Wearable piezoresistive pressure sensors based on 3D graphene

Cao, Minghui; Su, Jie; Fan, Shuangqing; Qiu, Hengwei; Su, Dongliang; Li, Le

doi:10.1016/j.cej.2020.126777

Cited by 252 publications

(136 citation statements)

References 160 publications

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“…Among these different sensing approaches, piezoresistive sensors have gained popularity due to facile read-out mechanism, simple preparation, low power consumption, and convenient signal acquisition. [22,23] Two important variables to evaluate flow sensor performance include detection threshold and sensitivity. Researchers aim to reach a trade-off between these two variables.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Moshizi

Moradi

et al. 2021

Adv Materials Technologies

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unmanned underwater robots, [3] sleep apnea treatment, [4] and other biomedical applications. [5] Among these, mimicking sensory hair cells that are ubiquitous in the creatures such as fish lateral line, crocodile body, locust's legs, mammalian vestibular system, and hearing system has attracted significant interest among many researchers. In nature, sensory hair cells work based on mechanical deflection induced by flow, vibration, acoustic vibration, and gravitational force, generating electrochemical signals and transmitting them to the brain. [6,7] The organs of balance (saccule, utricle, and semicircular canals) are filled with a fluid called the endolymph, which has a high concentration of potassium (K + ) ions and is low in sodium (Na + ) ions. When a linear or angular acceleration occurs, the ciliary tip links stretch or relax, depending on movement direction. In the case of the links stretching, the tip-links' channels are opened, allowing entry of particular cations (including potassium) into the cell, causing depolarization in the cell.

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Section: Introductionmentioning

confidence: 99%

Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Moshizi

Moradi

et al. 2021

Adv Materials Technologies

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“…Mousaabadi et al, proposed reduced graphene oxide and carbon nanotube composite functionalized by azobenzene that could detect curcumin in the range of 0.008 to 10.0 μM with the detection limit of 0.003 μM [ 26 ]. Three-dimensional (3D) graphene-based wearable piezoresistive sensors were considered promising flexible sensors due to their facile preparation, simple read-out mechanism, and low power consumption [ 27 ]. Zhao et al, first synthesized an MoS 2 -CNTs@GONR nanocomposite that exhibited satisfactory stability and accuracy for quercetin detection in actual samples [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Pillared Graphene Structures Supported by Vertically Aligned Carbon Nanotubes as the Potential Recognition Element for DNA Biosensors

Shunaev

Glukhova

2020

Materials

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The development of electrochemical biosensors is an important challenge in modern biomedicine since they allow detecting femto- and pico-molar concentrations of molecules. During this study, pillared graphene structures supported by vertically aligned carbon nanotubes (VACNT-graphene) are examined as the potential recognition element of DNA biosensors. Using mathematical modeling methods, the atomic supercells of different (VACNT-graphene) configurations and the energy profiles of its growth are found. Regarding the VACNT(12,6)-graphene doped with DNA nitrogenous bases, calculated band structure and conductivity parameters are used. The obtained results show the presence of adenine, cytosine, thymine, and guanine on the surface of VACNT(12,6)-graphene significantly changes its conductivity so the considered object could be the prospective element for DNA biosensing.

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“…Several studies have reported the use of carbon nanofillers with high aspect ratios (i.e., width-to-thickness ratios) to form conductive pathways in the insulating polymer matrix. These studies have demonstrated that polymer/CNTs or polymer/graphene composites have good piezoresistive performances [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. However, carbon fillers generally tend to agglomerate owing to their affinity resulting from strong Van der Waals forces; this issue adversely affects the uniform dispersion of the carbon filler in the flexible matrix.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, one recent study shows that polyvinylidene fluoride (PVDF) films containing graphene nanoplatelets (GNPs) are suitable for flexible strain sensor fabrication using the solution mixing method [ 11 ]. Recently, graphene-based piezoresistive materials with a 3D structure have been synthesized by various methods such as 3D printing, self-assembly, and electrospinning [ 12 ]. Although 3D structure has been known to greatly enhance sensor performance, the low-cost, large-scale synthesis of 3D-structured piezoresistive materials is still challenging.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing

Song

Son

Park

et al. 2021

Sensors

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In this study, 3D-printable flexible piezoresistive composites containing various amounts of cilia-like hybrid fillers were developed. In the hybrid fillers, micro-scale Cu particles with a 0D structure may allow them to easily disperse into the flexible TPU matrix. Furthermore, nanoscale multi-walled carbon nanotubes (MWCNTs) with a high aspect ratio, present on the surface of the Cu particles, form an electrical network when the polymer matrix is strained, thus providing good piezoresistive performance as well as good flowability of the composite materials. With an optimal hybrid filler content (17.5 vol.%), the 3D-printed piezoresistive composite exhibits a gauge factor of 6.04, strain range of over 20%, and durability of over 100 cycles. These results highlight the potential applications of piezoresistive pressure sensors for health monitoring, touch sensors, and electronic skin.

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Wearable piezoresistive pressure sensors based on 3D graphene

Cited by 252 publications

References 160 publications

Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Biomimetic Ultraflexible Piezoresistive Flow Sensor Based on Graphene Nanosheets and PVA Hydrogel

Pillared Graphene Structures Supported by Vertically Aligned Carbon Nanotubes as the Potential Recognition Element for DNA Biosensors

Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing

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