1
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Han X, Li M, He Z, Cao J, Xie G. Topological Rearrangement-Induced Mesoscale Phase Redistribution to Enhance the Fatigue Resistance of Polymer Blends. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 39140627 DOI: 10.1021/acsami.4c08682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Maintaining a high modulus to simultaneously withstand deformation and increase fatigue resistance to restrict crack propagation in a material presents a significant challenge. In this work, a straightforward strategy was developed to address this issue in polymers. A dynamic network was incorporated into a permanent one prior to the formation of the latter, and two incompatible polymer networks were created to prevent common phase separation. The mechanical and fatigue resistance properties were substantially enhanced by the exact modulation of the soft and hard phase distribution by precise control over the densities of dynamic and permanent networks as well as the number of reprocessing steps. The experimental results demonstrated a nearly 9-fold increase in the fatigue life of polyurethane compared with traditional design methods and a 2.5 times increase in modulus. This strategy shows potential for the design of fatigue-resistant thermosetting and thermoplastic materials. The results offer new insight into the development of durable, high-performance materials that are reprocessable and compatible.
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Affiliation(s)
- Xin Han
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Mengyu Li
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Zihuan He
- Superlubricity Engineering Research Center, Jihua Laboratory, Foshan 528000, China
| | - Jingchao Cao
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
| | - Guoxin Xie
- State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China
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2
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Zhou L, Zhao B, Liang J, Lu F, Yang W, Xu J, Zheng J, Liu Y, Wang R, Liu Z. Low hysteresis, water retention, anti-freeze multifunctional hydrogel strain sensor for human-machine interfacing and real-time sign language translation. MATERIALS HORIZONS 2024; 11:3856-3866. [PMID: 38776065 DOI: 10.1039/d4mh00126e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Hydrogel strain sensors have received increasing attention due to their potential applications in human-machine interfaces and flexible electronics. However, they usually suffer from both mechanical and electrical hysteresis and poor water retention, which limit their practical applications. To address this challenge, a poly(acrylic acid-co-acrylamide) hydrogel crosslinked by silica nanoparticles is fabricated via photo polymerization and salting-out of hydrophilic ions for the strain sensor. The resulting hydrogel strain sensor possessed low electrical hysteresis (1.6%), low mechanical hysteresis (<7%), high cycle stability (>10 000 cycles), high durability, water retention and anti-freezing ability. Moreover, this strain sensor can be used as a wearable sensor for real-time control of robotic hands and hand gesture recognition. Finally, a sign language translation system has been demonstrated with the aid of machine learning, achieving recognition rates of over 98% for 15 different sign languages. This work offers a promising prospect for human-machine interfaces, smart wearable devices, and the Internet of Things.
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Affiliation(s)
- Lijuan Zhou
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Bin Zhao
- School of Artificial Intelligence, Guangxi Colleges and Universities Key Laboratory of AI Algorithm Engineering, Guilin University of Electronic Technology, Guilin Guangxi, 541004, China
| | - Jingye Liang
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Fangying Lu
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Weiping Yang
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Jishuai Xu
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Jingxuan Zheng
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Yong Liu
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Run Wang
- School of Textile Science and Engineering, Tiangong University, 399 West Binshui Road, Tianjin 300387, China.
| | - Zunfeng Liu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, College of Chemistry Frontiers Science Center for New Organic Matter, Nankai University, 94 Weijin Road, Tianjin 300071, China
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3
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Zheng X, Zhou D, Liu Z, Hong X, Li C, Ge S, Cao W. Skin-Inspired Textile Electronics Enable Ultrasensitive Pressure Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310032. [PMID: 38566533 DOI: 10.1002/smll.202310032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 03/16/2024] [Indexed: 04/04/2024]
Abstract
Wearable pressure sensors have attracted great interest due to their potential applications in healthcare monitoring and human-machine interaction. However, it is still a critical challenge to simultaneously achieve high sensitivity, low detection limit, fast response, and outstanding breathability for wearable electronics due to the difficulty in constructing microstructure on a porous substrate. Inspired by the spinosum microstructure of human skin for highly-sensitive tactile perception, a biomimetic flexible pressure sensor is designed and fabricated by assembling MXene-based sensing electrode and MXene-based interdigitated electrode. The product biomimetic sensor exhibits good flexibility and suitable air permeability (165.6 mm s-1), comparable to the typical air permeable garments. Benefiting from the two-stage amplification effect of the bionic intermittent structure, the product bionic sensor exhibits an ultrahigh sensitivity (1368.9 kPa-1), ultrafast response (20 ms), low detection limit (1 Pa), and high-linearity response (R2 = 0.997) across the entire sensing range. Moreover, the pressure sensor can detect a wide range of human motion in real-time through intimate skin contact, providing essential data for biomedical monitoring and personal medical diagnosis. This principle lays a foundation for the development of human skin-like high-sensitivity, fast-response tactile sensors.
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Affiliation(s)
- Xianhong Zheng
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, China
| | - Dashuang Zhou
- School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, China
| | - Zhi Liu
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, China
| | - Xinghua Hong
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang Province, 310018, China
| | - Changlong Li
- School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui, 241000, China
| | - Shanhai Ge
- Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Wentao Cao
- Department of Prosthodontics, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, 201102, China
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4
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Shi W, Li H, Chen J, Ching YC, Chuah CH, Xu C, Liu M, Zhang J, Ching KY, Liang Y, Li G, Tang W. Stretchable, Self-Healing, and Bioactive Hydrogel with High-Functionality N,N-bis(acryloyl)cystamine Dynamically Bonded Ag@polydopamine Crosslinkers for Wearable Sensors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404451. [PMID: 39031305 DOI: 10.1002/advs.202404451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 06/27/2024] [Indexed: 07/22/2024]
Abstract
Hydrogels present attractive opportunities as flexible sensors due to their soft nature and tunable physicochemical properties. Despite significant advances, practical application of hydrogel-based sensor is limited by the lack of general routes to fabricate materials with combination of mechanical, conductive, and biological properties. Here, a multi-functional hydrogel sensor is reported by in situ polymerizing of acrylamide (AM) with N,N'-bis(acryloyl)cystamine (BA) dynamic crosslinked silver-modified polydopamine (PDA) nanoparticles, namely PAM/BA-Ag@PDA. Compared with traditional polyacrylamide (PAM) hydrogel, the BA-Ag@PDA nanoparticles provide both high-functionality crosslinks and multiple interactions within PAM networks, thereby endowing the optimized PAM/BA-Ag@PDA hydrogel with significantly enhanced tensile/compressive strength (349.80 kPa at 383.57% tensile strain, 263.08 kPa at 90% compressive strain), lower hysteresis (5.2%), improved conductivity (2.51 S m-1) and excellent near-infrared (NIR) light-triggered self-healing ability. As a strain sensor, the PAM/BA-Ag@PDA hydrogel shows a good sensitivity (gauge factor of 1.86), rapid response time (138 ms), and high stability. Owing to abundant reactive groups in PDA, the PAM/BA-Ag@PDA hydrogel exhibits inherent tissue adhesiveness and antioxidant, along with a synergistic antibacterial effect by PDA and Ag. Toward practical applications, the PAM/BA-Ag@PDA hydrogel can conformally adhere to skin and monitor subtle activities and large-scale movements with excellent reliability, demonstrating its promising applications as wearable sensors for healthcare.
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Affiliation(s)
- Wei Shi
- Department of Chemical Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Hui Li
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Jing Chen
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Yern Chee Ching
- Department of Chemical Engineering, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
| | - Cheng Hock Chuah
- Department of Chemistry, University of Malaya, Lembah Pantai, Kuala Lumpur, 50603, Malaysia
| | - Chengsheng Xu
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Moran Liu
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Jinyong Zhang
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Kuan Yong Ching
- Foundation, Study and Language Institute, University of Reading-Malaysia Campus, Persiaran Graduan, Kota Ilmu EduCity, Iskandar Puteri, Johor, 79200, Malaysia
| | - Yongsheng Liang
- College of Big Data and Internet, Shenzhen Technology University, 3002 Lantian Road, Shenzhen, Guangdong, 518118, China
| | - Guanglin Li
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
| | - Wei Tang
- Key Laboratory of Human-Machine-Intelligence Synergic System, Research Center for Neural Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 1068 Xueyuan Road, Shenzhen, Guangdong, 518055, China
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5
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Geißler D, Zhou B, Bello H, Sorysz J, Ray L, Javaheri H, Rüb M, Herbst J, Zahn E, Woop E, Bian S, Schotten HD, Joost G, Lukowicz P. Embedding textile capacitive sensing into smart wearables as a versatile solution for human motion capturing. Sci Rep 2024; 14:15797. [PMID: 38982105 PMCID: PMC11233671 DOI: 10.1038/s41598-024-66165-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 06/27/2024] [Indexed: 07/11/2024] Open
Abstract
This work presents a novel and versatile approach to employ textile capacitive sensing as an effective solution for capturing human body movement through fashionable and everyday-life garments. Conductive textile patches are utilized for sensing the movement, working without the need for strain or direct body contact, wherefore the patches can sense only from their deformation within the garment. This principle allows the sensing area to be decoupled from the wearer's body for improved wearing comfort and more pleasant integration. We demonstrate our technology based on multiple prototypes which have been developed by an interdisciplinary team of electrical engineers, computer scientists, digital artists, and smart fashion designers through several iterations to seamlessly incorporate the technology of capacitive sensing with corresponding design considerations into textile materials. The resulting accumulation of textile capacitive sensing wearables showcases the versatile application possibilities of our technology from single-joint angle measurements towards multi-joint body part tracking.
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Affiliation(s)
- Daniel Geißler
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany.
| | - Bo Zhou
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Hymalai Bello
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Joanna Sorysz
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Lala Ray
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Hamraz Javaheri
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Matthias Rüb
- Intelligent Networks, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Jan Herbst
- Intelligent Networks, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Esther Zahn
- Design Research eXplorations, German Research Center for Artificial Intelligence (DFKI), Berlin, Germany
| | - Emil Woop
- Design Research eXplorations, German Research Center for Artificial Intelligence (DFKI), Berlin, Germany
| | - Sizhen Bian
- Information Technology and Electrical Engineering, ETH Zurich, Zurich, Switzerland
| | - Hans D Schotten
- Intelligent Networks, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
| | - Gesche Joost
- Design Research eXplorations, German Research Center for Artificial Intelligence (DFKI), Berlin, Germany
| | - Paul Lukowicz
- Embedded Intelligence, German Research Center for Artificial Intelligence (DFKI), Kaiserslautern, Germany
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6
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Guan R, Xu H, Lou Z, Zhao Z, Wang L. Design and Development of Metasurface Materials for Enhancing Photodetector Properties. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402530. [PMID: 38970208 DOI: 10.1002/advs.202402530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/20/2024] [Indexed: 07/08/2024]
Abstract
Recently, metasurface-based photodetectors (metaphotodetectors) have been developed and applied in various fields. Metasurfaces are artificial materials with unique properties that have emerged over the past decade, and photodetectors are powerful tools used to quantify incident electromagnetic wave information by measuring changes in the conductivity of irradiated materials. Through an efficient microstructural design, metasurfaces can effectively regulate numerous characteristics of electromagnetic waves and have demonstrated unique advantages in various fields, including holographic projection, stealth, biological image enhancement, biological sensing, and energy absorption applications. Photodetectors play a crucial role in military and civilian applications; therefore, efficient photodetectors are essential for optical communications, imaging technology, and spectral analysis. Metaphotodetectors have considerably improved sensitivity and noise-equivalent power and miniaturization over conventional photodetectors. This review summarizes the advantages of metaphotodetectors based on five aspects. Furthermore, the applications of metaphotodetectors in various fields including military and civil applications, are systematically discussed. It highlights the potential future applications and developmental trends of metasurfaces in metaphotodetectors, provides systematic guidance for their development, and establishes metasurfaces as a promising technology.
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Affiliation(s)
- Renquan Guan
- State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
| | - Hao Xu
- State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
| | - Zheng Lou
- State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhao Zhao
- Faculty of Physics, Northeast Normal University, Changchun, 130024, China
| | - Lili Wang
- State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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7
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Li W, Zhou T, Zhang Z, Li L, Lian W, Wang Y, Lu J, Yan J, Wang H, Wei L, Cheng Q. Ultrastrong MXene film induced by sequential bridging with liquid metal. Science 2024; 385:62-68. [PMID: 38963844 DOI: 10.1126/science.ado4257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 06/03/2024] [Indexed: 07/06/2024]
Abstract
Assembling titanium carbide (Ti3C2Tx) MXene nanosheets into macroscopic films presents challenges, including voids, low orientation degree, and weak interfacial interactions, which reduce mechanical performance. We demonstrate an ultrastrong macroscopic MXene film using liquid metal (LM) and bacterial cellulose (BC) to sequentially bridge MXene nanosheets (an LBM film), achieving a tensile strength of 908.4 megapascals. A layer-by-layer approach using repeated cycles of blade coating improves the orientation degree to 0.935 in the LBM film, while a LM with good deformability reduces voids into porosity of 5.4%. The interfacial interactions are enhanced by the hydrogen bonding from BC and the coordination bonding with LM, which improves the stress-transfer efficiency. Sequential bridging provides an avenue for assembling other two-dimensional nanosheets into high-performance materials.
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Affiliation(s)
- Wei Li
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Tianzhu Zhou
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
| | - Zejun Zhang
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Lei Li
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Wangwei Lian
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Yanlei Wang
- School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China
| | - Junfeng Lu
- School of Chemistry and Life Resources, Renmin University of China, Beijing 100872, China
| | - Jia Yan
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Huagao Wang
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
| | - Lei Wei
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
| | - Qunfeng Cheng
- School of Chemistry, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
- Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou 215123, China
- Institute of Energy Materials Science (IEMS), University of Shanghai for Science and Technology, Shanghai 200093, China
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8
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Ren Y, Zou B, Wu Y, Ye L, Liang Y, Li Y. Acryloyl chitosan as a macro-crosslinker for freezing-resistant, self-healing and self-adhesive ionogels-based multicompetent flexible sensors. Int J Biol Macromol 2024; 273:133002. [PMID: 38851613 DOI: 10.1016/j.ijbiomac.2024.133002] [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] [Received: 12/18/2023] [Revised: 03/23/2024] [Accepted: 06/05/2024] [Indexed: 06/10/2024]
Abstract
Here, a polysaccharide derivative acryloyl chitosan (AcCS) is exploited as macro-crosslinker to synthesize a novel ionogel poly (acrylic acid-co-1-Vinyl-3-butyl imidazolium chloride) (AA-IL/AcCS) via a one-pot method. AcCS provides abundant physical and chemical crosslinking sites contributing to the high mechanical stretchability (elongation at break 600 %) and strength (tensile strength 137 kPa) of AA-IL/AcCS. The high-density of dynamic bonds (hydrogen bonds and electrostatic interactions) in the network of ionogels enables self-healing and self-adhesive features of AA-IL/AcCS. Meanwhile, AA-IL/AcCS exhibits high ionic conductivity (0.1 mS/cm) at room temperature and excellent antifreeze ability (-58 °C). The AA-IL/AcCS-based sensor shows diverse sensory capabilities towards temperature and humidity, moreover, it could precisely detect human motions and handwritings signals. Furthermore, AA-IL/AcCS exhibits excellent bactericidal properties against both gram-positive and gram-negative bacteria. This work opens the possibility of polysaccharides as a macro-crosslinkers for preparing ionogel-based sensors for wearable electronics.
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Affiliation(s)
- Yuanyuan Ren
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China
| | - Binhu Zou
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China
| | - Yantong Wu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China
| | - Lijun Ye
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China
| | - Yuanyuan Liang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China.
| | - Yongjin Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, No. 2318, Yuhangtang Rd., 311121 Hangzhou, PR China.
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9
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Li Y, Zhang Z, Du S, Zong S, Ning Z, Yang F. Highly Sensitive Biomimetic Crack Pressure Sensor with Selective Frequency Response. ACS Sens 2024; 9:3057-3065. [PMID: 38808653 DOI: 10.1021/acssensors.4c00245] [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: 05/30/2024]
Abstract
High-sensitivity sensors in practical applications face the issue of environmental noise interference, requiring additional noise reduction circuits or filtering algorithms to improve the signal-to-noise ratio (SNR). To address this issue, this study proposes a biomimetic crack pressure sensor with selective frequency response based on hydrogel dampers. The core of this research is to construct a biomimetic crack pressure sensor with selective frequency response using the high-pass filtering characteristics of gelatin-chitosan hydrogels. This design, inspired by the slit sensilla and stratum corneum structure of spider legs, delves into the material properties and principles of hydrogel dampers, exploring their application in biomimetic crack pressure sensors, including parameter selection, structural design, and performance optimization. By delving into the nuanced characteristics and working principles of hydrogel dampers, their integration in biomimetic crack pressure sensors is examined, focusing on aspects like parameter selection, structural engineering, and performance enhancement to selectively sieve out low-frequency noise and transmit target vibrational signals. Experimental results demonstrate that this innovative sensor, while suppressing low-frequency vibration signals, can selectively detect high-frequency signals with high sensitivity. At different vibration frequencies, the relative change in resistance exceeds 200%, and the sensor sensitivity is 7 × 104 kPa-1. Furthermore, this sensor was applied to human voice detection, and the corresponding results verified its frequency-selective performance evidently. This study not only proposes a new design for pressure sensors but also offers fresh insights into the application of biomimetic crack pressure sensors in intricate environments.
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Affiliation(s)
- Yan Li
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
| | - Zongzheng Zhang
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
| | - Songlin Du
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
| | - Sicheng Zong
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
| | - Zijun Ning
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
| | - Fuling Yang
- School of Mechanical and Electrical Engineering, China University of Mining and Technology─Beijing, Beijing 100083, China
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10
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Zhu Y, Yao D, Gao X, Chen J, Wang H, You T, Lu C, Pang X. Recyclable Bimodal Polyvinyl Alcohol/PEDOT:PSS Hydrogel Sensors for Highly Sensitive Strain and Temperature Sensing. ACS APPLIED MATERIALS & INTERFACES 2024; 16:32466-32480. [PMID: 38864420 DOI: 10.1021/acsami.4c05878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Multimodal flexible sensors, consisting of multiple sensing units, can sense and recognize different external stimuli by outputting different types of response signals. However, the recovery and recycling of multimodal sensors are impeded by complex structures and the use of multiple materials. Here, a bimodal flexible sensor that can sense strain by resistance change and temperature by voltage change was constructed using poly(vinyl alcohol) hydrogel as a matrix and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) as a sensing material due to its conductivity and thermoelectric effect. The plasticity of hydrogels, along with the simplicity of the sensor's components and structure, facilitates easy recovery and recycling. The incorporation of citric acid and ethylene glycol improved the mechanical properties, strain hysteresis, and antifreezing properties of the hydrogels. The sensor exhibits a remarkable response to strain, characterized by high sensitivity (gauge factor of 4.46), low detection limit (0.1%), fast response and recovery times, minimal hysteresis, and excellent stability. Temperature changes induced by hot air currents, hot objects, and light cause the sensor to exhibit high response sensitivity, fast response time, and good stability. Additionally, variations in ambient humidity and temperature minimally affect the sensor's strain response, and temperature response remains unaffected by humidity changes. The recycled sensors are essentially unchanged for bimodal sensing of strain and temperature. Finally, bimodal sensors are applied to monitor body motion, and robots to sense external stimuli.
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Affiliation(s)
- Yan Zhu
- School of Chemistry & Chemical Engineering, Henan University of Science &Technology, Luoyang 471003, P. R. China
| | - Dahu Yao
- School of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471023, P. R. China
| | - Xiping Gao
- School of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471023, P. R. China
| | - Jing Chen
- School of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471023, P. R. China
| | - Hui Wang
- School of Chemistry & Chemical Engineering, Henan University of Science &Technology, Luoyang 471003, P. R. China
| | - Tianyan You
- College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang 471023, China
| | - Chang Lu
- School of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471023, P. R. China
| | - Xinchang Pang
- School of Materials Science and Engineering, Henan University of Science & Technology, Luoyang 471023, P. R. China
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11
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He P, Yue J, Qiu Z, Meng Z, He J, Li D. Consecutive multimaterial printing of biomimetic ionic hydrogel power sources with high flexibility and stretchability. Nat Commun 2024; 15:5261. [PMID: 38898001 PMCID: PMC11187209 DOI: 10.1038/s41467-024-49469-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 06/05/2024] [Indexed: 06/21/2024] Open
Abstract
Electric eel is an excellent example to harness ion-concentration gradients for sustainable power generation. However, current strategies to create electric-eel-inspired power sources commonly involve manual stacking of multiple salinity-gradient power source units, resulting in low efficiency, unstable contact, and poor flexibility. Here we propose a consecutive multimaterial printing strategy to efficiently fabricate biomimetic ionic hydrogel power sources with a maximum stretchability of 137%. The consecutively-printed ionic hydrogel power source filaments showed seamless bonding interface and can maintain stable voltage outputs for 1000 stretching cycles at 100% strain. With arrayed multi-channel printhead, power sources with a maximum voltage of 208 V can be automatically printed and assembled in parallel within 30 min. The as-printed flexible power source filaments can be woven into a wristband to power a digital wristwatch. The presented strategy provides a tool to efficiently produce electric-eel-inspired ionic hydrogel power sources with great stretchability for various flexible power source applications.
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Affiliation(s)
- Pei He
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Junyu Yue
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Zhennan Qiu
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
| | - Zijie Meng
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jiankang He
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.
| | - Dichen Li
- State Key Laboratory for Manufacturing System Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
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12
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Wan D, Xia X, Wang H, He S, Dong J, Dai J, Guan D, Zheng J, Yang X, Zi Y. A Compact-Sized Fully Self-Powered Wireless Flowmeter Based on Triboelectric Discharge. SMALL METHODS 2024:e2301670. [PMID: 38634248 DOI: 10.1002/smtd.202301670] [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: 01/29/2024] [Indexed: 04/19/2024]
Abstract
Flow sensing exhibits significant potential for monitoring, controlling, and optimizing processes in industries, resource management, and environmental protection. However, achieving wireless real-time and omnidirectional sensing of gas/liquid flow on a simple, self-contained device without external power support has remained a formidable challenge. In this study, a compact-sized, fully self-powered wireless sensing flowmeter (CSWF) is introduced with a small size diameter of down to less than 50 mm, which can transmit real-time and omnidirectional wireless signals, as driven by a rotating triboelectric nanogenerator (R-TENG). The R-TENG triggers the breakdown discharge of a gas discharge tube (GDT), which enables flow rate wireless sensing through emitted electromagnetic waves. Importantly, the performance of the CSWF is not affected by the R-TENG's varied output, while the transmission distance is greater than 10 m. Real-time wireless remote monitoring of wind speed and water flow rate is successfully demonstrated. This research introduces an approach to achieve a wireless, self-powered environmental monitoring system with a diverse range of potential applications, including prolonged meteorological observations, marine environment monitoring, early warning systems for natural disasters, and remote ecosystem monitoring.
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Affiliation(s)
- Dong Wan
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
| | - Xin Xia
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
| | - Haoyu Wang
- Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Shaoshuai He
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
| | - Jiadan Dong
- State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, 430079, China
| | - Jinhong Dai
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
| | - Dong Guan
- College of Mechanical Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, China
| | - Junyu Zheng
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
| | - Xiya Yang
- Institute of New Energy Technology, College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Yunlong Zi
- Thrust of Sustainable Energy and Environment, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou, Guangdong, 511400, China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen, Guangdong, 518048, China
- Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511400, China
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13
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Gao H, Cai W, Li A, Du Y, Zhu JL, Ye Z. Ultrasensitive Biomimetic Skin with Multimodal and Photoelectric Dual-Signal Sensing. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38593088 DOI: 10.1021/acsami.4c00741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Mimicking biological skin enabling direct, intelligent interaction between users and devices, multimodal sensing with optical/electrical (OE) output signals is urgently required. Owing to this, this work aims to logically design a stretchable OE biomimetic skin (OE skin), which can sensitively sense complex external stimuli of pressure, strain, temperature, and localization. The OE skin consists of elastic thin polymer-stabilized cholesteric liquid crystal films, an ion-conductive hydrogel layer, and an elastic protective membrane formed with thin polydimethylsiloxane. The as-designed OE skin exhibits customizable structural color on demand, good thermochromism, and excellent mechanochromism, with the ability to extend the full visible spectrum, a good linearity of over 0.99, fast response speed of 93 ms, and wide temperature range of 119 °C. In addition, the conduction resistance variation of ion-conductive hydrogel exhibits excellent sensing capabilities under pressure, stretch, and temperature, endowing a good linearity of 0.99998 (stretching from 0 to 150%) and high thermal sensitivity of 0.86% per °C. Such an outstanding OE skin provides design concepts for the development of multifunctional biomimetic skin used in human-machine interaction and can find wide applications in intelligent wearable devices and human-machine interactions.
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Affiliation(s)
- Han Gao
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China
| | - Wenshan Cai
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China
| | - Aotian Li
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China
| | - Yike Du
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China
| | - Ji-Liang Zhu
- Department of Applied Physics, Hebei University of Technology, Tianjin 300401, China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
| | - Zhicheng Ye
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
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14
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Wang F, Li H, Hu P, Wang Y, Guan F, Su X, Iqbal MI, Sun F. Industrially Scalable Textile Sensing Interfaces for Extended Artificial Tactile and Human Motion Monitoring without Compromising Comfort. ACS APPLIED MATERIALS & INTERFACES 2024; 16:16788-16799. [PMID: 38520339 DOI: 10.1021/acsami.4c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/25/2024]
Abstract
Smart wearables with the capability for continuous monitoring, perceiving, and understanding human tactile and motion signals, while ensuring comfort, are highly sought after for intelligent healthcare and smart life systems. However, concurrently achieving high-performance tactile sensing, long-lasting wearing comfort, and industrialized fabrication by a low-cost strategy remains a great challenge. This is primarily due to critical research gaps in novel textile structure design for seamless integration with sensing elements. Here, an all-in-one biaxial insertion knit architecture is reported to topologically integrate sensing units within double-knit loops for the fabrication of a large-scale tactile sensing textile by using low-cost industrial manufacturing routes. High sensitivity, stability, and low hysteresis of arrayed sensing units are achieved through engineering of fractal structures of hierarchically patterned piezoresistive yarns via blistering and twisting processing. The as-prepared tactile sensing textiles show desirable sensing performance and robust mechanical property, while ensuring excellent conformability, tailorability, breathability (288 mm s-1), and moisture permeability (3591 g m-2 per day) for minimizing the effect on wearing comfort. The multifunctional applications of tactile sensing textiles are demonstrated in continuously monitoring human motions, tactile interactions with the environment, and recognizing biometric gait. Moreover, we also demonstrate that machine learning-assisted sensing textiles can accurately predict body postures, which holds great promise in advancing the development of personalized healthcare robotics, prosthetics, and intelligent interaction devices.
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Affiliation(s)
- Fameng Wang
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Haoyun Li
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Pengpeng Hu
- Centre for Computer Science and Mathematical Modelling, Coventry University, Coventry CV1 5FB, U.K
| | - Yudong Wang
- College of Biological and Chemical Engineering, Guangxi University of Science & Technology, Liuzhou 545006, China
| | - Fuwang Guan
- College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China
| | - Xuzhong Su
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Mohammad Irfan Iqbal
- Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Fengxin Sun
- Key Laboratory of Eco-textiles of Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Soft FibrousMaterials, Jiangnan University, Wuxi 214122, China
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15
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Zhang Y, Li D, Li J, Li Y, Wang L, Xu H, Han W. Flexible TiVCTx MXene film for high-performance magnesium-ion storage device. J Colloid Interface Sci 2024; 657:550-558. [PMID: 38071804 DOI: 10.1016/j.jcis.2023.11.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/03/2023] [Accepted: 11/27/2023] [Indexed: 01/02/2024]
Abstract
Magnesium-based battery system has emerged as the potential candidate to beyond Li-ion battery system due to the numerous advantageous of magnesium anode, such as natural abundance, high capacity and dendrites free. However, the selection of cathode materials and the intercalation of magnesium-ions in the cathode host material remains a challenge due to the strong interaction of highly polar divalent magnesium ions with the cathode material, making the diffusion of magnesium ions relatively difficult. Herein, the flexible TiVCTx MXene film was developed via a facile and economical approach. As the cathode host material for magnesium-ion storage, the freestanding TiVCTx MXene film displays a high specific capacity of 111 and 135 mAh g-1 at a current density of 0.05 A g-1 for magnesium-ion batteries (MIB) and Mg/Li hybrid batteries (MLHB). Furthermore, a long-term cycling stability over 1000 cycles was demonstrated and a detailed investigation of the unique long activation phenomenon of MXene films during cycling. More importantly, the reaction mechanism of magnesium-ion storage was validated, i.e., the MXene interlayer spacing variation with the reversible Mg2+ diffusion behavior. This work reveals the magnesium storage mechanism of MXene materials and provides a new pathway for high-performance storage of magnesium-ion cathode materials.
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Affiliation(s)
- Yuming Zhang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China; Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology, College of Physics, Jilin University, Changchun 130012, China
| | - Dongdong Li
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China; Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology, College of Physics, Jilin University, Changchun 130012, China
| | - Junzhi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Yilin Li
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China; Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology, College of Physics, Jilin University, Changchun 130012, China
| | - Lili Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China
| | - Hao Xu
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences & Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing 100083, China.
| | - Wei Han
- Sino-Russian International Joint Laboratory for Clean Energy and Energy Conversion Technology, College of Physics, Jilin University, Changchun 130012, China.
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16
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Lu C, Meng J, Yu J, Song J, Wang T, Zhu H, Sun QQ, Zhang DW, Chen L. Novel Three-Dimensional Artificial Neural Network Based on an Eight-Layer Vertical Memristor with an Ultrahigh Rectify Ratio (>10 7) and an Ultrahigh Nonlinearity (>10 5) for Neuromorphic Computing. NANO LETTERS 2024; 24:2018-2024. [PMID: 38315050 DOI: 10.1021/acs.nanolett.3c04577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
In recent years, memristors have successfully demonstrated their significant potential in artificial neural networks (ANNs) and neuromorphic computing. Nonetheless, ANNs constructed by crossbar arrays suffer from cross-talk issues and low integration densities. Here, we propose an eight-layer three-dimensional (3D) vertical crossbar memristor with an ultrahigh rectify ratio (RR > 107) and an ultrahigh nonlinearity (>105) to overcome these limitations, which enables it to reach a >1 Tb array size without reading failure. Furthermore, the proposed 3D RRAM shows advanced endurance (>1010 cycles), retention (>104 s), and uniformity. In addition, several synaptic functions observed in the human brain were mimicked. On the basis of the advanced performance, we constructed a novel 3D ANN, whose learning efficiency and recognition accuracy were enhanced significantly compared with those of conventional single-layer ANNs. These findings hold promise for the development of highly efficient, precise, integrated, and stable VLSI neuromorphic computing systems.
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Affiliation(s)
- Chen Lu
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Jialin Meng
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Jiajie Yu
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Jieru Song
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Tianyu Wang
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Hao Zhu
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Qing-Qing Sun
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - David Wei Zhang
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
| | - Lin Chen
- School of Microelectronics, State Key Laboratory of Integrated Chips and Systems, Fudan University, Shanghai 200433, P. R. China
- Zhangjiang Fudan International Innovation Center, Shanghai 201203, China
- National Integrated Circuit Innovation Center, Shanghai 201203, China
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17
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Lee Y, So JH, Koo HJ. A Transparent Hydrogel-Ionic Conductor with High Water Retention and Self-Healing Ability. MATERIALS (BASEL, SWITZERLAND) 2024; 17:288. [PMID: 38255457 PMCID: PMC10817594 DOI: 10.3390/ma17020288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/04/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024]
Abstract
This study presents a transparent and ion-conductive hydrogel with suppressed water loss. The hydrogel comprises agarose polymer doped with sucrose and sodium chloride salt (NaCl-Suc/A hydrogel). Sucrose increases the water retention of the agarose gel, and the Na and Cl ions dissolved in the gel provide ionic conductivity. The NaCl-Suc/A gel shows high retention capability and maintains a 45% water uptake after 4 h of drying at 60 °C without encapsulation at the optimum gel composition. The doped NaCl-Suc/A hydrogel demonstrates improved mechanical properties and ionic conductivity of 1.6 × 10-2 (S/cm) compared to the pristine agarose hydrogel. The self-healing property of the gel restores the electrical continuity when reassembled after cutting. Finally, to demonstrate a potential application of the ion-conductive hydrogel, a transparent and flexible pressure sensor is fabricated using the NaCl-Suc/A hydrogel, and its performance is demonstrated. The results of this study could contribute to solving problems with hydrogel-based devices such as rapid dehydration and poor mechanical properties.
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Affiliation(s)
- Yangwoo Lee
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea;
| | - Ju-Hee So
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology, Ansan 15588, Republic of Korea
| | - Hyung-Jun Koo
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea;
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