1
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Zhou B, Yang X, Liu J, Lan L, Lu H, Wang Y, Wei Z, Zhang X. Jellyfish-Inspired Self-Healing Luminescent Elastomers Based on Borate Nanoassemblies for Dual-Model Encryption. NANO LETTERS 2024; 24:8198-8207. [PMID: 38904269 DOI: 10.1021/acs.nanolett.4c02512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Responsive luminescent materials that reversibly react to external stimuli have emerged as prospective platforms for information encryption applications. Despite brilliant achievements, the existing fluorescent materials usually have low information density and experience inevitable information loss when subjected to mechanical damage. Here, inspired by the hierarchical nanostructure of fluorescent proteins in jellyfish, we propose a self-healable, photoresponsive luminescent elastomer based on dynamic interface-anchored borate nanoassemblies for smart dual-model encryption. The rigid cyclodextrin molecule restricts the movement of the guest fluorescent molecules, enabling long room-temperature phosphorescence (0.37 s) and excitation wavelength-responsive fluorescence. The building of reversible interfacial bonding between nanoassemblies and polymer matrix together with their nanoconfinement effect endows the nanocomposites with excellent mechanical performances (tensile strength of 15.8 MPa) and superior mechanical and functional recovery capacities after damage. Such supramolecular nanoassemblies with dynamic nanoconfinement and interfaces enable simultaneous material functionalization and self-healing, paving the way for the development of advanced functional materials.
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Affiliation(s)
- Bo Zhou
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Xin Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Jize Liu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Lidan Lan
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Hao Lu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Yuyan Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Zhenbo Wei
- College of Electrical Engineering, Sichuan University, Chengdu 610065, China
| | - Xinxing Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
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2
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Wu XP, Luo XM, Chen HL, Man Y, Bai YY, Qin TZ, Zhang B, Zhang GP. Fatigue crack-based strain sensors achieving flow detection and motion monitoring for reconnaissance robot applications. MATERIALS HORIZONS 2024. [PMID: 38915265 DOI: 10.1039/d4mh00419a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Crack-based flexible strain sensors with ultra-high sensitivity under tiny strain are highly desired for environmental perception and motion detection of novel flexible and miniature robots. However, previously reported methods for fabricating crack patterns have often sacrificed the cyclic stability of the sensor, leading to a trade-off relationship between the sensitivity and the cyclic stability. Here, a universal and simple strategy based on fatigue loading with an ultra-large cumulative strain of up to ∼1.2 × 107%, rather than the traditionally quasi-static pre-overloading methods, is proposed to introduce channel cracks in the sensing layer without sacrificing the cyclic stability. The developed flexible strain sensors exhibit high strain-sensitivity (gauge factor = 5798) under tiny strain (< 3%), high cyclic stability (15 000 cycles) and a low strain detecting limit (0.02%). Furthermore, a leaf-like mechanosensor is developed using the fatigue crack-based strain sensor for the realization of multifunctional applications in environment perception and micro-motion detection. Brilliant airflow sensing performance with a wide sensing range (0.93-11.93 m s-1) and a fast response time (0.28 s) for amphibious applications is demonstrated. This work provides a new strategy for overcoming limits of crack-based flexible strain sensors and the developed leaf-like mechanosensor shows great application potential in miniature and flexible reconnaissance robots.
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Affiliation(s)
- Xu-Ping Wu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
- School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
| | - Xue-Mei Luo
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
| | - Hong-Lei Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
| | - Yi Man
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
- School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
| | - Yao-Yao Bai
- Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, School of Materials Science and Engineering, Northeastern University, 3-11 Wenhua Road, Shenyang 110819, China
| | - Tian-Ze Qin
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
- School of Materials Science and Engineering, University of Science and Technology of China, 72 Wenhua Road, Shenyang 110016, China
| | - Bin Zhang
- Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, School of Materials Science and Engineering, Northeastern University, 3-11 Wenhua Road, Shenyang 110819, China
| | - Guang-Ping Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China.
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3
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Lu P, Liao X, Guo X, Cai C, Liu Y, Chi M, Du G, Wei Z, Meng X, Nie S. Gel-Based Triboelectric Nanogenerators for Flexible Sensing: Principles, Properties, and Applications. NANO-MICRO LETTERS 2024; 16:206. [PMID: 38819527 PMCID: PMC11143175 DOI: 10.1007/s40820-024-01432-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/30/2024] [Indexed: 06/01/2024]
Abstract
The rapid development of the Internet of Things and artificial intelligence technologies has increased the need for wearable, portable, and self-powered flexible sensing devices. Triboelectric nanogenerators (TENGs) based on gel materials (with excellent conductivity, mechanical tunability, environmental adaptability, and biocompatibility) are considered an advanced approach for developing a new generation of flexible sensors. This review comprehensively summarizes the recent advances in gel-based TENGs for flexible sensors, covering their principles, properties, and applications. Based on the development requirements for flexible sensors, the working mechanism of gel-based TENGs and the characteristic advantages of gels are introduced. Design strategies for the performance optimization of hydrogel-, organogel-, and aerogel-based TENGs are systematically summarized. In addition, the applications of gel-based TENGs in human motion sensing, tactile sensing, health monitoring, environmental monitoring, human-machine interaction, and other related fields are summarized. Finally, the challenges of gel-based TENGs for flexible sensing are discussed, and feasible strategies are proposed to guide future research.
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Affiliation(s)
- Peng Lu
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, People's Republic of China
| | - Xiaofang Liao
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Xiaoyao Guo
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Chenchen Cai
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Yanhua Liu
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Mingchao Chi
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Guoli Du
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Zhiting Wei
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Xiangjiang Meng
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Shuangxi Nie
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China.
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4
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Li J, Shi Y, Chen J, Huang Q, Ye M, Guo W. Flexible Self-Powered Low-Decibel Voice Recognition Mask. SENSORS (BASEL, SWITZERLAND) 2024; 24:3007. [PMID: 38793860 PMCID: PMC11124924 DOI: 10.3390/s24103007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/26/2024]
Abstract
In environments where silent communication is essential, such as libraries and conference rooms, the need for a discreet means of interaction is paramount. Here, we present a single-electrode, contact-separated triboelectric nanogenerator (CS-TENG) characterized by robust high-frequency sensing capabilities and long-term stability. Integrating this TENG onto the inner surface of a mask allows for the capture of conversational speech signals through airflow vibrations, generating a comprehensive dataset. Employing advanced signal processing techniques, including short-time Fourier transform (STFT), Mel-frequency cepstral coefficients (MFCC), and deep learning neural networks, facilitates the accurate identification of speaker content and verification of their identity. The accuracy rates for each category of vocabulary and identity recognition exceed 92% and 90%, respectively. This system represents a pivotal advancement in facilitating secure and efficient unobtrusive communication in quiet settings, with promising implications for smart home applications, virtual assistant technology, and potential deployment in security and confidentiality-sensitive contexts.
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Affiliation(s)
- Jianing Li
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
| | - Yating Shi
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
| | - Jianfeng Chen
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
| | - Qiaoling Huang
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
- Jiujiang Research Institute, Xiamen University, Jiujiang 332000, China
| | - Meidan Ye
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
| | - Wenxi Guo
- Department of Physics, College of Physical Science and Technology, Research Institution for Biomimetics and Soft Matter, Xiamen University, Xiamen 361005, China; (J.L.); (Y.S.); (J.C.); (Q.H.); (M.Y.)
- Jiujiang Research Institute, Xiamen University, Jiujiang 332000, China
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5
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Ou F, Xie T, Li X, Zhang Z, Ning C, Tuo L, Pan W, Wang C, Duan X, Liang Q, Gao W, Li Z, Zhao S. Liquid-free ionic conductive elastomers with high mechanical properties and ionic conductivity for multifunctional sensors and triboelectric nanogenerators. MATERIALS HORIZONS 2024; 11:2191-2205. [PMID: 38410914 DOI: 10.1039/d3mh02217j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Liquid-free ionic conductive elastomers (ICEs) are ideal materials for constructing flexible electronic devices by avoiding the limitations of liquid components. However, developing all-solid-state ionic conductors with high mechanical strength, high ionic conductivity, excellent healing, and recyclability remains a great challenge. Herein, a series of liquid-free polyurethane-based ICEs with a double dynamic crosslinked structure are reported. As a result of interactions between multiple dynamic bonds (multi-level hydrogen bonds, disulfide bonds, and dynamic D-A bonds) and lithium-oxygen bonds, the optimal ICE exhibited a high mechanical strength (1.18 MPa), excellent ionic conductivity (0.14 mS cm-1), desirable healing capacity (healing efficiency >95%), and recyclability. A multi-functional wearable sensor based on the novel ICE enabled real-time and rapid detection of various human activities and enabled recognizing writing signals and encrypted information transmission. A triboelectric nanogenerator based on the novel ICE exhibited an excellent open-circuit voltage of 464 V, a short-circuit current of 16 μA, a transferred charge of 50 nC, and a power density of 720 mW m-2, enabling powering of small-scale electronic products. This study provides a feasible strategy for designing flexible sensor products and healing, self-powered devices, with promising prospects for application in soft ionic electronics.
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Affiliation(s)
- Fangyan Ou
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Ting Xie
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Xinze Li
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Zhichao Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Chuang Ning
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Liang Tuo
- Center on Nanoenergy Research, Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration, School of Physical Science & Technology, Guangxi University, Nanning 530004, China
| | - Wenyu Pan
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Changsheng Wang
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Xueying Duan
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Qihua Liang
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
| | - Wei Gao
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
- Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi 530004, China
- Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Zequan Li
- School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China.
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes, Nanning, Guangxi 530004, China
- Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi 530004, China
- Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning, Guangxi 530004, China
| | - Shuangliang Zhao
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning 530004, China
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi 530004, China
- Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, Guangxi 530004, China
- Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning, Guangxi 530004, China
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Yang Z, Wang Y, Lan L, Wang Y, Zhang X. Bioinspired H-Bonding Connected Gradient Nanostructure Actuators Based on Cellulose Nanofibrils and Graphene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401580. [PMID: 38708893 DOI: 10.1002/smll.202401580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/15/2024] [Indexed: 05/07/2024]
Abstract
The construction of flexible actuators with ultra-fast actuation and robust mechanical properties is crucial for soft robotics and smart devices, but still remains a challenge. Inspired by the unique mechanism of pinecones dispersing seeds in nature, a hygroscopic actuator with interlayer network-bonding connected gradient structure is fabricated. Unlike most conventional bilayer actuator designs, the strategy leverages biobased polyphenols to construct strong interfacial H-bonding networks between 1D cellulose nanofibers and 2D graphene oxide, endowing the materials with high tensile strength (172 MPa) and excellent toughness (6.64 MJ m-3). Furthermore, the significant difference in hydrophilicity between GO and rGO, along with the dense interlayer H-bonding, enables ultra-fast water exchange during water absorption and desorption processes. The resulted actuator exhibits ultra-fast driving speed (154° s-1), excellent pressure-resistant and cyclic stability. Taking advantages of these benefits, the actuator can be fabricated into smart devices (such as smart grippers, humidity control switches) with significant potential for practical applications. The presented approach to constructing interlayer H-bonding in gradient structures is instructive for achieving high performance and functionalization of biomass nanomaterials and the complex of 1D/2D nanomaterials.
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Affiliation(s)
- Zhangqin Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Yuting Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Lidan Lan
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
| | - Yuyan Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Xinxing Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, China
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7
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Dai J, Liu D, Yin X, Wen X, Cai G, Zheng L. Anisotropic Elastomer Ionomer Composite-Based Strain Sensors: Achieving High Sensitivity and Wide Detection for Human Motion Detection and Wireless Transmission. ACS Sens 2024; 9:2156-2165. [PMID: 38629405 DOI: 10.1021/acssensors.4c00274] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2024]
Abstract
Anisotropic strain sensors capable of multidirectional sensing are crucial for advanced sensor applications in human motion detection. However, current anisotropic sensors encounter challenges in achieving a balance among high sensitivity, substantial stretchability, and a wide linear detection range. To address these challenges, a facile freeze-casting strategy was employed to construct oriented filler networks composed of carbon nanotubes and conductive carbon black within a brominated butyl rubber ionomer (iBIIR) matrix. The resulting anisotropic sensor based on the iBIIR composites exhibited distinct gauge factors (GF) in the parallel and vertical directions (GF∥ = 4.91, while GF⊥ = 2.24) and a broad linear detection range over a strain range of 190%. This feature enables the sensor to detect various human activities, including uniaxial pulse, finder bending, elbow bending, and cervical spine movements. Moreover, the ion-cross-linking network within the iBIIR, coupled with strong π-cation interactions between the fillers and iBIIR macromolecules, imparted high strength (12.3 MPa, nearly twice that of pure iBIIR) and an ultrahigh elongation at break (>1800%) to the composites. Furthermore, the sensor exhibited exceptional antibacterial effectiveness, surpassing 99% against both Escherichia coli and Staphylococcus aureus. Notably, the sensor was capable of wireless sensing. It is anticipated that anisotropic sensors will have extensive application prospects in flexible wearable devices.
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Affiliation(s)
- Jiawen Dai
- College of Materials Science and Engineering, Hubei Key Laboratory for New Textile Materials and Applications, Wuhan Textile University, Wuhan 430200, China
| | - Dong Liu
- College of Materials Science and Engineering, Hubei Key Laboratory for New Textile Materials and Applications, Wuhan Textile University, Wuhan 430200, China
| | - Xianze Yin
- College of Materials Science and Engineering, Hubei Key Laboratory for New Textile Materials and Applications, Wuhan Textile University, Wuhan 430200, China
| | - Xianjie Wen
- Department of Anesthesiology, Second People's Hospital of Foshan & Foshan Perioperative Medical Engineering Technology Research Center, Foshan 528000, China
| | - Guangming Cai
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, China
| | - Long Zheng
- College of Materials Science and Engineering, Hubei Key Laboratory for New Textile Materials and Applications, Wuhan Textile University, Wuhan 430200, China
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8
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Zhu WB, Wang YY, Fan T, Zhu Y, Tang ZH, Huang P, Li YQ, Fu SY. Comprehensive Investigation of the Temperature-Dependent Electromechanical Behaviors of Carbon Nanotube/Polymer Composites. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:8170-8179. [PMID: 38581390 DOI: 10.1021/acs.langmuir.4c00231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/08/2024]
Abstract
The performances of flexible piezoresistive sensors based on polymer nanocomposites are significantly affected by the environmental temperature; therefore, comprehensively investigating the temperature-dependent electromechanical response behaviors of conductive polymer nanocomposites is crucial for developing high-precision flexible piezoresistive sensors in a wide-temperature range. Herein, carbon nanotube (CNT)/polydimethylsiloxane (PDMS) composites widely used for flexible piezoresistive sensors were prepared, and then the temperature-dependent electrical, mechanical, and electromechanical properties of the optimized CNT/PDMS composite in the temperature range from -150 to 150 °C were systematically investigated. At a low temperature of -150 °C, the CNT/PDMS composite becomes brittle with a compressive modulus of ∼1.2 MPa and loses its elasticity and reversible sensing capability. At a high temperature (above 90 °C), the CNT/PDMS composite softens, shows a fluid-like mechanical property, and loses its reversible sensing capability. In the temperature range from -60 to 90 °C, the CNT/PDMS composite exhibits good elasticity and reversible sensing behaviors and its modulus, resistivity, and sensing sensitivity decrease with an increasing temperature. At room temperature (30 °C), the CNT/PDMS composite exhibits better mechanical and piezoresistive stability than those at low and high temperatures. Given that environmental temperature changes have significant effects on the sensing performances of conductive polymer composites, the effect of ambient temperature changes must be considered when flexible piezoresistive sensors are designed and fabricated.
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Affiliation(s)
- Wei-Bin Zhu
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - You-Yong Wang
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
- School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan, Hubei 442002, People's Republic of China
| | - Ting Fan
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
- School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, People's Republic of China
| | - Yu Zhu
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - Zhen-Hua Tang
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - Pei Huang
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - Yuan-Qing Li
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
| | - Shao-Yun Fu
- College of Aerospace Engineering, Chongqing University, Chongqing 400044, People's Republic of China
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9
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Fang L, Chen C, Zhang H, Tu X, Wang Z, He W, Shen S, Wu M, Wang P, Zheng L, Wang ZL. Polynary energy harvesting and multi-parameter sensing in the heatwave environment of industrial factory buildings by an integrated triboelectric-thermoelectric hybrid generator. MATERIALS HORIZONS 2024; 11:1414-1425. [PMID: 38363093 DOI: 10.1039/d3mh02228e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Taking advantage of a hybrid generator to simultaneously collect polynary energy from a single energy source provides a feasible solution for the energy dilemma in the new era. Herein, we integrate a triboelectric nanogenerator and a thermoelectric generator for polynary energy harvesting and self-powered sensing of heatwaves in large-scale industrial factory buildings, which contains both thermal energy and wind energy. The new design of the fan-shaped rotation triboelectric nanogenerator (FR-TENG) makes it more compact and easily integrated. After structure modeling, the energy conversion efficiency of the FR-TENG can reach a maximum of 37.2%, which can successfully power a Bluetooth hygrothermograph transmitting environmental information wirelessly every 30 s at a wind speed of 4.67 m s-1. An all-inorganic flexible thermoelectric generator (iThEG) is developed based on copper and constantan with an output power density of 0.73 W m-3, and maintains its original mechanical properties after 10 000 bending tests. Moreover, a self-powered hot wind sensing system based on Labview is established which can display wind-speed and wind-temperature in real time. The working concept presented here is also applicable to other single energy sources containing multiple energy forms, such as falling raindrops and sunlight, which can lift energy utilization and conversion efficiency and alleviate the energy crisis.
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Affiliation(s)
- Lin Fang
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Chen Chen
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Haonan Zhang
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Xinbo Tu
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Zixun Wang
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Wen He
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Shengnan Shen
- Hubei Key Laboratory of Electric Manufacturing and Packaging Integration (Wuhan University), Wuhan University, Wuhan, Hubei 430072, China
| | - Mingzai Wu
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Peihong Wang
- School of Materials Science and Engineering, Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion, Anhui University, Hefei, Anhui 230601, China.
| | - Li Zheng
- College of Mathematics and Physics, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Yonsei Frontier Lab, Yonsei University, Seoul 03722, Republic of Korea
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10
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Gui C, Li J, Zhang Z, Chen Z, Huang J, Li H. Fabrication of Electrode Material for Textile-Based Triboelectric Nanogenerators: Research of the Relationship between Output Performance and Dielectric Material Strain. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4022-4032. [PMID: 38349698 DOI: 10.1021/acs.langmuir.3c02375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
In this work, a textile-based triboelectric nanogenerator (TENG) device was developed through electroless plating technology to prepare electrode material. Hydrophilic groups on the fiber surface are able to absorb Ag+, which could play a role in the center of a catalyst to reduce Cu2+ to fabricate Cu-coated cotton toward the fabrication of TENG electrode material. The TENG device established admirable performance and good stabilization, and a maximum voltage at 9.6 V was detected when the stress and strain on the polydimethylsiloxane layer are 82.6 kPa and 5.8%, respectively. In addition, the relationships among device properties and strain/thickness of dielectric materials have been explored in depth as well. The output voltage of the device increases gradually with the enhancement of dielectric strain and stress. As expected, the TENG as-fabricated device was installed to various physical behaviors to illustrate the harvesting of power of knee-jerk movements.
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Affiliation(s)
- Chengmei Gui
- College of Chemical and Material Engineering, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- Anhui Engineering Research Center for High Efficiency Intelligent Photovoltaic Module, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou, Guangxi 542899, People's Republic of China
| | - Jing Li
- College of Chemical and Material Engineering, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- Anhui Engineering Research Center for High Efficiency Intelligent Photovoltaic Module, Chaohu University, Hefei, Anhui 230009, People's Republic of China
| | - Zifeng Zhang
- College of Chemical and Material Engineering, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- Anhui Engineering Research Center for High Efficiency Intelligent Photovoltaic Module, Chaohu University, Hefei, Anhui 230009, People's Republic of China
| | - Zhenming Chen
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, Anhui 230601, People's Republic of China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou, Guangxi 542899, People's Republic of China
| | - Junjun Huang
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, Anhui 230601, People's Republic of China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou, Guangxi 542899, People's Republic of China
| | - Honglin Li
- College of Chemical and Material Engineering, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, Anhui 230601, People's Republic of China
- Anhui Engineering Research Center for High Efficiency Intelligent Photovoltaic Module, Chaohu University, Hefei, Anhui 230009, People's Republic of China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou, Guangxi 542899, People's Republic of China
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11
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Das P, Marvi PK, Ganguly S, Tang XS, Wang B, Srinivasan S, Rajabzadeh AR, Rosenkranz A. MXene-Based Elastomer Mimetic Stretchable Sensors: Design, Properties, and Applications. NANO-MICRO LETTERS 2024; 16:135. [PMID: 38411801 PMCID: PMC10899156 DOI: 10.1007/s40820-024-01349-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 01/09/2024] [Indexed: 02/28/2024]
Abstract
Flexible sensors based on MXene-polymer composites are highly prospective for next-generation wearable electronics used in human-machine interfaces. One of the motivating factors behind the progress of flexible sensors is the steady arrival of new conductive materials. MXenes, a new family of 2D nanomaterials, have been drawing attention since the last decade due to their high electronic conductivity, processability, mechanical robustness and chemical tunability. In this review, we encompass the fabrication of MXene-based polymeric nanocomposites, their structure-property relationship, and applications in the flexible sensor domain. Moreover, our discussion is not only limited to sensor design, their mechanism, and various modes of sensing platform, but also their future perspective and market throughout the world. With our article, we intend to fortify the bond between flexible matrices and MXenes thus promoting the swift advancement of flexible MXene-sensors for wearable technologies.
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Affiliation(s)
- Poushali Das
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L8, Canada
| | - Parham Khoshbakht Marvi
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L8, Canada
| | - Sayan Ganguly
- Department of Chemistry and Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave West, Waterloo, ON, Canada
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Shatin, Hong Kong, People's Republic of China
| | - Xiaowu Shirley Tang
- Department of Chemistry and Waterloo Institute for Nanotechnology (WIN), University of Waterloo, 200 University Ave West, Waterloo, ON, Canada
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Shatin, Hong Kong, People's Republic of China
| | - Bo Wang
- Chair of Functional Materials, Department of Materials Science and Engineering, Saarland University, Saarbrücken, Germany
| | - Seshasai Srinivasan
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L8, Canada.
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada.
| | - Amin Reza Rajabzadeh
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L8, Canada.
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada.
| | - Andreas Rosenkranz
- Department for Chemical Engineering, Biotechnology and Materials, University of Chile, Santiago, Chile.
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12
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Jin J, Hu P, Song H, Li J, Wu J, Zeng Z, Li Q, Wang L, Lin X, Tan X. Highly sensitive and repeatable recording photopolymer for holographic data storage containing N-methylpyrrolidone. MATERIALS HORIZONS 2024; 11:930-938. [PMID: 38093700 DOI: 10.1039/d3mh01729j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The low photosensitivity of phenanthraquinone-doped poly(methyl methacrylate) (PQ/PMMA) severely limits its recording speed for holographic data storage. A high-performance holographic recording medium based on a unique combination of N-methylpyrrolidone (NMP) regulated PQ/PMMA has been developed. A NMP-PQ/PMMA photopolymer with high sensitivity, high diffraction efficiency and negligible volume shrinkage was successfully fabricated by tuning the composition of the PMMA matrix by varying the ratio of NMP to monomers. The photosensitivity is increased by 6.9 times (from 0.27 cm J-1 to 1.86 cm J-1), the diffraction efficiency is increased from 60% to > 80%, and volume shrinkage is decreased by a factor of 2 (from 0.4% to 0.2%). Further investigation revealed that the addition of NMP significantly reduced the molecular weight of PMMA and increased the amount of MMA residuals, while also improving the solubility of PQ molecules. More interestingly, for the first time, the NMP-PQ/PMMA material could record data information repeatedly at least 6 times. The present study elucidates that the introduction of NMP not only modulates the molecular weight of PMMA but also enables the residual monomer MMA to more easily combine with PQ to form a photoproduct for improved holographic performance.
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Affiliation(s)
- Junchao Jin
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Po Hu
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
- Henan Provincial Key Laboratory of Intelligent Lighting, Huanghuai University, Zhumadian 463000, China
| | - Haiyang Song
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Jinhong Li
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Junhui Wu
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Zeyi Zeng
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Qingdong Li
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Li Wang
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Xiao Lin
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
| | - Xiaodi Tan
- College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350117, China.
- Information Photonics Research Center, Key Laboratory of Opto-Electronic Science and for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, Fujian Normal University, Fuzhou 350117, China.
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13
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Li R, Wei D, Wang Z. Synergizing Machine Learning Algorithm with Triboelectric Nanogenerators for Advanced Self-Powered Sensing Systems. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:165. [PMID: 38251130 PMCID: PMC10819602 DOI: 10.3390/nano14020165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/25/2023] [Accepted: 01/07/2024] [Indexed: 01/23/2024]
Abstract
The advancement of the Internet of Things (IoT) has increased the demand for large-scale intelligent sensing systems. The periodic replacement of power sources for ubiquitous sensing systems leads to significant resource waste and environmental pollution. Human staffing costs associated with replacement also increase the economic burden. The triboelectric nanogenerators (TENGs) provide both an energy harvesting scheme and the possibility of self-powered sensing. Based on contact electrification from different materials, TENGs provide a rich material selection to collect complex and diverse data. As the data collected by TENGs become increasingly numerous and complex, different approaches to machine learning (ML) and deep learning (DL) algorithms have been proposed to efficiently process output signals. In this paper, the latest advances in ML algorithms assisting solid-solid TENG and liquid-solid TENG sensors are reviewed based on the sample size and complexity of the data. The pros and cons of various algorithms are analyzed and application scenarios of various TENG sensing systems are presented. The prospects of synergizing hardware (TENG sensors) with software (ML algorithms) in a complex environment and their main challenges for future developments are discussed.
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Affiliation(s)
- Roujuan Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China;
- School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Di Wei
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China;
| | - Zhonglin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China;
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA
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14
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Cao X, Cao Q, Zhang T, Ji W, Muhammad U, Chen J, Wei Y. Hydrophobically Associated Hydrogel for High Sensitivity and Resolution of an Interdigital Electrode Pressure Sensor. Biomacromolecules 2024; 25:143-154. [PMID: 38054613 DOI: 10.1021/acs.biomac.3c00884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Hydrogel-based flexible strain sensors have been known for their excellent ability to convert different motions of humans into electrical signals, thus enabling real-time monitoring of various human health parameters. In this work, a composite hydrogel with hydrophobic association and hybrid cross-linking was fabricated by using polyacrylamide (PAm), surfactant sodium dodecyl sulfate (SDS), lauryl methacrylate (LMA), and polypyrrole (PPy). The dynamic dissociation-conjugation among LMA, SDS, and PPy could dissipate energy to improve the toughness of hydrogels. The SDS/PPy/LMPAm composite hydrogel with a toughness of 1.44 MJ/m3, tensile fracture stress of 345 kPa, tensile strain of 1021%, and electrical conductivity of 0.57 S/m was obtained. Furthermore, an interdigital electrode flexible pressure sensor was designed to replace the bipolar electrode flexible pressure sensor, which greatly improved the sensitivity and resolution of the pressure sensor. The SDS/PPy/LMPAm composite hydrogel-based interdigital electrode flexible pressure sensor showed extraordinary stability and identified different hand gestures as well as monitored the pulse signal of humans. Moreover, the characteristic systolic and diastolic peaks were clearly observed. The pulse frequency (65 times/min) and the radial artery augmentation index (0.57) were calculated, which are very important in evaluating the arterial vessel wall and function of human arteries.
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Affiliation(s)
- Xuan Cao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing 100029, P. R. China
| | - Qinglong Cao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing 100029, P. R. China
| | - Taoyi Zhang
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Wenxi Ji
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Usman Muhammad
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing 100029, P. R. China
| | - Jing Chen
- Sinopec Beijing Research Institute of Chemical Industry, 14 North Third Ring Road East, Chaoyang District, Beijing 100014, China
| | - Yun Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 North Third Ring Road East, Chaoyang District, Beijing 100029, P. R. China
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15
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Zhang Z, Luo Y, Li Y, Ding S, Liu K, Luo B. Flexible Hybrid Wearable Sensors for Pressure and Thermal Sensing Based on a Double-Network Hydrogel. ACS APPLIED BIO MATERIALS 2023; 6:5114-5123. [PMID: 37941091 DOI: 10.1021/acsabm.3c00867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Flexible sensors have attracted great attention due to their wide applications in various fields such as motion monitoring and medical health. It is reasonable to develop a sensor with good flexibility, sensitivity, and biocompatibility for wearable device applications. In this study, a double-network hydrogel was obtained by blending poly(vinyl alcohol) (PVA) with poly(ethylene glycol) diacrylate (PEGDA), which combines the flexibility of the PVA network and the fast photocuring ability of PEGDA. Subsequently, polydopamine-coated carbon nanotubes were used as conductive fillers of the PVA-PEG hydrogel matrix to prepare a flexible sensor that exhibits an effective mechanical response and significant stability in mechanics and conductivity. More importantly, the resistance of the sensor is very sensitive to pressure and thermal changes due to the optimized conductive network in the hydrogel. A motion monitoring test showed that the flexible sensor not only responds quickly to the motion of different joints but also keeps the output signal stable after many cycles. In addition, the excellent cell affinity of the hybrid hydrogel also encourages its application in health monitoring and motion sensors.
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Affiliation(s)
- Zhaoyu Zhang
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
| | - Yiting Luo
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
| | - Yizhi Li
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
| | - Shan Ding
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
| | - Kun Liu
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
| | - Binghong Luo
- Biomaterial Research Laboratory, Department of Material Science and Engineering, College of Chemistry and Materials, Jinan University, Guangzhou 510632, PR China
- Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Guangzhou 510632, PR China
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16
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Zhao Z, Quan Z, Tang H, Xu Q, Zhao H, Wang Z, Song Z, Li S, Dharmasena I, Wu C, Ding W. A Broad Range Triboelectric Stiffness Sensor for Variable Inclusions Recognition. NANO-MICRO LETTERS 2023; 15:233. [PMID: 37861802 PMCID: PMC10589179 DOI: 10.1007/s40820-023-01201-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 08/28/2023] [Indexed: 10/21/2023]
Abstract
With the development of artificial intelligence, stiffness sensors are extensively utilized in various fields, and their integration with robots for automated palpation has gained significant attention. This study presents a broad range self-powered stiffness sensor based on the triboelectric nanogenerator (Stiff-TENG) for variable inclusions in soft objects detection. The Stiff-TENG employs a stacked structure comprising an indium tin oxide film, an elastic sponge, a fluorinated ethylene propylene film with a conductive ink electrode, and two acrylic pieces with a shielding layer. Through the decoupling method, the Stiff-TENG achieves stiffness detection of objects within 1.0 s. The output performance and characteristics of the TENG for different stiffness objects under 4 mm displacement are analyzed. The Stiff-TENG is successfully used to detect the heterogeneous stiffness structures, enabling effective recognition of variable inclusions in soft object, reaching a recognition accuracy of 99.7%. Furthermore, its adaptability makes it well-suited for the detection of pathological conditions within the human body, as pathological tissues often exhibit changes in the stiffness of internal organs. This research highlights the innovative applications of TENG and thereby showcases its immense potential in healthcare applications such as palpation which assesses pathological conditions based on organ stiffness.
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Affiliation(s)
- Ziyi Zhao
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Zhentan Quan
- Institute of Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Huaze Tang
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Qinghao Xu
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Hongfa Zhao
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Zihan Wang
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Ziwu Song
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Shoujie Li
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China
| | - Ishara Dharmasena
- Wolfson School of Mechanical Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | - Changsheng Wu
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Wenbo Ding
- Tsinghua-Berkeley Shenzhen Institute, Institute of Data and Information, Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, People's Republic of China.
- RISC-V International Open Source Laboratory, 518055, Shenzhen, People's Republic of China.
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17
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Niu Q, Yu J, Wang X, Yan X. Flexible multicolor biaxial sensor for strain direction identification based on sandwich-structured mechanoluminescent materials. OPTICS EXPRESS 2023; 31:34589-34599. [PMID: 37859211 DOI: 10.1364/oe.501457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 09/18/2023] [Indexed: 10/21/2023]
Abstract
Strain sensors capable of recognizing the direction of strain are crucial in applications such as robot attitude adjustment and detection of strain states in complex structures. In this study, a sandwich-structured flexible biaxial strain sensor was developed using polydimethylsiloxane as the substrate, mechanoluminescent materials as the luminescent elements, and rubber-ink as the light-blocking layer. By correlating the emitted light color with the stretching state, precise identification of the applied strain direction is achieved. Additionally, the mechanoluminescence of the sensor is collected by a photodiode, generating photocurrent that can be analyzed. This provides a solution for practical applications of sensor.
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