Accurate recognition of object contour based on flexible piezoelectric and piezoresistive dual mode strain sensors

Gao, Zhiqiang; Ren, Bing; Fang, Zhaozhou; Kang, Huiqiang; Han, Jing; Li, Jie

doi:10.1016/j.sna.2021.113121

Cited by 34 publications

(21 citation statements)

References 33 publications

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“…The dialysate was made when cellulose powder was added last and mixed well. The solution was then poured into a mold and concentrated in a vacuum drying oven at 70 °C to make a conductive hydrogel [ 41 ]. In another work using a similar method, multi-walled carbon nanotubes (MWCNT) and chitosan were added to 15 mL of acetic acid, then mixed with lauryl methacrylate to obtain the hydrogel by adding N,N,N′,N′-tetramethylethylenediamine [ 42 ].…”

Section: Fabrication and Synthesis Of Hydrogel-based Piezoelectric Co...mentioning

confidence: 99%

“…Gao et al proposed an energy-harvesting device with piezoresistive and piezoelectric properties using PVDF-TrFE/ZnO and PEDOT: PSS hydrogel to identify the profile of the grasped object. This device achieves an average identification rate of 84% for eight different shapes and sizes of objects and can produce an output voltage of 1.45 V at a load of 2 N. The combination of piezoelectric and piezoresistive sensors not only enables the robot to detect dynamic and static forces simultaneously, but also significantly increases the precision of recognizing object contours, which provides a new idea for unmanned sorting of intelligent robots [ 41 ].…”

Section: Hydrogel-based Piezoelectric Energy Harvestersmentioning

confidence: 99%

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Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Lin

et al. 2023

Micromachines

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Flexible electronics have great potential in the application of wearable and implantable devices. Through suitable chemical alteration, hydrogels, which are three-dimensional polymeric networks, demonstrate amazing stretchability and flexibility. Hydrogel-based electronics have been widely used in wearable sensing devices because of their biomimetic structure, biocompatibility, and stimuli-responsive electrical properties. Recently, hydrogel-based piezoelectric devices have attracted intensive attention because of the combination of their unique piezoelectric performance and conductive hydrogel configuration. This mini review is to give a summary of this exciting topic with a new insight into the design and strategy of hydrogel-based piezoelectric devices. We first briefly review the representative synthesis methods and strategies of hydrogels. Subsequently, this review provides several promising biomedical applications, such as bio-signal sensing, energy harvesting, wound healing, and ultrasonic stimulation. In the end, we also provide a personal perspective on the future strategies and address the remaining challenges on hydrogel-based piezoelectric electronics.

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Section: Fabrication and Synthesis Of Hydrogel-based Piezoelectric Co...mentioning

confidence: 99%

Section: Hydrogel-based Piezoelectric Energy Harvestersmentioning

confidence: 99%

Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Lin

et al. 2023

Micromachines

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“…Dual mode hydrogel strain sensors. Recent progress in the design of hydrogel-based strain sensors has enabled the development of dual-mode strain-sensing mechanisms for multiple applications, such as combining piezoresistive and piezoelectric properties, 83,106 piezoresistive and triboelectric properties, 82,100 or piezoresistive and capacitive properties. 69,100,107 For example, a dual-mode mechanism comprising piezoresistive and piezoelectric properties can be achieved by incorporating the piezoelectric material PVDF-TrFE into a conductive hydrogel network.…”

Section: (C))mentioning

confidence: 99%

“…69,100,107 For example, a dual-mode mechanism comprising piezoresistive and piezoelectric properties can be achieved by incorporating the piezoelectric material PVDF-TrFE into a conductive hydrogel network. 83,106 Similarly, other combinations of sensing mechanisms can be realized by altering the device assembly while preparing the application-mechanism-oriented hydrogel composition.…”

Section: (C))mentioning

confidence: 99%

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Zaidi¹,

Saeed²,

Heo³

et al. 2023

J. Mater. Chem. A

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“…Flexible electronic devices have been an important branch of the modern electric industry due to their great potential usage in applications like human health and motion detection, − human–machine interfaces, − intelligent robots, − and so on. , Among flexible electronics, wearable flexible strain sensors have attracted increasing attention due to their simple frameworks and simplicity to be fabricated. However, there are many challenges that restrict the widespread application of flexible strain sensors.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive, Highly Stable, and Flexible Strain Sensor Inspired by Nature

Wang

Liu

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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For advanced flexible strain sensors, it is not difficult to achieve high sensitivity only. However, integrating high sensitivity, high stability, and high durability into one sensor still remains a great challenge. Fortunately, natural creatures with diversified excellent performances have given us a lot of ready-made solutions. Here, scorpion and spiderweb are selected as coupling bionic prototypes, which are famous for their ultrasensitive sensing capacity and excellent structural durability, respectively. Based on that, a bioinspired strain sensor is successfully fabricated. The results demonstrate that the bioinspired strain sensor has a sensitivity of 940.5 in the strain range of 0–1.5% and a sensitivity of 2742.3 between 1.5 and 2.5%. Meantime, this sensor with a spiderweb-like reticular structure has a great improvement in stability and durability. Specifically, the sensor exhibits excellent stability during bending and stretching cycles over 80,000 times. Moreover, the response time and recovery time of the sensor are 169 and 195 ms, respectively. Besides, the sensor also has functions such as vibrating frequency identification due to its low hysteresis. Based on the excellent performance, the sensor can be applied to monitor human body motions serving as wearable electronics.

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Accurate recognition of object contour based on flexible piezoelectric and piezoresistive dual mode strain sensors

Cited by 34 publications

References 33 publications

Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Recent Progress on Hydrogel-Based Piezoelectric Devices for Biomedical Applications

Multifunctional small biomolecules as key building blocks in the development of hydrogel-based strain sensors

Ultrasensitive, Highly Stable, and Flexible Strain Sensor Inspired by Nature

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