Ultrathin Self-Powered Heavy-Metal-Free Cu–In–Se Quantum Dot Photodetectors for Wearable Health Monitoring DOI

Shi Li,

Jae Hong Jang,

Wook‐Jin Chung

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(20), P. 20013 - 20023

Published: Oct. 3, 2023

Mechanically deformable photodetectors (PDs) are key device components for wearable health monitoring systems based on photoplethysmography (PPG). Achieving high detectivity, fast response time, and an ultrathin form factor in the PD is highly needed next-generation PPG systems. Self-powered operation without a bulky power-supply unit also beneficial point-of-care application. Here, we propose self-powered PDs using heavy-metal-free Cu-In-Se quantum dots (QDs), which enable high-performance Although light-absorbing QD layer extremely thin (∼40 nm), developed exhibits excellent performance (specific detectivity: 2.10 × 1012 Jones, linear dynamic range: 102 dB, spectral 250-1050 nm at zero bias), comparable to that of conventional rigid QD-PDs employing thick Pb-chalcogenide layers. This attributed material strategies─materials include QDs, MoS2-nanosheet-blended poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) hole transport layer, ZnO nanoparticle electron Ag ITO electrodes, (∼120 except electrodes) mechanical deformability. These allow successful application system real-time monitoring, expanding their potential field mobile bioelectronics.

Language: Английский

Decoupled Temperature–Pressure Sensing System for Deep Learning Assisted Human–Machine Interaction DOI
Zhaoyang Chen, Shun Liu,

Pengyuan Kang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(52)

Published: Aug. 20, 2024

Abstract With the rapid development of intelligent wearable technology, multimodal tactile sensors capable data acquisition, decoupling intermixed signals, and information processing have attracted increasing attention. Herein, a decoupled temperature–pressure dual‐mode sensor is developed based on single‐walled carbon nanotubes (SWCNT) poly(3,4‐ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) decorated porous melamine foam (MF), integrating with deep learning algorithm to obtain input terminal. Importantly, synergistic effect PEDOT:PSS SWCNT facilitates ideal capability sensitivity toward both temperature (38.2 µV K −1 ) pressure (10.8% kPa thermoelectric piezoresistive effects, respectively. Besides, low thermal conductivity excellent compressibility MF also endow it merits low‐temperature detection limit (0.03 K), fast response (120 ms), long‐term stability. Benefiting from outstanding sensing characteristics, assembled array showcases good capacity for identifying spatial distribution signals. assistance algorithm, displays high recognition accuracy 99% 98% corresponding “touch” “press” actions, respectively, realizes encrypted transmission accurate identification random sequences, providing promising strategy design high‐accuracy platform in human–machine interaction.

Language: Английский

Citations

27
Two-Stage Micropyramids Enhanced Flexible Piezoresistive Sensor for Health Monitoring and Human–Computer Interaction DOI

Zhihao Chen,

Changming Qu, Jingjing Yao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(6), P. 7640 - 7649

Published: Feb. 2, 2024

High-performance flexible piezoresistive sensors are becoming increasingly essential in various novel applications such as health monitoring, soft robotics, and human–computer interaction. The evolution of the interfacial contact morphology determines sensing properties devices. introduction microstructures enriches effectively boosts sensitivity; however, limited compressibility conventional leads to rapid saturation sensitivity low-pressure range, which hinders their application. Herein, we present a sensor featuring two-stage micropyramid array structure, enhances while widening range. Owing synergistic enhancement effect resulting from sequential micropyramids heights, devices demonstrate remarkable performance, including boosting (30.8 kPa–1) over wide range (up 200 kPa), fast response/recovery time (75/50 ms), an ultralong durability 15,000 loading–unloading cycles. As proof concept, is applied detect human physiological motion signals, further demonstrating real-time spatial pressure distribution system game control system, showing great potential for monitoring

Language: Английский

Citations

23
Convolutional Neural Networks‐Motivated High‐Performance Multi‐Functional Electronic Skin for Intelligent Human‐Computer Interaction DOI

Shixiang Wu,

Hao Kan, Jianqiang Gao

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109313 - 109313

Published: Jan. 20, 2024

Language: Английский

Citations

21
Self‐Powered Flexible Sensor Array for Dynamic Pressure Monitoring DOI
Li Wu, Jiangtao Xue,

Jianping Meng

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(28)

Published: March 10, 2024

Abstract Flexible pressure sensors are valuable in applications such as electronic skin, smart robots, artificial prosthetics, and wearable electronics. In this study, a fully packaged, flexible, self‐powered, long‐term stable sensor array based on piezoelectrets is developed for monitoring. A with microcavity structure thickness of 500 µm achieved an impressive piezoelectric coefficient 23.8 pC N −1 fast response time 93 ms. The yielded output voltage 0.26 V when subjected to force using 0.3 g soybeans, it displayed remarkable linear relationship (R 2 = 0.992) between electricity ranging from 1.4 13.6 sensitivity 9 mV . Real‐time monitoring sound vibration, radial artery pulse, finger movement demonstrated along the successful recording dynamic changes within porcine knee joint. It holds potential fields human bodies robotics can contribute significantly assessment during total replacement.

Language: Английский

Citations

21
Highly Sensitive Iontronic Pressure Sensor with Side‐by‐Side Package Based on Alveoli and Arch Structure DOI Creative Commons
Zhi Ding, Weijian Li, Weidong Wang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(24)

Published: March 15, 2024

Flexible pressure sensors play a significant role in wearable devices and electronic skin. Iontronic with high sensitivity, wide measurement range, resolution can meet requirements. Based on the deformation characteristics of alveoli to improve compressibility, ability arch disperse vertical into horizontal thrust increase contact area, graded hollow ball (GHBA) microstructure is proposed, greatly improving sensitivity. The fabrication GHBA ingeniously employs double-sided structure. One side uses mold casting create convex structures, while other utilizes evaporation moisture during curing process form concave structures. At same time, novel side-by-side package structure ensuring flexible substrate maximally transferred microstructure. Within range 0.2 Pa-300 kPa, iontronic sensor achieves maximum sensitivity 10 420.8 kPa

Language: Английский

Citations

19
Heterogeneously assembled bionic piezoresistive sensor for spinal behavior monitoring DOI

Xiarong Ren,

Shenglong Wang, Da Xiong

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149817 - 149817

Published: Feb. 20, 2024

Language: Английский

Citations

17
Degradable, biocompatible, and flexible capacitive pressure sensor for intelligent gait recognition and rehabilitation training DOI
Dedong Guo, Yuanlong Li, Qihui Zhou

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 127, P. 109750 - 109750

Published: May 18, 2024

Language: Английский

Citations

17
Flexible Pressure, Humidity, and Temperature Sensors for Human Health Monitoring DOI
Jiaqi Li,

Z. Fang,

Dongsong Wei

et al.

Advanced Healthcare Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 17, 2024

Abstract The rapid advancements in artificial intelligence, micro‐nano manufacturing, and flexible electronics technology have unleashed unprecedented innovation opportunities for applying sensors healthcare, wearable devices, human–computer interaction. human body's tactile perception involves physical parameters such as pressure, temperature, humidity, all of which play an essential role maintaining health. Inspired by the sensory function skin, many bionic been developed to simulate skin's various stimuli are widely applied health monitoring. Given urgent requirements sensing performance integration field devices monitoring, here is a timely overview recent advances multi‐functional It covers fundamental components categorizes them based on different response mechanisms, including resistive, capacitive, voltage, other types. Specifically, application these area monitoring highlighted. Based this, extended dual/triple‐mode integrating temperature presented. Finally, challenges discussed.

Language: Английский

Citations

17
Innovations in Tactile Sensing: Microstructural Designs for Superior Flexible Sensor Performance DOI

Guancheng Wu,

Xiang Li, Rongrong Bao

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: June 22, 2024

Abstract Tactile sensors have garnered considerable interest for their capacity to detect and quantify tactile information. The incorporation of microstructural designs into flexible has emerged as a potent strategy augment sensitivity pressure variations, thereby enhancing linearity, response spectrum, mechanical robustness. This review underscores the imperative progress in microstructured sensors. Subsequently, discourse transitions prevalent materials employed fabrication sensor electrodes, encapsulation layers, active sensing mediums, elucidating merits limitations. In‐depth discussions are devoted adorned with microstructures, including but not limited to, micropyramids, microhemispheres, micropillars, microporous configurations, microcracks, topological interconnections, multilevel constructs, random roughness, biomimetic microstructures inspired by flora fauna, accompanied exemplar studies from each category. Moreover, utility within realm intelligent environments is explicated, highlighting application monitoring physiological signals, detection sliding motions, discernment surface textures. culminates critical examination paramount challenges predicaments that must be surmounted further development enhance functional performance sensors, paving way integration advanced sensory systems.

Language: Английский

Citations

16
Research Progress of Flexible Piezoresistive Sensors Based on Polymer Porous Materials DOI

Song Han,

Sheng Li, Xin Fu

et al.

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(8), P. 3848 - 3863

Published: July 24, 2024

Flexible piezoresistive sensors are in high demand areas such as wearable devices, electronic skin, and human-machine interfaces due to their advantageous features, including low power consumption, excellent bending stability, broad testing pressure range, simple manufacturing technology. With the advancement of intelligent technology, higher requirements for sensitivity, accuracy, response time, measurement weather resistance emerging. Due designability polymer porous materials conductive phases, with more multivariate combinations, it is possible achieve sensitivity lower detection limits, which promising than traditional flexible sensor materials. Based on this, this work reviews recent advancements research utilizing Furthermore, review examines performance optimization development from perspectives three-dimensional substrate regulation, sensing material selection composite structure design.

Language: Английский

Citations

16