Flexible and highly sensitive three-axis pressure sensors based on carbon nanotube/polydimethylsiloxane composite pyramid arrays

Jung, Young Jin; Jung, Kyung Kuk; Kim, Dong Hwan; Kwak, Dong Hwa; Ahn, Seokyoung; Han, Jeong Sam; Ko, Jong Soo

doi:10.1016/j.sna.2021.113034

Cited by 35 publications

(16 citation statements)

References 25 publications

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“…With the rapid development of emerging industries such as touchable displays, 1 electronic skins, 2 intelligent robotics, 3 and wearable devices, 4 sensors as the most important components have been paid enormous attention. According to the difference of function, pressure sensors can be divided into piezoresistive pressure sensor, 5,6 capacitive pressure sensor, 7 and piezoelectric pressure sensor 8 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of conductive and superhydrophobic poly(lactic acid) nonwoven fabric for human motion detection

Zeng

Lai

et al. 2022

J of Applied Polymer Sci

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In recent years, piezoresistive pressure sensors with superhydrophobicity have aroused considerable attention. In addition, to comply with “sustainable development” strategy, the sensors fabricated with eco‐friendly materials is of great theoretical and practical significance. Herein, tannic acid (TA) was first absorbed on the surface of poly(lactic acid) (PLA) nonwoven fabric by simple dipping method. After that, silver (Ag) particles were in situ generated on the surface to construct roughness with the reduction role of TA by immersing the fabric into silver nitrate aqueous solution. Finally, n‐lauryl mercaptan was grafted on the Ag particles via Ag–S bonds to provide low surface energy, and a conductive and superhydrophobic PLA (CSPLA) nonwoven fabric was fabricated. The obtained CSPLA nonwoven fabric had a high water contact angle of 150.3°. The fabric‐based piezoresistive pressure sensor possessed high sensitivity, fast response, good stability, and excellent reusability, and was successfully applied for detecting various human motions including voice recognition, joint bending, stomping, walking, and jumping. The fabricated sensor has great application potential in the fields of touchable displays, electronic skins, intelligent robotics, and wearable devices.

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Section: Introductionmentioning

confidence: 99%

Fabrication of conductive and superhydrophobic poly(lactic acid) nonwoven fabric for human motion detection

Zeng

Lai

et al. 2022

J of Applied Polymer Sci

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“…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 . Most recently, piezoresistive sensors hold great promise in the fields of artificial intelligence, robotics, and human–computer interfaces, among others, − placing new requirements in terms of flexibility, sensing area, or performance with respect to the traditional solutions. Traditionally, piezoresistive sensors are based on strain gages and metallic semiconductors; the ones based on semiconductors materials show high gauge factors (GFs)a parameter that quantifies the resistance variation with deformationbut are mechanically fragile and difficult to implement in large areas or curved surfaces .…”

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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“…Recently, significant efforts have been devoted to enhancing the sensitivity, linear detection range, etc., through materials optimization and structural design. Notably, it has been illustrated that various microstructural designs, including pillar [22][23][24] , convex [7,[25][26][27] , pyramid [28][29][30] , wave [31,32] and three-dimensional network structures [33][34][35] , are effective strategies to acquire highly sensitive flexible piezoresistive sensors. For example, Cao et al reported a flexible tactile sensor based on single-walled carbon nanotubes/Polydimethylsiloxane (CNTs/PDMS) with micropyramid arrays by templating from a Si mold [28] .…”

Section: Introductionmentioning

confidence: 99%

A template-stripped carbon nanofiber/poly(styrene-butadiene-styrene) compound for high-sensitivity pressure and strain sensing

Xiong¹,

Liu²,

Zhao³

et al. 2022

Soft Sci

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Materials selection and microstructural design of the sensing part of flexible pressure sensors are of great significance in improving their performance. However, achieving synergy between the sensing material and the microstructure of the flexible sensors remains a challenge. Herein, compressible and stretchable sensors based on a carbon nanofiber/poly(styrene-butadiene-styrene) (CNF/SBS) compound are demonstrated with a template-stripped method for detecting various human motions, including pulses, finger bending and pressure distributions. Benefiting from the adjustable fingerprint microstructure and mass fraction of CNFs, the as-designed flexible pressure sensor dramatically achieves a high sensitivity of 769.2 kPa-1, a low detection limit of 5 Pa and high reliability of over 1000 cycles. Moreover, the flexible sensor based on CNF/SBS can be stretched due to the outstanding tensile properties of SBS. The enhanced stretchable sensor remarkably possesses a high gauge factor of 105.6 with a stretch range of 0%-300% and up to 600% elongation. Importantly, the proposed pressure and tension strain sensors are investigated to monitor vigorous human motion, revealing their tremendous potential for applications in flexible compressible and stretchable wearable electronics.

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Flexible and highly sensitive three-axis pressure sensors based on carbon nanotube/polydimethylsiloxane composite pyramid arrays

Cited by 35 publications

References 25 publications

Fabrication of conductive and superhydrophobic poly(lactic acid) nonwoven fabric for human motion detection

Fabrication of conductive and superhydrophobic poly(lactic acid) nonwoven fabric for human motion detection

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

A template-stripped carbon nanofiber/poly(styrene-butadiene-styrene) compound for high-sensitivity pressure and strain sensing

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