Flexible tactile sensors based on silver nanowires: material synthesis, microstructuring, assembly, performance, and applications

Cuasay, Lei Oscar M.; Salazar, Francesca Louis M.; Balela, Mary Donnabelle L.

doi:10.1007/s42247-022-00371-1

Cited by 10 publications

(7 citation statements)

References 103 publications

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“…With the development of wearable devices, flexible pressure sensors have attracted wide attention in health monitoring and human–computer interaction. − At present, pressure sensors mainly work based on four sensing mechanisms. , This includes piezoelectric effect, capacitive effect, triboelectric effect, and piezoresistive effect. , Through these sensing mechanisms, pressure sensors can convert the pressure exerted on them into corresponding electrical signals. , However, traditional pressure sensors are difficult to adapt to deformation under curved surface or bending conditions because of their relatively rigid materials. , A flexible pressure sensor adopts flexible material and a thin-film sensor structure, which can adapt to various curved surfaces and curved shapes. , For example, Cai et al proposed a flexible sensor based on the carbon nanotube paper film (CNTF) and stress-induced square frustum structure (SSFS) inspired by the surface stress-induced structure of mimosa, which demonstrated excellent sensing performances . Gong et al reported a stretchable strain sensor based on Au/graphene composite film with hierarchical cracks (AGCFs) and demonstrated superior sensing performance .…”

Section: Introductionmentioning

confidence: 99%

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities

Sun,

Cong,

et al. 2024

ACS Appl. Electron. Mater.

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Wearable pressure sensors play an important role in monitoring human health and disease and have been of wide concern by researchers. However, it is still difficult to obtain flexible sensors with ultrahigh monitoring limits, high sensitivity, and wide linear range. In this paper, inspired by pine branches in nature, a nanoneedle-like NiMoO 4 was constructed on a carbonized sponge by the hydrothermal method. It was used as the backbone of pine branches and combined with MWCNTs as branches by electrostatic self-polymerization. Imitating the efficient mutual inductance structure between pine branches, the sensor can enhance the detection with little pressure. The sensor shows extremely high linear detection ranges and good detection limits. It can detect all kinds of tiny stresses in daily life. In addition, by cooperating with the Arduino system, the sensing device can be perfectly combined with daily necessities such as masks and realize human body detection in real-time and upload it to the cloud. Therefore, the sensor has excellent application potential in the fields of medical rehabilitation and the internet of things. In addition, the design of this structure also provides an idea for the study of the piezoresistive properties of three-dimensional porous materials.

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Section: Introductionmentioning

confidence: 99%

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities

Sun,

Cong,

et al. 2024

ACS Appl. Electron. Mater.

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“…Most flexible mechanical sensors are composed of elastic substrates and conducting sensing nanomaterials [9][10][11][12][13]. For example, Lee et al prepared porous nanofibrous thin layers of carbon nanotubes, graphene and fluorinated copolymer by electrospinning [14].…”

Section: Introductionmentioning

confidence: 99%

A 3D Composited Flexible Sensor Based on Percolative Nanoparticle Arrays to Discriminate Coupled Pressure and Strain

et al. 2023

Sensors

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Flexible mechanical sensors based on nanomaterials operate on a deformation-response mechanism, making it challenging to discern different types of mechanical stimuli such as pressure and strain. Therefore, these sensors are susceptible to significant mechanical interference. Here, we introduce a multifunctional flexible sensor capable of discriminating coupled pressure and strain without cross-interference. Our design involves an elastic cantilever fixed on the pillar of the flexible main substrate, creating a three-dimensional (3D) substrate, and two percolative nanoparticle (NP) arrays are deposited on the cantilever and main substrate, respectively, as the sensing materials. The 3D flexible substrate could confine pressure/strain loading exclusively on the cantilever or main substrate, resulting in independent responses of the two nanoparticle arrays with no cross-interference. Benefitting from the quantum transport in nanoparticle arrays, our sensors demonstrate an exceptional sensitivity, enabling discrimination of subtle strains down to 1.34 × 10−4. Furthermore, the suspended cantilever with one movable end can enhance the pressure perception of the NP array, exhibiting a high sensitivity of −0.223 kPa−1 and an ultrahigh resolution of 4.24 Pa. This flexible sensor with multifunctional design will provide inspiration for the development of flexible mechanical sensors and the advancement of decoupling strategies.

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“…To meet this function, a variety of materials have come to our vision, including conductive materials (e.g. carbon nanotubes [9,10], graphene [11,12], metal nanowires [13,14], and conductive polymers [15,16]) and flexible substrates (e.g. polydimethylsiloxane (PDMS) [17,18], polyvinylidene difluoride (PVDF) [19,20], rubber [21,22], or hydrogel [23,24]).…”

Section: Introductionmentioning

confidence: 99%

Multifunctional starch-based double-network hydrogels as electronic skin

Zheng,

Qin,

Xia

et al. 2023

J. Phys. D: Appl. Phys.

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The realization of flexible pressure sensors that could mimic the perception functions of human skin (touch, temperature, and humidity) is important for development of electronic skin. However, the design and preparation of highly sensitive sensors for multifunctional sensing of pressure, temperature and humidity remains a challenge. Here, we first designed and prepared a flexible starch/polyacrylamide double-network (DN) hydrogel, with additional introduction of Na+ and Cl- to further enhance the electrical properties. Subsequently, a multifunctional pressure sensor was fabricated by sandwiching a microstructured starch-based hydrogel into two flexible AgNWs electrodes. In the test run, the prepared sensor exhibited a high sensitivity of 48.35 kPa-1, a fast response time of 11 ms, and remarkable mechanical stability (>3000 cycles). Given the satisfactory performance for pressure sensing, we demonstrated the ability of the sensor to monitor various human dynamics. Moreover, the starch-based hydrogel was further developed as a flexible temperature and humidity sensor for its water absorption and swelling properties. In particular, the asynchrony of pressure, temperature and humidity strains (straining to stability at 11 ms, 2 s and 10 s, respectively) resulted in the automatic separation of different electrical signals. The intuitive interpretation of the data without involving complex parameter separation calculations allowed the starch-based hydrogels to be developed as an integrated, multifunctional sensor of pressure, temperature and humidity with high sensitivity and flexibility. The above properties suggest that the prepared bio-based hydrogels may provide a new solution for the prospect of green and multifunctional electronic skin development.

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Flexible tactile sensors based on silver nanowires: material synthesis, microstructuring, assembly, performance, and applications

Cited by 10 publications

References 103 publications

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities

A 3D Composited Flexible Sensor Based on Percolative Nanoparticle Arrays to Discriminate Coupled Pressure and Strain

Multifunctional starch-based double-network hydrogels as electronic skin

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Flexible tactile sensors based on silver nanowires: material synthesis, microstructuring, assembly, performance, and applications

Cited by 10 publications

References 103 publications

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO4@CMF for Real-Time Monitoring of Human Activities

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO4@CMF for Real-Time Monitoring of Human Activities

A 3D Composited Flexible Sensor Based on Percolative Nanoparticle Arrays to Discriminate Coupled Pressure and Strain

Multifunctional starch-based double-network hydrogels as electronic skin

Contact Info

Product

Resources

About

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities

Wearable, High-Sensitivity Piezoresistive Pressure Sensor Based on MWCNTs/NiMoO₄@CMF for Real-Time Monitoring of Human Activities