Flexible piezoresistive three-dimensional force sensor based on interlocked structures

Chen, Songyue; Bai, Chao; Zhang, Chenying; Da, Geng; Liu, Ruiliang; Xie, Yongchun; Zhou, Wei

doi:10.1016/j.sna.2021.112857

Cited by 47 publications

(28 citation statements)

References 40 publications

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“…Due to the significant change in the contact area between conductive components after the tension, highly sensitive responses can be produced even at low external tensile force. Microstructures mainly include porous structure, − fold structure, , bionic structure, − microcracks, surface microarray structure, − and so on. In the research of surface microdome structure design, most of them are used to fabricate flexible pressure sensors , and three-dimensional force detection. , In addition, Chao et al prepared a flexible wearable strain sensor with a sensing layer similar to a laminated tile microstructure, which can detect human motion in the strain range of 0.1538∼80% with high sensitivity (GF is 2369.1), although the preparation process is more complicated.…”

Section: Introductionmentioning

confidence: 99%

“…Huang et al first filled PDMS in the mold with a micropyramid array after curing. After peeling and spraying, an SWCNT conductive layer was deposited on its surface, thus exhibiting broad application prospects in the fields of health monitoring and human-machine interfaces. ,− Cataldi et al . prepared a capacitive touch sensor by spraying a conductive polymer suspension with dispersed carbon nanofibers (CNFs) or graphene nanosheets (GNPs) on nitrile rubber gloves, which can detect 0.03∼5 N of pressure.…”

Section: Introductionmentioning

confidence: 99%

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High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

Wang

Zheng

et al. 2022

ACS Appl. Electron. Mater.

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In this research, polydimethylsiloxane (PDMS) and graphene nanoplatelets (GNPs) were used as flexible substrates and conductive layers. A facile and template transfer method combined with a low-cost solution-spraying process was adopted to prepare the microdome array GNPs/PDMS flexible strain sensor. The microdome array produces different degrees of in-plane deformation and the gradient distribution of the GNP conductive network on the surface during stretching. This affects the contact effect between the adjacent cells of the GNP conductive network on the film surface in different strain ranges, thereby realizing a sensitive resistance response. The strain sensor of the microdome array GNPs/PDMS exhibits excellent gauge factors (GF) of 8.98 (0.26% < ε < 20%), 18.31 (20% < ε < 43%), and 34.57 (43% < ε < 60%), the highest of which is 8 times higher than that of the planar GNPs/PDMS strain sensor without a microdome array. In addition, the material exhibits remarkable stability and durability (10 000 cycles), fast response time (125 ms), and stable relative frequency/strain sensing performance. Finally, the strain sensors of the microdome array GNPs/PDMS were packaged for various application tests, showing broad application prospects in electronic skin, wearable electronic devices, and component health monitoring.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

Wang

Zheng

et al. 2022

ACS Appl. Electron. Mater.

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“…Friction detection as an electronic skin device has not yet been demonstrated. The currently reported sensors for detecting friction force are obtained by indirectly calculating shear force through existing data. − For example, Surapaneni et al fabricated a flexible tactile sensor by patterning comb-like floating gold electrodes on a compressible PDMS layer. The sensor can measure and differentiate between normal stress and shear force with sensitivities of 0.38 MPa –1 and 79.5 GPa –1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

A Wearable Capacitive Friction Force Sensor for E-Skin

Song

Zhou

Zhao

et al. 2022

ACS Appl. Electron. Mater.

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In recent years, the rapid development of intelligent robots has placed higher demands on robotic hands that can dexterously manipulate objects. Among them, sensors that can measure and differentiate friction in real time have attracted great attention. Here, inspired by the fingerprint morphology, a wearable capacitive friction force sensor is proposed based on the laser etching process. The sensor is composed of polydimethylsiloxane (PDMS) elastomer as the dielectric strain layer and conductive silica gel as the electrode. Both the dielectric strain layers and electrodes are arranged in an interdigital structure and perpendicular to the sensor surface. The capacitance of the sensor decreases with increasing friction force applied to the surface of the sensor. The sensor has excellent sensing performance with a high friction force sensitivity of 0.149 N–1, an ultralow detection limit of 1 N (friction force), and a fast response time of 40 ms, and the sensor does not exhibit fatigue after 1000 friction robustness tests. More importantly, wearable tactile sensors have broad application scenarios in intelligent robotic arms and human motion detection. In addition, the fabrication strategy of this sensor provides a solution for the fabrication of wearable friction force sensors.

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“…6 In particular, pressure and deformation sensors are among the most required ones due to their widespread applicability, 7 being based on different pressure sensing principles including piezoresistive, piezoelectric, triboelectric, or capacitive, among others. 8,9 Piezoresistive sensors allow to transduce an external pressure or deformation into an electrical resistance variation and are typically characterized by high adaptability, simple manufacturing, and low energy consumption. 10 Most recently, piezoresistive sensors hold great promise in the fields of artificial intelligence, robotics, and human−computer interfaces, among others, 11−13 placing new requirements in terms of flexibility, sensing area, or performance with respect to the traditional solutions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Taking into account the implementation of a reliable and responsive network, the ubiquitous installation of sensors connected to the network will be a critical step toward the even faster growth of the IoT concept . In particular, pressure and deformation sensors are among the most required ones due to their widespread applicability, being based on different pressure sensing principles including piezoresistive, piezoelectric, triboelectric, or capacitive, among others. , …”

Section: Introductionmentioning

confidence: 99%

Carrageenan-Based Hybrid Materials with Ionic Liquids for Sustainable and Recyclable Printable Pressure Sensors

Serra

Pereira

Correia

et al. 2022

ACS Sustainable Chem. Eng.

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For reducing the environmental impact of electronic systems (e-waste), increasingly implemented in the scope of the digitalization of society, this work reports on the development of a sustainable pressure sensor based on the combination of natural polymer carrageenan and ionic liquid (IL) 1-butyl-3-methylimidazolium tetrachloroferrate ([Bmim][FeCl 4 ]). Different IL contents were incorporated into the carrageenan matrix (10, 20, and 40 wt %) to evaluate the influence of IL content on the final properties of the hybrid materials. No variations are induced in the chemical structure of carrageenan by the inclusion of the IL. On the other hand, the thermal stability of the polymer decreases with increasing IL content, as well as the Young modulus that decreases from 748 MPa for pristine carrageenan to 437 MPa for the composite with 40 wt % IL content. The ionic conductivity increases up to 8.74 × 10 −9 S/cm for the sample comprising 40 wt % IL. The recyclability of the developed materials has been accessed, and the potential of the blends for the development of printable pressure sensors has been demonstrated.

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Flexible piezoresistive three-dimensional force sensor based on interlocked structures

Cited by 47 publications

References 40 publications

High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

High-Sensitivity GNPs/PDMS Flexible Strain Sensor with a Microdome Array

A Wearable Capacitive Friction Force Sensor for E-Skin

Carrageenan-Based Hybrid Materials with Ionic Liquids for Sustainable and Recyclable Printable Pressure Sensors

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