacial responses and phase evolution driven by SAWs during the icing and de-icing processes, which restricts the further exploration of SAW devices for ice mitigation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mitigation Mechanisms of Rime Icing with Propagating Surface Acoustic Waves

et al. 2022

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Ice accretion on economically valuable and strategically important surfaces poses significant challenges. Current anti-/de-icing techniques often have critical issues regarding their efficiency, convenience, long-term stability, or sustainability. As an emerging ice mitigation strategy, the thin-film surface acoustic wave (SAW) has great potentials due to its high energy efficiency and effective integration on structural surfaces. However, anti-/de-icing processes activated by SAWs involve complex interfacial evolution and phase changes, and it is crucial to understand the nature of dynamic solid–liquid–vapor phase changes and ice nucleation, growth, and melting events under SAW agitation. In this study, we systematically investigated the accretion and removal of porous rime ice from structural surfaces activated by SAWs. We found that icing and de-icing processes are strongly linked with the dynamical interfacial phase and structure changes of rime ice under SAW activation and the acousto-thermally induced localized heating that facilitate the melting of ice crystals. Subsequently, interactions of SAWs with the formed thin water layer at the ice/structure interface result in significant streaming effects that lead to further damage and melting of ice, liquid pumping, jetting, or nebulization.

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Section: Introductionmentioning

confidence: 99%

Dynamic Mitigation Mechanisms of Rime Icing with Propagating Surface Acoustic Waves

et al. 2022

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“…Therefore, the shear mode can work in both dry and liquid environments [ 115 ]; however, the longitudinal is only able to work outside liquid conditions. As a result, the shear mode can be utilized in the biosensor application and gas sensors, but the longitudinal mode is only suitable for gas sensors [ 112 , 276 , 277 ].…”

Section: Piezoelectric Mems Actuating and Sensing For Gas Detectionmentioning

confidence: 99%

A review of piezoelectric MEMS sensors and actuators for gas detection application

et al. 2023

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Piezoelectric microelectromechanical system (piezo-MEMS)-based mass sensors including the piezoelectric microcantilevers, surface acoustic waves (SAW), quartz crystal microbalance (QCM), piezoelectric micromachined ultrasonic transducer (PMUT), and film bulk acoustic wave resonators (FBAR) are highlighted as suitable candidates for highly sensitive gas detection application. This paper presents the piezo-MEMS gas sensors’ characteristics such as their miniaturized structure, the capability of integration with readout circuit, and fabrication feasibility using multiuser technologies. The development of the piezoelectric MEMS gas sensors is investigated for the application of low-level concentration gas molecules detection. In this work, the various types of gas sensors based on piezoelectricity are investigated extensively including their operating principle, besides their material parameters as well as the critical design parameters, the device structures, and their sensing materials including the polymers, carbon, metal–organic framework, and graphene.

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“…[28,29] ZnO is a typical piezoelectric material that, in the form of relatively thick films (generally over 5 µm), is widely used to generate SAWs with IDTs for a large variety of applications. [24,30,31] Finally, some comparative experiments have also been carried out with black LiNbO 3 , a partially reduced variety of piezoelectric material showing piezoelectric but not pyroelectric activity. [32] Discarding pyroelectric effects during de-icing and therefore sustaining the use of fully transparent LiNbO 3 plates (in the future other transparent piezoelectric materials or layers as well) and low thermal conductive materials for AW activation should widen the application of this technology beyond de-icing on aluminium foils as recently proposed.…”

Section: Introductionmentioning

confidence: 99%

A Holistic Solution to Icing by Acoustic Waves: De‐Icing, Active Anti‐Icing, Sensing with Piezoelectric Crystals, and Synergy with Thin Film Passive Anti‐Icing Solutions

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et al. 2023

Adv Funct Materials

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Icing has become a hot topic both in academia and in the industry given its implications in transport, wind turbines, photovoltaics, and telecommunications. Recently proposed de-icing solutions involving the propagation of acoustic waves (AWs) at suitable substrates may open the path for a sustainable alternative to standard de-icing or anti-icing procedures. Herein, the fundamental interactions are unraveled that contribute to the de-icing and/or hinder the icing on AW-activated substrates. The response toward icing of a reliable model system consisting of a piezoelectric plate activated by extended electrodes is characterized at a laboratory scale and in an icing wind tunnel under realistic conditions. Experiments show that surface modification with anti-icing functionalities provides a synergistic response when activated with AWs. A thoughtful analysis of the resonance frequency dependence on experimental variables such as temperature, ice formation, or wind velocity demonstrates the application of AW devices for real-time monitoring of icing processes.

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Engineering inclined orientations of piezoelectric films for integrated acoustofluidics and lab-on-a-chip operated in liquid environments

Abstract: Different acoustic wave modes are required for effective implementation of biosensing and liquid actuation functions in an acoustic wave-based lab-on-a-chip. For efficient sensing in liquids, shear waves (either a thickness...

Cited by 23 publications

References 155 publications

Dynamic Mitigation Mechanisms of Rime Icing with Propagating Surface Acoustic Waves

Dynamic Mitigation Mechanisms of Rime Icing with Propagating Surface Acoustic Waves

A review of piezoelectric MEMS sensors and actuators for gas detection application

A Holistic Solution to Icing by Acoustic Waves: De‐Icing, Active Anti‐Icing, Sensing with Piezoelectric Crystals, and Synergy with Thin Film Passive Anti‐Icing Solutions

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