Versatile MXene integrated assembly for piezoresistive micro‐force sensing

Wang, Shenglong; Lan, Boling; Gao, Yuyu; Xie, Yongbing; He, Hanyu; Xiong, Deping; Tian, Guo; Yang, Tao; Huang, Junfeng; Ao, Yong; Sun, Yue; Yang, Weiqing; Deng, Weili

doi:10.1002/viw.20220031

Cited by 14 publications

(12 citation statements)

References 41 publications

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“…From the scanning electron microscopy (Figure S6, Supporting Information) and X‐ray diffraction pattern (Figure S7, Supporting Information), it can be seen that the blocky MAX has been successfully exfoliated into layered MXene, as subsequently demonstrated by the Tyndall effect observed in the MXene nanosheets solution (Figure S8, Supporting Information), which is favorable for spraying. [ 48 ] Furthermore, the TEM image (Figure 2b) indicates that the lateral dimensions of MXene nanosheets are several hundred nanometers and the crystal structure is hexagonal. [ 49 ] Before spraying, the BIS film was treated with oxygen plasma to enhance its hydrophilicity (Figure S9, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Bioinspired MXene‐Based Piezoresistive Sensor with Two‐stage Enhancement for Motion Capture

Wang

Deng

Yang

et al. 2023

Adv Funct Materials

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Structured piezoresistive membranes are compelling building blocks for wearable bioelectronics. However, the poor structural compressibility of conventional microstructures leads to rapid saturation of detection range and low sensitivity of piezoresistive devices, limiting their commercial applications. Herein, a bioinspired MXene-based piezoresistive device is reported, which can effectively boost the sensitivity while broadening the response range by architecting intermittent villus-like microstructures. Benefitting from the two-stage amplification effect of this intermittent architecture, the developed MXene-based piezoresistive bioelectronics exhibit a high sensitivity of 461 kPa −1 and a broad pressure detection range of up to 311 kPa, which are about 20 and 5 times higher than that of the homogeneous microstructures, respectively. Cooperating with the deep-learning algorithm, the designed bioelectronics can effectively capture complex human movements and precisely identify human motion with a high recognition accuracy of 99%. Evidently, this intermittent architecture of biomimetic strategy may pave a promising avenue to overcome the limitation of rapid saturation and low sensitivity in piezoresistive bioelectronics, and provide a general way to promote its largescale applications.

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Section: Resultsmentioning

confidence: 99%

Bioinspired MXene‐Based Piezoresistive Sensor with Two‐stage Enhancement for Motion Capture

Wang

Deng

Yang

et al. 2023

Adv Funct Materials

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“…(F) Response and recovery curve of flexible sensing device based on MXene/PDA at P = 0.36 kPa, (G) linear sensitivity at a wide pressure range of 0.18–6.20 kPa, (H) the detailed durability performance under a pressure of striking. (I) Comparison of pressure‐sensitive responses of flexible pressure sensor 16,34–41 …”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 3F, the MXene/PDAbased flexible sensor exhibits fast response/recovery speeds of 100 and 50 ms, respectively. Because the spherical structure of PDA has good deformation performance, PDA is easy to be affected by external pressure, the current 16,[34][35][36][37][38][39][40][41] changes greatly, and when the external force is withdrawn, the process of PDA deformation recovery is very fast, so the pressure will cause the rapid deformation of the composite membrane. The fast response and recovery capabilities ensure timely and flexible sensing under the action of external forces.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3I compares the sensitivity obtained in this study with that reported in the literature. 16,[34][35][36][37][38][39][40][41] Compared with other MXene-based flexible sensors, MXene/PDA-based pressure sensors generally exhibit higher sensitivity, such as MXene/PVB-based porous composite sensor (S 1 = 11.9 kPa −1 , S 2 = 1.15 kPa −1 , S 3 = 0.20 kPa −1 ), Ti 3 C 2 Tx/PVDF-TrFE-based composite nanofiber sensor (0.51 kPa −1 ), elastic microstructure-based MXene/PDMS thin film sensor (S 1 = 2 kPa −1 , S 2 = 0.003 kPa −1 ) MXene@CS@PUbased pressure sensor (3 kPa −1 ), pressure sensor based on MXene/cotton (12.095 kPa −1 ), pressure sensor based on MXene/PI (22.32 kPa −1 ), thin-film sensor based on LS-MXene/PVA (S 1 = 5.5 kPa −1 , S 2 = 1.5 kPa −1 ), elastic aerogels of MXene/rGO (22.56 kPa −1 ) and pure MXenebased thin film sensor. In addition, the response and reply times of our proposed sensor are shorter than those mentioned above, enabling higher-accuracy detection.…”

Section: Resultsmentioning

confidence: 99%

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Smart MXene‐based bioelectronic devices as wearable health monitor for sensing human physiological signals

Han

Zou

et al. 2023

VIEW

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Biosafe wearable healthcare monitor has attracted significant attention owing to their applicability to wearable electronics. However, the narrow sensing range and poor response limit the application of flexible devices for comprehensive monitoring of human health‐related physiological signals (i.e., pulse diagnosis). Critical challenges remain in the development of biocompatible materials and the design of flexible bio‐integrated platforms for these purposes, targeting performance approaching those of conventional wafer‐based technologies and long‐term operational stability. In this context, this work presents a robust and flexible MXene/polydopamine (PDA)‐composite‐film‐based pressure sensor in a portable/wearable fashion, which establishes a unique intercalated spherical‐like PDA molecules structure, thereby resulting in excellent sensing performance. The MXene/PDA‐based pressure sensor has sensitivity of up to 138.8 kPa−1 in the pressure range of 0.18–6.20 kPa with fast response and recovery speed (t1 < 100 ms; t2< 50 ms). Associated embodiment involves real‐time precise measurements of a variety of health‐related physiological signals, ranging from wrist pulse, to finger motions, to vocalization and to facial expressions, with high sensitivity and accuracy. Studies on human subjects establish the clinical significance of these devices for future opportunities of health monitoring and intelligent control to predict and diagnose diseases.

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“…Figure 3i compares the sensitivity obtained in this study with that reported in the literature. [14,32,33,[37][38][39][40][41][42] Compared with other MXene-based flexible sensors, MXene/PDA-based pressure sensors generally exhibit higher sensitivity, such as MXene/PVB-based porous composite sensor (S 1 =11.9 kPa -1 , S 2 =1.15 kPa -1 , S 3 =0.20 kPa -1 ), Ti 3 C 2 Tx/PVDF-TrFE-based composite nanofiber sensor (0.51 kPa -1 ), elastic microstructure-based MXene/PDMS thin film sensor (S 1 =2 kPa -1 , S 2 =0.003 kPa -1 ) MXene@CS@PU-based pressure sensor (3 kPa -1 ), pressure sensor based on MXene/Cotton (12.095 kPa -1 ), pressure sensor based on MXene/PI (22.32 kPa -1 ), thin-film sensor based on LS-MXene/PVA (S 1 =5.5 kPa -1 , S 2 =1.5 kPa -1 ), elastic aerogels of MXene/rGO (22.56 kPa -1 ) and pure MXene-based thin film sensor. In addition, the response and reply times of our proposed sensor are shorter than those mentioned above, enabling higher-accuracy detection.…”

Section: Resultsmentioning

confidence: 99%

Smart MXene-based Bioelectronic Devices as Wearable Self-powered Health Monitor for Sensing Human Physiological Signals

Han

Zou

et al. 2023

Preprint

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Biosafe wearable healthcare monitor has attracted significant attention owing to their applicability to wearable electronics. However, the narrow sensing range and poor response limit the application of flexible devices for comprehensive monitoring of human health-related physiological signals (i.e. pulse diagnosis). Critical challenges remain in the development of biocompatible materials and the design of flexible bio-integrated platforms for these purposes, targeting performance approaching those of conventional wafer-based technologies and long-term operational stability. In this context, this work presents a robust and flexible MXene/polydopamine (PDA)-composite-film-based pressure sensor in a portable/wearable fashion, which establishes a unique intercalated spherical-like PDA molecules structure, thereby resulting in excellent sensing performance. The MXene/PDA-based pressure sensor has sensitivity of up to 138.8 kPa-1 in the pressure range of 0.18-6.20 kPa with fast response and recovery speed (t1<100 ms; t2<50 ms). Associated embodiment involves real-time precise measurements of a variety of health-related physiological signals, ranging from wrist pulse, to finger motions, to vocalization and to facial expressions, with high sensitivity and accuracy. Studies on human subjects establish the clinical significance of these devices for future opportunities of health monitoring and intelligent control to predict and diagnose diseases.

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Versatile MXene integrated assembly for piezoresistive micro‐force sensing

Cited by 14 publications

References 41 publications

Bioinspired MXene‐Based Piezoresistive Sensor with Two‐stage Enhancement for Motion Capture

Bioinspired MXene‐Based Piezoresistive Sensor with Two‐stage Enhancement for Motion Capture

Smart MXene‐based bioelectronic devices as wearable health monitor for sensing human physiological signals

Smart MXene-based Bioelectronic Devices as Wearable Self-powered Health Monitor for Sensing Human Physiological Signals

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