Reduced Graphene Oxide-Polypyrrole Aerogel-Based Coaxial Heterogeneous Microfiber Enables Ultrasensitive Pressure Monitoring of Living Organisms

Jiang, Qianqian; Ma, Xinlei; Chai, Yunfeng; Ma, Hui; Tang, Feng; Hua, Kun; Chen, Ruoqi; Jin, Zhaoxia; Wang, Xusheng; Ji, Junhui; Yang, Xinying; Lian, Huiqin; Xue, Mianqi

doi:10.1021/acsami.0c19949

Cited by 27 publications

(14 citation statements)

References 54 publications

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“…To the best of our knowledge, the sensitivity of this present sensor is better than most previously reported graphene-based aerogel piezoresistive sensors under pressure less than 500 Pa (Figure 4f). [36][37][38][39][40][41] For piezoresistive sensors, durability is another essential feature to assess the device's performance. In order to evaluate the stability and durability of aPANFs/MX-rGA as a piezoresistive sensor, 17 000 cycles of compression experiments were performed under a pressure of 125 Pa. As presented in Figure 5a, the sensor could maintain a high signal strength after 17 000 compression cycles, powerfully demonstrating its excellent structural stability and durability.…”

Section: Resultsmentioning

confidence: 99%

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Ultralight and Hyperelastic Nanofiber‐Reinforced MXene–Graphene Aerogel for High‐Performance Piezoresistive Sensor

Niu

Qin

Min

et al. 2021

Adv Materials Technologies

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flexible deformation methods, excellent stability, and easy assembly. [17][18][19] Generally, piezoresistive sensors work on the principle of regulating the internal structure of conductive materials to cause a change in resistance. [20] Therefore, constructing suitable conductive materials is crucial in developing high-performance piezoresistive sensors.Recently, 3D aerogel-based conductive materials have been regarded as ideal candidates for piezoresistive sensors due to their high porosity, good elasticity, and low density. [21] The selection of sensing materials in conductive aerogels is generally focused on nanoparticles, conductive polymers, and carbon materials. [22][23][24] Among them, graphene-based aerogel plays a vital role in piezoresistive sensors due to its unique physical and chemical properties. [25] However, the poor conductivity of graphene aerogel always causes low sensitivity in the piezoresistive sensor, which significantly limits its practical application in the sensing field.MXene is a graphene-like 2D material composed of transition metal carbides/nitrides or carbides. [26] The general chemical formula of MXene is M n+1 X n T x , where M is a transition metal, X is C or N, and T x represents a functional group. The good electrical conductivity of MXene enables it to be a potential alternative for piezoresistive sensor sensing materials. [27] Unfortunately, similar to other 2D materials, MXene is easy to stack, which may reduce the service life of the piezoresistive devices. Besides, the low aspect ratio and weak gelling ability of MXene nanosheets make it difficult to form a continuous porous structure. [28] Though intense efforts have been made to apply MXene to piezoresistive sensors, [29] it is still a big challenge to prepare MXene-based aerogels as piezoresistive sensors with high sensing performance, fast response time, and excellent fatigue resistance.Herein, we report our success in realizing a highperformance piezoresistive device based on nanofiberreinforced MXene-reduced graphene oxide (rGO) aerogel (named alkaline-treated polyacrylonitrile nanofibers (aPANFs)/ MX-rGA). The aPANFs/MX-rGA has a 3D interconnected porous structure, in which alkaline-treated polyacrylonitrile 3D aerogel-based piezoresistive sensors have attracted tremendous attention due to their high sensitivity and excellent mechanical properties. Here, a novel piezoresistive sensor with ultrahigh linear sensitivity is tactfully designed and prepared based on nanofiber-reinforced MXene-reduced graphene oxide aerogel. The presence of MXene endows the piezoresistive sensor with high conductivity. Besides, the nanofibers can act as a scaffold to improve the compression resilience of the aerogel significantly by penetrating the entire aerogel network. Furthermore, due to the synergy effect among the multiple components, the prepared piezoresistive sensor exhibits outstanding performance, including high linear sensitivity (331 kPa −1 from 0 to 500 Pa, 126 kPa −1 from 500 Pa to 7.5 kPa), fast response time (load 71 ms, ...

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Section: Resultsmentioning

confidence: 99%

“…To the best of our knowledge, the sensitivity of this present sensor is better than most previously reported graphene‐based aerogel piezoresistive sensors under pressure less than 500 Pa (Figure 4f). [ 36–41 ]…”

Section: Resultsmentioning

confidence: 99%

Ultralight and Hyperelastic Nanofiber‐Reinforced MXene–Graphene Aerogel for High‐Performance Piezoresistive Sensor

Niu

Qin

Min

et al. 2021

Adv Materials Technologies

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“…In general, porous RGO materials are well known to be sensitive to various stimuli from physical stimuli such as pressure, distance to chemical stimuli such as gas and water vapor, heat, biomolecules. [31][32][33][34][35][36][37][38][39][40][41] In this paper, the key effect factor of reducing the change of UVA photoresponse under various physical/chemical stimuli. By using polydimethylsiloxane (PDMS) as an encapsulation material, we developed a high-performance wearable UVA photodetector, which shows the good device performances under various stimuli and environmental conditions.…”

Section: The Structure and Environmental Stability Of Pdms Encapsulat...mentioning

confidence: 99%

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

Lee

Hong

Yang

et al. 2021

Adv Materials Technologies

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Real‐time and continuous monitoring of ultraviolet (UV) radiation in daily activity is critical in diverse fields ranging from personal fitness, cosmetics, to medical aspects. Here, a wearable UV monitoring patch that can be easily fixed/removed at desired locations and provide real‐time and continuous UVA levels in daily life is developed. The wearable patch consists of a highly sensitive, flexible graphene sensor for UVA measurement and a multifunctional fabric patch integrated with commercial electronic components for signal processing, wireless transmission. To achieve a high sensitive UVA sensor with high flexibility and long‐term stability, porous reduced graphene oxide (pRGO) papers are fabricated by simple solvent evaporation followed by thermochemical reduction. The flexible UVA sensors based on pRGO papers feature a high UVA photoresponsivity of 125 mA W−1, which is comparable to that of a commercial silicon‐based UV sensor. Furthermore, the polydimethylsiloxane‐encapsulated pRGO (PDMS‐pRGO) sensors exhibit stable UVA photoresponse characteristics that is maintained under severe conditions, such as a large number of bending cycles, thermal heating, and high humidity. The use of wearable patches that enable real‐time, wireless monitoring of personal UVA levels in various practical applications are demonstrated.

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“…Hence, on the whole, the external microdistance changes the thickness of the textile, exhibiting a decrease of resistance for the conductive textile. [36,[40][41][42] Therefore, the introduction of PPy film on high-elasticity PET fibers substantially enhance the performance of microdistance sensor, providing a simple, low-cost and accurate scheme for microdistance measurement.…”

Section: The Sensing Mechanism Of the Microdistance Sensormentioning

confidence: 99%

A Polyester/Polypyrrole Textile‐Based Ultrasensitive Wearable Microdistance Sensor

Chen

Chai

et al. 2021

Macro Materials & Eng

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Microdistance sensor, which can accurately detect the microdistance change, possesses significant applications in the cutting-edge technologies including biomedicine, energy storage, and info-communications. However, the high cost, complicated operation, and stringent testing requirements of the existing microdistance sensors limit their widespread application in the frontier fields, especially for the intelligent wearable electronics. Herein, a novel mechanism to detect microdistance change is developed, in which the external microdistance brings a change in the thickness of conductive textile and further converts into a distinguishable electrical signal. The polyester/polypyrrole (PET/PPy) conductive textile is fabricated via in situ solventless polymerization, and the derived microdistance sensor exhibits an ultrahigh sensitivity of 179 m −1 within the detection region of 10-480 μm, a high resolution up to 5 μm, and good stability. The excellent sensing performance can be attributed to the high elasticity, deformation-recovery property, and 3D network structures of the PET/PPy conductive textile. Furthermore, the wearable sensor is applied to detect the microdistance changes in human and robot activities, providing an efficient and low-cost solution for microdistance detection in intelligent medical, health monitoring system, and biomimetic robot.

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Reduced Graphene Oxide-Polypyrrole Aerogel-Based Coaxial Heterogeneous Microfiber Enables Ultrasensitive Pressure Monitoring of Living Organisms

Cited by 27 publications

References 54 publications

Ultralight and Hyperelastic Nanofiber‐Reinforced MXene–Graphene Aerogel for High‐Performance Piezoresistive Sensor

Ultralight and Hyperelastic Nanofiber‐Reinforced MXene–Graphene Aerogel for High‐Performance Piezoresistive Sensor

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

A Polyester/Polypyrrole Textile‐Based Ultrasensitive Wearable Microdistance Sensor

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