A highly sensitive piezoresistive sensor based on MXenes and polyvinyl butyral with a wide detection limit and low power consumption

Qin, Ruzhan; Hu, Mingjun; Li, Xin; Li, Yan; Wu, Chuanguang; Liu, Jinzhang; Gao, Hongze; Shan, Guangcun; Huang, Wei

doi:10.1039/d0nr02012e

Cited by 64 publications

(65 citation statements)

References 52 publications

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“…[65][66][67][68]70 In addition to the chemical sensing, MXenebased piezoresistive sensors are another type of devices for exploration (Figure 13d). 27,69,71 The fast and reversible change of conductive network under external pressure results in sensitive change in the resistance of the material, yielding reliable electromechanical sensing performance. With the aid of in situ transmission electron microscope (TEM) observation, both the compression of nanopores and interlayer space were proposed as the mechanism for piezoresistive response in MXenes.…”

Section: Intercalation Chemistry In the Applications Of Mxenesmentioning

confidence: 99%

Host–Guest Intercalation Chemistry in MXenes and Its Implications for Practical Applications

Chen

2021

ACS Nano

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The ever-increasing demand on developing layered materials for practical applications, such as electrochemical energy storage, responsive materials, nanofluidics, and environmental remediation, requires the profound understanding and artful exploitation of interlayer engineering or intercalation chemistry. The past decade has witnessed the massive exploration of a recently discovered 2D materialtransition metal carbides, carbonitrides, and nitrides (referred to as MXenes), which began to take hold of a myriad of applications owing to the abundant possibilities on their compositions and intercalation states. However, application-targeted manipulation of the material performance of MXenes is constrained by the dearth of deep comprehension on fundamental intercalation chemistry/physics. To this end, the aim of this review is to provide a holistic discussion on the intercalation chemistry in MXenes and the physical properties of MXene intercalation compounds. On the basis of this, potential solutions for the challenges confronted in the synthesis, tuning of material properties, and practical applications are proposed, which are also expected to reinvigorate the exploration of layered materials that are similar to MXenes.

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Section: Intercalation Chemistry In the Applications Of Mxenesmentioning

confidence: 99%

Host–Guest Intercalation Chemistry in MXenes and Its Implications for Practical Applications

Chen

2021

ACS Nano

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“…With the increasing demand for wearable devices, high-performance flexible pressure sensors have attracted wide attention. Pressure sensors can be divided into piezoresistive 2 , piezoelectric 3 , capacitive 4 and triboelectric effect sensors 5 , 6 . Capacitive sensors have become the focus of current research due to their fast dynamic response, excellent temperature insensitivity and low power consumption 7 .…”

Section: Introductionmentioning

confidence: 99%

A new strategy for the fabrication of a flexible and highly sensitive capacitive pressure sensor

Qin

et al. 2021

Microsyst Nanoeng

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The development of flexible capacitive pressure sensors has wide application prospects in the fields of electronic skin and intelligent wearable electronic devices, but it is still a great challenge to fabricate capacitive sensors with high sensitivity. Few reports have considered the use of interdigital electrode structures to improve the sensitivity of capacitive pressure sensors. In this work, a new strategy for the fabrication of a high-performance capacitive flexible pressure sensor based on MXene/polyvinylpyrrolidone (PVP) by an interdigital electrode is reported. By increasing the number of interdigital electrodes and selecting the appropriate dielectric layer, the sensitivity of the capacitive sensor can be improved. The capacitive sensor based on MXene/PVP here has a high sensitivity (~1.25 kPa−1), low detection limit (~0.6 Pa), wide sensing range (up to 294 kPa), fast response and recovery times (~30/15 ms) and mechanical stability of 10000 cycles. The presented sensor here can be used for various pressure detection applications, such as finger pressing, wrist pulse measuring, breathing, swallowing and speech recognition. This work provides a new method of using interdigital electrodes to fabricate a highly sensitive capacitive sensor with very promising application prospects in flexible sensors and wearable electronics.

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“…The sensitivity of our sensor is higher than that of the pristine MXene film (Figure S5, Supporting Information) and the previously reported MXene‐based sensor (Figure 3f) and Table S1 (Supporting Information). [ 17,35–43 ] We further attempted to monitor the sensor in a lower pressure range. As shown in Figure S6a (Supporting Information), the flexible sensor creates accurate differentiation for different pressures within the pressure range of 0–61 Pa, and a good linear relationship is maintained for the I – V curves.…”

Section: Resultsmentioning

confidence: 99%

Controlled Assembly of MXene Nanosheets as an Electrode and Active Layer for High‐Performance Electronic Skin

Wang

Zhao

et al. 2021

Adv Funct Materials

171

107

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MXenes are an emerging class of 2D transition metal carbides and nitrides. They have been widely used in flexible electronics owing to their excellent conductivity, mechanical flexibility, and water dispersibility. In this study, the electrode and active layer applications of MXene materials in electronic skins are realized. By utilizing vacuum filtration technology, few‐layer MXene electrodes are integrated onto the top and bottom surfaces of the 3D polyacrylonitrile (PAN) network to form a stable electronic skin. The fabricated flexible device with Ti3C2Tx MXene electrodes outperforms those with other electrodes and exhibits excellent device performance, with a high sensitivity of 104.0 kPa−1, fast response/recovery time of 30/20 ms, and a low detection limit of 1.5 Pa. Furthermore, the electrode and the constructed MXene/PAN‐based flexible pressure sensor exhibit robust mechanical stability and can survive 240 bending cycles. Such a robust, flexible device can be enlarged or folded like a jigsaw puzzle or origami and transformed from 2D to 3D structures; moreover, it can detect tiny movements of human muscles, such as movements corresponding to sound production and intense movements during bending of fingers.

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A highly sensitive piezoresistive sensor based on MXenes and polyvinyl butyral with a wide detection limit and low power consumption

Abstract: A highly flexible and highly sensitive piezoresistive sensor was fabricated by using MXenes and polyvinyl butyral.

Cited by 64 publications

References 52 publications

Host–Guest Intercalation Chemistry in MXenes and Its Implications for Practical Applications

Host–Guest Intercalation Chemistry in MXenes and Its Implications for Practical Applications

A new strategy for the fabrication of a flexible and highly sensitive capacitive pressure sensor

Controlled Assembly of MXene Nanosheets as an Electrode and Active Layer for High‐Performance Electronic Skin

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