Rich lamellar crystal baklava-structured PZT/PVDF piezoelectric sensor toward individual table tennis training

Tian, Guo; Deng, Weili; Gao, Yuyu; Xiong, Deping; Li, Huaming; He, Xuebing; Yang, Tao; Jin, Long; Chu, Xiang; Zhang, Haitao; Yan, Wei

doi:10.1016/j.nanoen.2019.03.013

Cited by 220 publications

(124 citation statements)

References 55 publications

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“…So far, the PENG has been widely explored in the area of sensor systems and wearable electronics due to its excellent advantages of light‐weight, simple components, low‐cost, and sustainability . Although PENG has been extensively reported to serve as pressure/force sensing, it is rarely used as a trigger signal for fire safety . With the aid of amplifier circuit and comparator circuit, we employed the output voltage signal from the PENG as a trigger signal to control the operation of the fire extinguisher, forming a smart wireless fire extinguisher system.…”

Section: Resultsmentioning

confidence: 99%

Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System

Zhang

Zhu

et al. 2019

Adv Funct Materials

136

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With the rapid development of the Internet of things (IoT), flexible piezoelectric nanogenerators (PENG) have attracted extensive attention for harvesting environmental mechanical energy to power electronics and nanosystems. Herein, porous piezoelectric fillers with samarium/titanium-doped BiFeO 3 (BFO) are prepared by a freeze-drying method, and then silicone rubber is filled into the microvoids of the piezoelectric ceramics, forming a unique structure based on silicone rubber matrix with uniformly distributed piezoelectric ceramic. When subjected to external force stimulation, compared with conventional piezocomposite films found on undoped BFO without a porous structure, the PENG possesses higher stress transfer ability and thus boosts output performance. The notable enhancement in the stress transfer ability and piezoelectric potential is proven by COMSOL simulations. The PENG can exhibit a maximum open-circuit voltage (V oc ) of 16 V and shortcircuit current (I sc ) of 2.8 µA, which is 5.3 and 5.6 times higher than those of conventional piezocomposite films, respectively. The PENG can be used as a triggering signal to control the operation of fire extinguishers and household appliances. This work not only expands the application scope of lead-free piezoelectric ceramic for energy harvesting, but also provides a novel solution for self-powered mechanosensation and shows great potential application in IoT.

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Section: Resultsmentioning

confidence: 99%

Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System

Zhang

Zhu

et al. 2019

Adv Funct Materials

136

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“…In piezoelectricity, the generation of electric charges by a material is proportional to the applied mechanical stress, conversely, the change in the physical dimensions of the material is related to the applied electric field 2 . This property has been observed in various materials, e.g., ceramic materials such as lead zirconate titanate (PZT) 3 and barium titanate (BaTiO3) 4 , oxides and nitride materials such as zinc oxide (ZnO) 5 and gallium nitride (GaN) 6 , and polymeric materials such as poly(vinylidene fluoride) (PVDF) 7,8 .…”

Section: Introductionmentioning

confidence: 96%

1-3 Castor Oil-Based Polyurethane/PZT Piezoelectric Composite as a Possible Candidate for Structural Health Monitoring

et al. 2020

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In this study, we obtained and characterized a piezoelectric composite with 1-3 connectivity from castor oil polyurethane (PUR) and lead zirconate titanate (PZT) rods. Two samples were obtained, one with 15% PZT volume and the other with 34% PZT volume. The ac electrical properties of the 1-3 piezoelectric composite samples demonstrated the frequency-dependence behavior of disordered solids. The piezoelectric coefficient (d 33) was greatly influenced by the number of PZT rods and the matrix curing process. The sample with 34% PZT volume showed a higher d 33 value, (246 pC/N measured after 30 d of polarization). The composites were evaluated for use in acoustic emission wave sensors for application in structural health monitoring.

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“…Lead zirconate titanate (PZT) and polyvinylidene fluoride (PVDF) are the most commonly used piezoelectric mediums for piezoelectric sensors due to their high piezoelectric coefficients ( d 33 ). [ 18–21 ] However, the toxic lead component in PZT and the high impedance of PVDF have limited their applications in wearable piezoelectric devices. [ 22,23 ] In this regard, semiconductor‐based piezoelectric strain sensors represented by zinc oxide (ZnO) and GaN have been extensively studied as a result of their mechanical and chemical stability as well as environmental and biological compatibility.…”

Section: Introductionmentioning

confidence: 99%

Wearable and Ultrasensitive Strain Sensor Based on High‐Quality GaN pn Junction Microwire Arrays

Cheng

Han

Cao

et al. 2020

Small

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With the rapid growth in wearable electronics sensing devices, flexible sensing devices that monitor the human body have shown great promise in personalized healthcare. In the study, high-quality GaN pn junction microwire arrays with different aspect ratios and large-area uniformity are fabricated through an easy, repeatable fabrication process. The piezoelectric coefficient (d 33 ) of GaN pn junction microwire arrays increases from 7.23 to 14.46 pm V −1 with the increasing of the aspect ratio, which is several times higher than that of GaN bulk material. Furthermore, flexible ultrasensitive strain sensor based on GaN microwires with the highest d 33 is demonstrated to achieve the maximum open circuit voltage of 10.4 V, and presents excellent durability with stable output signals over 10 000 cycles with a response time of 50 ms. As a flexible and wearable sensor attached to the human skin, the GaN microwire pn junction arrays with such a high degree of uniformity can precisely monitor subtle human pulse and motions, which show great promise in future personalized healthcare.The piezoresistive strain sensors are unquestionably promising candidates for wearable and real-time human motiondetecting devices, [15,16] and they can be sensitive enough for even 10 nm vibration, [17] but the piezoelectric sensors are more prospective for self-powered devices owing to the piezoelectric effect of materials, defined as the occurrence of polarization when the material is subjected to external stress as a result of the separation of the positive and negative gravity centers of the molecules. Lead zirconate titanate (PZT) and polyvinylidene fluoride (PVDF) are the most commonly used piezoelectric mediums for piezoelectric sensors due to their high piezoelectric coefficients (d 33 ). [18][19][20][21] However, the toxic lead component in PZT and the high impedance of PVDF have limited their applications in wearable piezoelectric devices. [22,23] In this regard, semiconductor-based piezoelectric strain sensors represented by zinc oxide (ZnO) and GaN have been extensively studied as a result of their mechanical and chemical stability as well as environmental and biological compatibility. [24][25][26][27][28] In addition to the above advantages of the semiconductor, GaN exhibits merits of easy control of carrier concentration doping and higher stability compared to ZnO, while internal free carriers reduce the output of the device by screening the piezoelectric polarization, which is called free carriers screening. Suppressing the free carriers screening is undoubtedly an effective approach to improve the piezoelectric performance of the devices. [27,29,30] Another method is replacing the bulk or film materials with nanowires (NWs) considering the superior mechanical properties, large aspect ratio, and high energy conversion efficiency of NWs as compared to bulk materials. [31][32][33][34][35] For instance, Kacimi et al. fabricated a flexible strain sensor exhibiting 2 V peak outputs with vertically aligned ultra-long GaN wires, [36] ...

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Rich lamellar crystal baklava-structured PZT/PVDF piezoelectric sensor toward individual table tennis training

Cited by 220 publications

References 55 publications

Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System

Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System

1-3 Castor Oil-Based Polyurethane/PZT Piezoelectric Composite as a Possible Candidate for Structural Health Monitoring

Wearable and Ultrasensitive Strain Sensor Based on High‐Quality GaN pn Junction Microwire Arrays

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