Supersonically Sprayed Pvdf and Zno Nanoflowers with Built-In Nanocuboids for Wearable Piezoelectric Nanogenerators

Joshi, Bhavana; Seol, Jaewoo; Samuel, Edmund; Lim, Woochul; Park, Chanwoo; Aldalbahi, Ali; El‐Newehy, Mohamed H.; Yoon, Sam S.

doi:10.2139/ssrn.4366436

Cited by 3 publications

(7 citation statements)

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“…In addition, rigid TiO 2 with nanostructures and ultralow viscoelasticity was grown on the surface of the P(VDF-TrFE) fibers, greatly reducing the viscoelasticity of the active layer, thereby guaranteeing ultrafast response/relaxation. Many semiconductor materials are widely used in piezoelectric tactile sensors, such as ZnO, [109][110][111] BaTiO 3 , [112][113][114] and Pb(Zr,Ti)O 3 , 115,116 and are known as piezoelectric semiconductor materials because of their piezoelectric effects. Piezoelectric semiconductors generally suffer from rigidity and brittleness, and cannot meet the design requirements of flexible tactile sensors.…”

Section: Semiconductor Materialsmentioning

confidence: 99%

“…Many semiconductor materials are widely used in piezoelectric tactile sensors, such as ZnO, 109–111 BaTiO 3 , 112–114 and Pb(Zr,Ti)O 3 , 115,116 and are known as piezoelectric semiconductor materials because of their piezoelectric effects. Piezoelectric semiconductors generally suffer from rigidity and brittleness, and cannot meet the design requirements of flexible tactile sensors.…”

Section: Structural Materialsmentioning

confidence: 99%

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Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Niu,

Li,

Kim

et al. 2023

InfoMat

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Intelligent applications, with tactile sensors at their core, represent significant advancement in the field of artificial intelligence. However, achieving perception abilities in tactile sensors that match or exceed human skin remains a formidable challenge. Consequently, the design and implementation of hierarchical structural materials are considered the optimal solution to this challenge. In contrast to conventional methods, such as complicated lithography and three‐dimensional printing, the cost‐effective and scalable nature of advanced solution‐synthesis methods makes them ideal for preparing diverse tactile sensors with hierarchical structural materials. However, the process and applicability of advanced solution synthesis methods have yet to form a seamless system. Accordingly, the development and intellectualization of tactile sensors based on advanced solution synthesis methods are still in their early stages, and require a comprehensive and systematic review to usher in progress. This study delves into the advantages and disadvantages of various advanced solution synthesis methods, providing detailed insights. Furthermore, the positive effects of hierarchical structural materials constructed using these methods in tactile sensors and their intelligent applications are also discussed in depth. Finally, the challenges and future opportunities faced by this emerging field are summarized.image

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Section: Semiconductor Materialsmentioning

confidence: 99%

Section: Structural Materialsmentioning

confidence: 99%

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Niu,

Li,

Kim

et al. 2023

InfoMat

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“…Supersonic spray deposition is scalable, nonvacuum, and fast and, thus, considered a commercially viable method for industrial production [34][35][36][37][38]. In addition, the α phase of PVDF can be transformed into the polar β phase based on the shear stress inflicted by supersonic impact between ZnO and PVDF, thereby increasing the piezoelectricity and output power of the films [39]. This study determines the optimal combination of ZnO and PVDF that produces excellent piezoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Supersonically Sprayed Flexible ZnO/PVDF Composite Films with Enhanced Piezoelectricity for Energy Harvesting and Storage

Ojha

Joshi

Samuel

et al. 2023

International Journal of Energy Research

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A flexible piezoelectric nanogenerator (PENG) was developed to convert ambient mechanical energy into electrical energy. Highly crystalline template-free zinc oxide (ZnO) microrods were prepared using a wet chemical method at a low temperature. As-synthesized ZnO microrods were blended with polyvinylidene fluoride (PVDF) to prepare a piezoelectric composite film using the supersonic spraying method. A PENG electrode comprising ZnO microrods (0.5 g) produced 15.2 V under a tapping force of 20 N at 5 Hz. In addition, an output current of 32 μA was produced with a maximum power density of 12.5 μW cm–2. The output voltage considering various body movements was investigated to demonstrate the flexibility and durability of the proposed PENG. Furthermore, the supercapacitive properties of ZnO/reduced graphene oxide were studied.

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“…PENGs harvest electrical energy using ambient mechanical energy to produce power in the range of microwatts to milliwatts [5][6][7], and this power is sufficient for use in microelectronic devices [8]. Moreover, small PENGs can power light-emitting diodes (LEDs) under tapping and bending conditions, indicating their usefulness in display applications [9]. PENG-based detection of human body movements is also gaining attention owing to emergence of wired or wireless human-machine interfaces and soft bioelectronics [10,11].…”

Section: Introductionmentioning

confidence: 99%

“…Enhancement of the electroactive phase of PVDF has been reported using various techniques, for example, electrospinning owing to a high electric field [24,25], spin coating owing to the high-speed rotation of a viscous PVDF-based sol-gel [26], and cold spraying owing to shear stress and stretching due to the deposition of precursor droplets with supersonic velocity [9]. However, in each of these techniques, due to the absence of ceramics, the PVDF-based PENG experiences significant constraints, i.e., low piezopotential output caused by the insufficient transformation of the βphase in PVDF [26].…”

Section: Introductionmentioning

confidence: 99%

Supersonically Sprayed Cobalt Titanate and PVDF for Flexible Piezoelectric Nanogenerators

Park,

Joshi,

Samuel

et al. 2023

International Journal of Energy Research

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Piezoelectric nanogenerators (PENGs) are the core components of self-powered devices used in sensors, ecofriendly wearable gadgets, and biomedical implants. This study introduces and demonstrates a flexible PENG with supersonically cold-sprayed films of cobalt titanate (CTO) and polyvinylidene fluoride (PVDF). An electrically poled PENG produces a maximum output voltage of 34.8 V under a tapping force of 20 N, whereas a CTO/PVDF-based PENG exhibits 25.4 V across a loading resistance ( R L ) of 50 MΩ and generates a short-circuit current of 30 μA at 0.1 MΩ. Furthermore, the maximum power density is 25 μW·cm-2 at R L = 0.6 MΩ. Cyclic tapping and bending test results show that open-circuit voltages (Voc) of 25.4 and 5.8 V are produced under the tapping cycle of N tap = 4200 and bending cycle of N bend = 750 , respectively, confirming the mechanical durability of the PENG. Thus, the potential of CTO/PVDF films for use in PENGs with various functionalities can be confirmed based on the V oc values generated from bending, mobile tapping, walking, and lifting movements.

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Supersonically Sprayed Pvdf and Zno Nanoflowers with Built-In Nanocuboids for Wearable Piezoelectric Nanogenerators

Cited by 3 publications

References 0 publications

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Advances in advanced solution‐synthesis‐based structural materials for tactile sensors and their intelligent applications

Supersonically Sprayed Flexible ZnO/PVDF Composite Films with Enhanced Piezoelectricity for Energy Harvesting and Storage

Supersonically Sprayed Cobalt Titanate and PVDF for Flexible Piezoelectric Nanogenerators

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