Compressible AgNWs/Ti3C2Tx MXene aerogel-based highly sensitive piezoresistive pressure sensor as versatile electronic skins

Bi, Lili; Yang, Zhonglin; Chen, Liangjun; Wu, Zhen; Cui, Yun

doi:10.1039/d0ta07044k

Cited by 102 publications

(78 citation statements)

References 46 publications

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“…As for the human body motion detection, it can be Recently, the investigations on functional aerogels have aroused great interests due to their special micro structure. [50][51][52][53][54][55] Here, based on the low density and porous structure of the prepared PINF/MXene composite aerogel, its wettability was then systematically investigated to disclose its application for oil/water separation. Clearly, as shown in Figure 6A and Video S3, Supporting Information, the surface of the composite aerogel immersed in water displays strong light reflection, which is caused by the trapped air layer that lead to the total light reflection, preventing it from being wetted effectively.…”

Section: Resultsmentioning

confidence: 99%

Lightweight, Superelastic, and Hydrophobic Polyimide Nanofiber /MXene Composite Aerogel for Wearable Piezoresistive Sensor and Oil/Water Separation Applications

Liu

Chen

Zheng

et al. 2021

Adv Funct Materials

364

251

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Inspired by the ultralight and structurally robust spider webs, flexible nanofibril‐assembled aerogels with intriguing attributes have been designed for achieving promising performances in various applications. Here, conductive polyimide nanofiber (PINF)/MXene composite aerogel with typical “layer‐strut” bracing hierarchical nanofibrous cellular structure has been developed via the freeze‐drying and thermal imidization process. Benefiting from the porous architecture and robust bonding between PINF and MXene, the PINF/MXene composite aerogel exhibits an ultralow density (9.98 mg cm−3), intriguing temperature tolerance from ‐50 to 250 °C, superior compressibility and recoverability (up to 90% strain), and excellent fatigue resistance over 1000 cycles. The composite aerogel can be used as a piezoresistive sensor, with an outstanding sensing capacity up to 90% strain (corresponding 85.21 kPa), ultralow detection limit of 0.5% strain (corresponding 0.01 kPa), robust fatigue resistance over 1000 cycles, excellent piezoresistive stability and reproductivity in extremely harsh environments. Furthermore, the composite aerogel also exhibits superior oil/water separation properties such as high adsorption capacity (55.85 to 135.29 g g−1) and stable recyclability due to its hydrophobicity and robust hierarchical porous structure. It is expected that the designed PINF/MXene composite aerogel can supply a new multifunctional platform for human bodily motion/physical signals detection and high‐efficient oil/water separation.

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Section: Resultsmentioning

confidence: 99%

Lightweight, Superelastic, and Hydrophobic Polyimide Nanofiber /MXene Composite Aerogel for Wearable Piezoresistive Sensor and Oil/Water Separation Applications

Liu

Chen

Zheng

et al. 2021

Adv Funct Materials

364

251

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“…The polyol method is considered as the most promising and adaptable method with respect to yield, cost, simplicity, and reaction time for the preparation of AgNWs with higher aspect ratios [24][25][26][27]. This method involves the reduction of metallic salts in the presence of a polyol.…”

Section: Introductionmentioning

confidence: 99%

High-yield synthesis of silver nanowires for transparent conducting PET films

Naz¹,

Asghar²,

Ramzan³

et al. 2021

Beilstein J. Nanotechnol.

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Silver nanowires (AgNWs) with ultrahigh purity and high yield were successfully synthesized by employing a modified facile polyol method using PVP as a capping and stabilizing agent. The reaction was carried out at a moderate temperature of 160 °C under mild stirring for about 3 h. The prepared AgNWs exhibited parallel alignment on a large scale and were characterized by UV–vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), and PL spectroscopy. The luminescent AgNWs exhibited red emission, which was accredited to deep holes. The SEM results confirmed the formation of AgNWs of 3.3 to 4.7 µm in length with an average diameter of about 86 nm, that is, the aspect ratio values of the AgNWs exceeded 45. An ink consisting of hydroxyethyl cellulose (HEC) and AgNWs was transferred to polyethylene terephthalate (PET) films by simple mechanical pressing. The PET films retained transparency and flexibility after the ink coating. The maximum transmittance value of as-prepared PET films in the visible region was estimated to be about 92.5% with a sheet resistance value of ca. 20 Ω/sq. This makes the films a potential substitute to commonly used expensive indium tin oxide (ITO) in the field of flexible optoelectronics.

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“…In practical application, wearable pressure sensors with ultra-low detection limit, high sensitivity, wide detection range and long-term durability are very important (Wang et al 2020). In order to realize the excellent performance of piezoresistive pressure sensors, the innovative structure strategy of constructing three-dimensional (3D) and porous conductive aerogels has been developed (Bi et al 2020; Wang et al 2020). These 3D and porous conductive aerogels have the advantages of large speci c surface area, light weight, and large compressed space, and have become a promising material for wearable piezoresistive pressure sensors (Si et al 2016;Xiao et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Wearable Pressure Sensors Based on Carbonized Graphene Coated Waste Paper Aerogel

Li¹,

Cui²,

Wang³

et al. 2021

Preprint

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Graphene is complexed with cellulose fibers to construct 3D aerogels, which is generally considered to be an environmentally friendly and simple strategy to achieve wide sensing, high sensitivity and low detection of wearable piezoresistive pressure sensors. Here, graphene is incorporated into waste paper fibers with cellulose as the main component to prepare graphene coated waste paper aerogel (GWA) using a simple “filtration-oven drying” method under atmospheric pressure. The GWA was further annealed to obtain the carbonized graphene coated waste paper aerogel (C-GWA) to achieve low density and excellent resilience. The result shows that the C-GWA has a rough outer surface due to the 3D structure formed by interpenetrated fibers and the carbon skeleton with wrinkles. The sensor based on GCA shows low density (25mg/cm3), a wide detection range of 0-132 kPa, an ultra-low detection limit of 2.5 Pa (a green bean, ≈ 53.4 mg), and a high sensitivity of 31.6 kPa− 1. In addition, the sensor based on C-GWA with the excellent performance can be used to detect human motions including the pulse of the human body, cheek blowing and bending of human joints. The result indicates that the sensor based on C-GWA shows great potential for wearable electronic products.

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Compressible AgNWs/Ti₃C₂T_x MXene aerogel-based highly sensitive piezoresistive pressure sensor as versatile electronic skins

Abstract: Wearable pressure sensor as electronic skins have been intensively studied, while versatile electronic skins stimulate the demands for highly sensitive piezoresistive sensing system over ultrawide pressure range. Herein, a wearable...

Cited by 102 publications

References 46 publications

Lightweight, Superelastic, and Hydrophobic Polyimide Nanofiber /MXene Composite Aerogel for Wearable Piezoresistive Sensor and Oil/Water Separation Applications

Lightweight, Superelastic, and Hydrophobic Polyimide Nanofiber /MXene Composite Aerogel for Wearable Piezoresistive Sensor and Oil/Water Separation Applications

High-yield synthesis of silver nanowires for transparent conducting PET films

Wearable Pressure Sensors Based on Carbonized Graphene Coated Waste Paper Aerogel

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