1
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Bohn L, Rial-Vázquez J, Nine I, Rúa-Alonso M, Fariñas J, Giráldez-García MA, Mota J, Iglesias-Soler E. Arterial stiffness assessment by pulse wave velocity in postmenopausal women: comparison between noninvasive devices. Menopause 2024; 31:709-715. [PMID: 38916283 DOI: 10.1097/gme.0000000000002383] [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: 06/26/2024]
Abstract
OBJECTIVE This study aimed to ascertain the accuracy of measure arterial stiffness using the HUAWEI GT 3 Pro smartwatch and pOpmètre device against the SphygmoCor (algorithms: intersect tangent and maximum of the second derivate). METHODS Twenty-three physically active postmenopausal women (age: 58.9 ± 3.2 years; body mass index: 26.3 ± 4.8 kg/m 2 ) were recruited. Carotid-femoral pulse wave velocity, finger-toe pulse wave velocity, and wrist-finger pulse wave velocity were obtained using SphygmoCor, pOpmètre and HUAWEI GT 3 Pro devices in a randomized order. Additionally, the pulse mean carotid-femoral and finger-toe pulse transit time was registered for SphygmoCor and pOpmètre, respectively. RESULTS Lower values of pulse wave velocity were recorded by HUAWEI in comparison with SphygmoCor with both algorithms, whereas no significant differences were detected between SphygmoCor and pOpmètre results. Pulse wave velocity values from SphygmoCor were positively correlated with pOpmètre results ( r = 0.464 and r = 0.451 using intersect tangent and second derivative algorithms), whereas this was not the case with those obtained from HUAWEI. Coefficients of bias of Lin's concordance coefficients close to 1 (0.832 and 0.831 for intersect tangent and second derivative algorithm, respectively) and mean bias close to 0 from Bland-Altman analysis suggested an acceptable agreement between pulse wave velocity obtained from SphygmoCor and pOpmètre. CONCLUSIONS Our results suggest an acceptable concordance of pulse wave velocity values recoded by SphygmoCor and pOpmètre, whereas this was not the case for data obtained from HUAWEI GT 3 Pro smartwatch. Therefore, the pOpmètre may be a viable alternative for assessing arterial stiffness, but measurement via the smartwatch device cannot be recommended.
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Affiliation(s)
| | | | - Iván Nine
- University of A Coruna, Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, A Coruña
| | | | - Juan Fariñas
- University of A Coruna, Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, A Coruña
| | - Manuel Avelino Giráldez-García
- University of A Coruna, Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, A Coruña
| | - Jorge Mota
- Research Center in Physical Activity, health and Leisure (CIAFEL)-Faculty of Sports-University of Porto (FADEUP) and Laboratory for Integrative and Translational Research in Population Health (ITR); University of Porto, Porto, Portugal
| | - Eliseo Iglesias-Soler
- University of A Coruna, Performance and Health Group, Department of Physical Education and Sport, Faculty of Sports Sciences and Physical Education, A Coruña
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2
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Tezsezen E, Yigci D, Ahmadpour A, Tasoglu S. AI-Based Metamaterial Design. ACS APPLIED MATERIALS & INTERFACES 2024; 16:29547-29569. [PMID: 38808674 PMCID: PMC11181287 DOI: 10.1021/acsami.4c04486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/16/2024] [Accepted: 05/16/2024] [Indexed: 05/30/2024]
Abstract
The use of metamaterials in various devices has revolutionized applications in optics, healthcare, acoustics, and power systems. Advancements in these fields demand novel or superior metamaterials that can demonstrate targeted control of electromagnetic, mechanical, and thermal properties of matter. Traditional design systems and methods often require manual manipulations which is time-consuming and resource intensive. The integration of artificial intelligence (AI) in optimizing metamaterial design can be employed to explore variant disciplines and address bottlenecks in design. AI-based metamaterial design can also enable the development of novel metamaterials by optimizing design parameters that cannot be achieved using traditional methods. The application of AI can be leveraged to accelerate the analysis of vast data sets as well as to better utilize limited data sets via generative models. This review covers the transformative impact of AI and AI-based metamaterial design for optics, acoustics, healthcare, and power systems. The current challenges, emerging fields, future directions, and bottlenecks within each domain are discussed.
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Affiliation(s)
- Ece Tezsezen
- Graduate
School of Science and Engineering, Koç
University, Istanbul 34450, Türkiye
| | - Defne Yigci
- School
of Medicine, Koç University, Istanbul 34450, Türkiye
| | - Abdollah Ahmadpour
- Department
of Mechanical Engineering, Koç University
Sariyer, Istanbul 34450, Türkiye
| | - Savas Tasoglu
- Department
of Mechanical Engineering, Koç University
Sariyer, Istanbul 34450, Türkiye
- Koç
University Translational Medicine Research Center (KUTTAM), Koç University, Istanbul 34450, Türkiye
- Bogaziçi
Institute of Biomedical Engineering, Bogaziçi
University, Istanbul 34684, Türkiye
- Koç
University Arçelik Research Center for Creative Industries
(KUAR), Koç University, Istanbul 34450, Türkiye
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3
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Du Y, Kim JH, Kong H, Li AA, Jin ML, Kim DH, Wang Y. Biocompatible Electronic Skins for Cardiovascular Health Monitoring. Adv Healthc Mater 2024; 13:e2303461. [PMID: 38569196 DOI: 10.1002/adhm.202303461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 02/27/2024] [Indexed: 04/05/2024]
Abstract
Cardiovascular diseases represent a significant threat to the overall well-being of the global population. Continuous monitoring of vital signs related to cardiovascular health is essential for improving daily health management. Currently, there has been remarkable proliferation of technology focused on collecting data related to cardiovascular diseases through daily electronic skin monitoring. However, concerns have arisen regarding potential skin irritation and inflammation due to the necessity for prolonged wear of wearable devices. To ensure comfortable and uninterrupted cardiovascular health monitoring, the concept of biocompatible electronic skin has gained substantial attention. In this review, biocompatible electronic skins for cardiovascular health monitoring are comprehensively summarized and discussed. The recent achievements of biocompatible electronic skin in cardiovascular health monitoring are introduced. Their working principles, fabrication processes, and performances in sensing technologies, materials, and integration systems are highlighted, and comparisons are made with other electronic skins used for cardiovascular monitoring. In addition, the significance of integrating sensing systems and the updating wireless communication for the development of the smart medical field is explored. Finally, the opportunities and challenges for wearable electronic skin are also examined.
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Affiliation(s)
- Yucong Du
- Institute of Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266071, China
- Institute for Future, Shandong Key Laboratory of Industrial Control Technology, School of Automation, Qingdao University, Qingdao, 266071, China
| | - Ji Hong Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul, 04763, Republic of Korea
- Clean-Energy Research Institute, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hui Kong
- Institute for Future, Shandong Key Laboratory of Industrial Control Technology, School of Automation, Qingdao University, Qingdao, 266071, China
| | - Anne Ailina Li
- Institute for Future, Shandong Key Laboratory of Industrial Control Technology, School of Automation, Qingdao University, Qingdao, 266071, China
| | - Ming Liang Jin
- Institute for Future, Shandong Key Laboratory of Industrial Control Technology, School of Automation, Qingdao University, Qingdao, 266071, China
| | - Do Hwan Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul, 04763, Republic of Korea
- Clean-Energy Research Institute, Hanyang University, Seoul, 04763, Republic of Korea
| | - Yin Wang
- Institute of Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266071, China
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4
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Sytu MRC, Cho DH, Hahm JI. Self-Assembled Block Copolymers as a Facile Pathway to Create Functional Nanobiosensor and Nanobiomaterial Surfaces. Polymers (Basel) 2024; 16:1267. [PMID: 38732737 PMCID: PMC11085100 DOI: 10.3390/polym16091267] [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: 03/27/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024] Open
Abstract
Block copolymer (BCP) surfaces permit an exquisite level of nanoscale control in biomolecular assemblies solely based on self-assembly. Owing to this, BCP-based biomolecular assembly represents a much-needed, new paradigm for creating nanobiosensors and nanobiomaterials without the need for costly and time-consuming fabrication steps. Research endeavors in the BCP nanobiotechnology field have led to stimulating results that can promote our current understanding of biomolecular interactions at a solid interface to the never-explored size regimes comparable to individual biomolecules. Encouraging research outcomes have also been reported for the stability and activity of biomolecules bound on BCP thin film surfaces. A wide range of single and multicomponent biomolecules and BCP systems has been assessed to substantiate the potential utility in practical applications as next-generation nanobiosensors, nanobiodevices, and biomaterials. To this end, this Review highlights pioneering research efforts made in the BCP nanobiotechnology area. The discussions will be focused on those works particularly pertaining to nanoscale surface assembly of functional biomolecules, biomolecular interaction properties unique to nanoscale polymer interfaces, functionality of nanoscale surface-bound biomolecules, and specific examples in biosensing. Systems involving the incorporation of biomolecules as one of the blocks in BCPs, i.e., DNA-BCP hybrids, protein-BCP conjugates, and isolated BCP micelles of bioligand carriers used in drug delivery, are outside of the scope of this Review. Looking ahead, there awaits plenty of exciting research opportunities to advance the research field of BCP nanobiotechnology by capitalizing on the fundamental groundwork laid so far for the biomolecular interactions on BCP surfaces. In order to better guide the path forward, key fundamental questions yet to be addressed by the field are identified. In addition, future research directions of BCP nanobiotechnology are contemplated in the concluding section of this Review.
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Affiliation(s)
- Marion Ryan C. Sytu
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, DC 20057, USA
| | - David H. Cho
- National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, 9000 Rockville Pike, Bethesda, MD 20892, USA;
| | - Jong-in Hahm
- Department of Chemistry, Georgetown University, 37th & O Sts. NW., Washington, DC 20057, USA
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5
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Sun T, Wang W, Wang F, Shen W, Geng L, Zhang Y, Bi M, Gong T, Liu C, Guo C, Yao Z, Wang T, Bai J. A novel universal small-molecule detection platform based on antibody-controlled Cas12a switching. Biosens Bioelectron 2024; 246:115897. [PMID: 38064994 DOI: 10.1016/j.bios.2023.115897] [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: 09/23/2023] [Revised: 11/27/2023] [Accepted: 11/27/2023] [Indexed: 12/30/2023]
Abstract
Molecular diagnostics play an important role in illness detection, prevention, and treatment, and are vital in point-of-care test. In this investigation, a novel CRISPR/Cas12a based small-molecule detection platform was developed using Antibody-Controlled Cas12a Biosensor (ACCBOR), in which antibody would control the trans-cleavage activity of CRISPR/Cas12a. In this system, small-molecule was labeled around the PAM sites of no target sequence(NTS), and antibody would bind on the labeled molecule to prevent the combination of CRISPR/Cas12a, resulting the decrease of trans-cleavage activity. Biotin-, digoxin-, 25-hydroxyvitamin D3 (25-OH-VD3)-labeled NTS and corresponding binding protein were separately used to verify its preformance, showing great universality. Finally, one-pot detection of 25-OH-VD3 was developed, exhibiting high sensitivity and excellent specificity. The limit of detection could be 259.86 pg/mL in serum within 30 min. This assay platform also has the advantages of low cost, easy operation (one-pot method), and fast detection (∼30 min), would be a new possibilities for the highly sensitive detection of other small-molecule targets.
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Affiliation(s)
- Tieqiang Sun
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Wen Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China; School of Public Health and Management, Binzhou Medical College, Shandong, 264003, PR China
| | - Feng Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Weili Shen
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Lu Geng
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Yiyang Zhang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Meng Bi
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Tingting Gong
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Cong Liu
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China
| | - Changjiang Guo
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China; School of Public Health and Management, Binzhou Medical College, Shandong, 264003, PR China
| | - Zhanxin Yao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China.
| | - Tianhui Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China.
| | - Jialei Bai
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, 300050, PR China.
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6
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Zhu H, Sun Z, Wang X, Xia H. A High-Performance Strain Sensor for the Detection of Human Motion and Subtle Strain Based on Liquid Metal Microwire. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:231. [PMID: 38276749 PMCID: PMC10818384 DOI: 10.3390/nano14020231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
Flexible strain sensors have a wide range of applications, such as human motion monitoring, wearable electronic devices, and human-computer interactions, due to their good conformability and sensitive deformation detection. To overcome the internal stress problem of solid sensing materials during deformation and prepare small-sized flexible strain sensors, it is necessary to choose a more suitable sensing material and preparation technology. We report a simple and high-performance flexible strain sensor based on liquid metal nanoparticles (LMNPs) on a polyimide substrate. The LMNPs were assembled using the femtosecond laser direct writing technology to form liquid metal microwires. A wearable strain sensor from the liquid metal microwire was fabricated with an excellent gauge factor of up to 76.18, a good linearity in a wide sensing range, and a fast response/recovery time of 159 ms/120 ms. Due to these extraordinary strain sensing performances, the strain sensor can monitor facial expressions in real time and detect vocal cord vibrations for speech recognition.
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Affiliation(s)
- He Zhu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Zheng Sun
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Xin Wang
- Department of Rheumatology, the First Hospital of Jilin University, Changchun 130012, China;
| | - Hong Xia
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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7
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Meskher H, Belhaouari SB, Sharifianjazi F. Mini review about metal organic framework (MOF)-based wearable sensors: Challenges and prospects. Heliyon 2023; 9:e21621. [PMID: 37954292 PMCID: PMC10632523 DOI: 10.1016/j.heliyon.2023.e21621] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 10/05/2023] [Accepted: 10/25/2023] [Indexed: 11/14/2023] Open
Abstract
Among many types of wearable sensors, MOFs-based wearable sensors have recently been explored in both commercialization and research. There has been much effort in various aspects of the development of MOF-based wearable sensors including but not limited to miniaturization, size control, safety, improvements in conformal and flexible features, improvements in the analytical performance and long-term storage of these devices. Recent progress in the design and deployment of MOFs-based wearable sensors are covered in this paper, as are the remaining obstacles and prospects. This work also highlights the enormous potential for synergistic effects of MOFs used in combination with other nanomaterials for healthcare applications and raise attention toward the economic aspect and market diffusion of MOFs-based wearable sensors.
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Affiliation(s)
- Hicham Meskher
- Division of Process Engineering, College of Science and Technology, Chadli Bendjedid University, 36000, Algeria
| | - Samir Brahim Belhaouari
- Division of Information and Computing Technology, College of Science and Engineering, Hamad Bin Khalifa,Doha, Qatar
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8
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Han X, Lu T, Zhang Z, Wang H, Lu S. Tremella polysaccharide-based conductive hydrogel with anti-freezing and self-healing ability for motion monitoring and intelligent interaction. Int J Biol Macromol 2023; 248:125987. [PMID: 37516220 DOI: 10.1016/j.ijbiomac.2023.125987] [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: 06/14/2023] [Revised: 07/20/2023] [Accepted: 07/23/2023] [Indexed: 07/31/2023]
Abstract
The application of conductive hydrogels in flexible wearable devices has garnered significant attention. In this study, a self-healing, anti-freezing, and fire-resistant hydrogel strain sensor is successfully synthesized by incorporating sustainable natural biological materials, viz. Tremella polysaccharide and silk fiber, into a polyvinyl alcohol matrix with borax cross-linking. The resulting hydrogel exhibits excellent transparency, thermoplasticity, and remarkable mechanical properties, including a notable elongation (1107.3 %) and high self-healing rate (91.11 %) within 5 min, attributed to the dynamic cross-linking effect of hydrogen bonds and borax. A strain sensor based on the prepared hydrogel sensor can be used to accurately monitor diverse human movements, while maintaining exceptional sensing stability and durability under repeated strain cycles. Additionally, a hydrogel touch component is designed that can successfully interact with intelligent electronic devices, encompassing functions like clicking, writing, and drawing. These inherent advantages make the prepared hydrogel a promising candidate for applications in human health monitoring and intelligent electronic device interaction.
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Affiliation(s)
- Xiaokun Han
- Key Laboratory of Rubber-Plastics of Ministry of Education/Shandong Provincial Key Laboratory of Rubber, Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266061, PR China; Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, PR China
| | - Tianyun Lu
- Key Laboratory of Rubber-Plastics of Ministry of Education/Shandong Provincial Key Laboratory of Rubber, Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266061, PR China
| | - Zuocai Zhang
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China
| | - He Wang
- Key Laboratory of Rubber-Plastics of Ministry of Education/Shandong Provincial Key Laboratory of Rubber, Plastics, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266061, PR China
| | - Shaorong Lu
- Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Material Science and Engineering, Guilin University of Technology, Guilin 541004, PR China.
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9
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Khadka B, Lee B, Kim KT. Drug Delivery Systems for Personal Healthcare by Smart Wearable Patch System. Biomolecules 2023; 13:929. [PMID: 37371509 DOI: 10.3390/biom13060929] [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: 04/27/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 06/29/2023] Open
Abstract
Smart wearable patch systems that combine biosensing and therapeutic components have emerged as promising approaches for personalized healthcare and therapeutic platforms that enable self-administered, noninvasive, user-friendly, and long-acting smart drug delivery. Sensing components can continuously monitor physiological and biochemical parameters, and the monitoring signals can be transferred to various stimuli using actuators. In therapeutic components, stimuli-responsive carrier-based drug delivery systems (DDSs) provide on-demand drug delivery in a closed-loop manner. This review provides an overview of the recent advances in smart wearable patch systems, focusing on sensing components, stimuli, and therapeutic components. Additionally, this review highlights the potential of fully integrated smart wearable patch systems for personalized medicine. Furthermore, challenges associated with the clinical applications of this system and future perspectives are discussed, including issues related to drug loading and reloading, biocompatibility, accuracy of sensing and drug delivery, and largescale fabrication.
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Affiliation(s)
- Bikram Khadka
- Department of Biomedicine, Health & Life Convergence Sciences (BK21 Four), Biomedical and Healthcare Research Institute (BHRI), Mokpo National University, Muan-gun 58554, Jeonnam, Republic of Korea
| | - Byeongmoon Lee
- Soft Hybrid Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Ki-Taek Kim
- Department of Biomedicine, Health & Life Convergence Sciences (BK21 Four), Biomedical and Healthcare Research Institute (BHRI), Mokpo National University, Muan-gun 58554, Jeonnam, Republic of Korea
- College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Muan-gun 58554, Jeonnam, Republic of Korea
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10
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Meng X, Cai C, Luo B, Liu T, Shao Y, Wang S, Nie S. Rational Design of Cellulosic Triboelectric Materials for Self-Powered Wearable Electronics. NANO-MICRO LETTERS 2023; 15:124. [PMID: 37166487 PMCID: PMC10175533 DOI: 10.1007/s40820-023-01094-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/05/2023] [Indexed: 05/12/2023]
Abstract
With the rapid development of the Internet of Things and flexible electronic technologies, there is a growing demand for wireless, sustainable, multifunctional, and independently operating self-powered wearable devices. Nevertheless, structural flexibility, long operating time, and wearing comfort have become key requirements for the widespread adoption of wearable electronics. Triboelectric nanogenerators as a distributed energy harvesting technology have great potential for application development in wearable sensing. Compared with rigid electronics, cellulosic self-powered wearable electronics have significant advantages in terms of flexibility, breathability, and functionality. In this paper, the research progress of advanced cellulosic triboelectric materials for self-powered wearable electronics is reviewed. The interfacial characteristics of cellulose are introduced from the top-down, bottom-up, and interfacial characteristics of the composite material preparation process. Meanwhile, the modulation strategies of triboelectric properties of cellulosic triboelectric materials are presented. Furthermore, the design strategies of triboelectric materials such as surface functionalization, interfacial structure design, and vacuum-assisted self-assembly are systematically discussed. In particular, cellulosic self-powered wearable electronics in the fields of human energy harvesting, tactile sensing, health monitoring, human-machine interaction, and intelligent fire warning are outlined in detail. Finally, the current challenges and future development directions of cellulosic triboelectric materials for self-powered wearable electronics are discussed.
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Affiliation(s)
- Xiangjiang Meng
- 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
| | - Bin Luo
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Tao Liu
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Yuzheng Shao
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China
| | - Shuangfei Wang
- 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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11
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Zhu F, Zhao Q. Sensitive CRISPR-Cas12a-Assisted Immunoassay for Small Molecule Detection in Homogeneous Solution. Anal Chem 2023; 95:6769-6774. [PMID: 37079720 DOI: 10.1021/acs.analchem.3c00218] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
Sensitive detection of small molecules is crucial for many applications, like biomedical diagnosis, food safety, and environmental analysis. Here, we describe a sensitive CRISPR-Cas12a-assisted immunoassay for small molecule detection in homogeneous solution. An active DNA (acDNA) modified with a specific small molecule serves as a competitor for antibody binding and an activator of CRISPR-Cas12a. Large-sized antibody binding with this acDNA probe inactivates the collateral cleavage activity of CRISPR-Cas12a due to a steric effect. When free small molecule target exists, it replaces the small molecule-modified acDNA from antibody, triggering catalytic cleavage of DNA reporters by CRISPR-Cas12a, and strong fluorescence is generated. With this strategy, we achieved detection of three important small molecules as models, biotin, digoxin, and folic acid, at picomolar levels by using streptavidin or antibody as recognition elements. With the progress of DNA-encoded small molecules and antibody, the proposed strategy provides a powerful toolbox for detection of small molecules in wide applications.
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Affiliation(s)
- Fengxi Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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12
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Parolo C, Idili A, Heikenfeld J, Plaxco KW. Conformational-switch biosensors as novel tools to support continuous, real-time molecular monitoring in lab-on-a-chip devices. LAB ON A CHIP 2023; 23:1339-1348. [PMID: 36655710 PMCID: PMC10799767 DOI: 10.1039/d2lc00716a] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Recent years have seen continued expansion of the functionality of lab on a chip (LOC) devices. Indeed LOCs now provide scientists and developers with useful and versatile platforms across a myriad of chemical and biological applications. The field still fails, however, to integrate an often important element of bench-top analytics: real-time molecular measurements that can be used to "guide" a chemical response. Here we describe the analytical techniques that could provide LOCs with such real-time molecular monitoring capabilities. It appears to us that, among the approaches that are general (i.e., that are independent of the reactive or optical properties of their targets), sensing strategies relying on binding-induced conformational change of bioreceptors are most likely to succeed in such applications.
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Affiliation(s)
- Claudio Parolo
- Barcelona Institute for Global Health, Hospital Clínic Universitat de Barcelona, 08036, Barcelona, Spain
| | - Andrea Idili
- Department of Chemical Science and Technologies, University of Rome, Tor Vergata, 00133 Rome, Italy
| | - Jason Heikenfeld
- Novel Devices Laboratory, University of Cincinnati, Cincinnati, Ohio, USA
| | - Kevin W Plaxco
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California, USA.
- Interdepartmental Program in Biomolecular Science and Engineering, University of California Santa Barbara, Santa Barbara, California, USA
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13
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Zhu X, Li S, Sun A, Pan Y, Liu W, Wu Y, Zhang G, Shi Y. A mid-infrared focusing grating coupler with a single circular arc element based on germanium on silicon. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:478-484. [PMID: 37091286 PMCID: PMC10113522 DOI: 10.3762/bjnano.14.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/17/2023] [Indexed: 05/03/2023]
Abstract
A mid-infrared (MIR) focusing grating coupler (FGC) with a single circular arc element (CAE) in the front of the gratings based on a germanium-on-silicon (Ge-on-Si) platform is designed and demonstrated. It can be used equivalently to a traditional FGC with all-focusing gratings. By optimizing the structural parameters of the CAE, the combination of a tapered linear grating and the CAE can improve the coupling efficiency to 8.61%, which is twice as large as that of the traditional MIR grating couplers. To the best of our knowledge, it is the highest coupling efficiency in a full-etch grating coupler based on Ge-on-Si. Moreover, the proposed grating coupler can be used for refractive index (RI) sensing, and the maximum sensitivity is 980.7 nm/RIU when the RI changes from 1 to 1.04. By comparing with traditional grating couplers requiring secondary etching, the proposed full-etch grating coupler structure can reduce the complexity of fabrication and can provide a prospective platform for MIR photonic integration and photonic biosensor detection.
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Affiliation(s)
- Xiaojun Zhu
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Shuai Li
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Ang Sun
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Yongquan Pan
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Wen Liu
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Yue Wu
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Guoan Zhang
- School of Information Science and Technology, Nantong University, Nantong 226019, China
| | - Yuechun Shi
- Yongjiang Laboratory, Ningbo 315202, China and Nanjing University, Key Lab Intelligent Opt Sensing & Manipulat, Minist Educ, Nanjing University, Nanjing 210093, China
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14
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You J, Zhang J, Zhang J, Yang Z, Zhang X. Stretchable and Highly Sensitive Strain Sensor Based on a 2D MXene and 1D Whisker Carbon Nanotube Binary Composite Film. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55812-55820. [PMID: 36475594 DOI: 10.1021/acsami.2c18135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We fabricate a 2D MXene and 1D whisker carbon nanotube (WCNT) binary composite, where the MXene layer was sandwiched between two WCNT films, and assemble a flexible resistive-type strain sensor using this composite film. The deformations of the conductive networks trigged by the external mechanical stimuli cause the variations of the number of effective conductive paths, which result in the changes of the electric resistance of composite films. The resistances of the MXene/WCNT composite films that carry the strain information about the external mechanical stimuli are monitored. In addition, we demonstrate the role of the conductive MXene networks and the WCNT networks in responding to the external mechanical stimuli. The MXene networks dominate the variations of the resistance of the strain sensors in the low strain range. In the middle strain range, the deformations of both the MXene networks and the WCNT networks are responsible for the variations of the resistance of the strain sensors. In the high strain range, an "island bridge" like conductive network forms, where MXenes act as islands and WCNTs connect the adjacent MXene islands like bridges. The multiple types of conductive networks lead to the high sensitivity of the MXene/WCNT-based strain sensors over a wide strain range and a wide response window. This stretchable strain sensor exhibits good performances in detecting human muscle motions with a wide strain range and has the potentials of being applicable to wearable electronics.
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Affiliation(s)
- Junbo You
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
| | - Jiapeng Zhang
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
| | - Jinling Zhang
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
| | - Zhaohui Yang
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
- Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China
| | - Xiaohua Zhang
- School of Physical Science and Technology, Soochow University, Suzhou 215006, China
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China
- Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China
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15
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He J, Zhou L, Huang G, Shen J, Chen W, Wang C, Kim A, Zhang Z, Cheng W, Dai S, Ding F, Chen P. Enhanced Label-Free Nanoplasmonic Cytokine Detection in SARS-CoV-2 Induced Inflammation Using Rationally Designed Peptide Aptamer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:48464-48475. [PMID: 36281943 PMCID: PMC9627400 DOI: 10.1021/acsami.2c14748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/13/2022] [Indexed: 06/12/2023]
Abstract
Rapid and precise serum cytokine quantification provides immense clinical significance in monitoring the immune status of patients in rapidly evolving infectious/inflammatory disorders, examplified by the ongoing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. However, real-time information on predictive cytokine biomarkers to guide targetable immune pathways in pathogenic inflammation is critically lacking, because of the insufficient detection range and detection limit in current label-free cytokine immunoassays. In this work, we report a highly sensitive localized surface plasmon resonance imaging (LSPRi) immunoassay for label-free Interleukin 6 (IL-6) detection utilizing rationally designed peptide aptamers as the capture interface. Benefiting from its characteristically smaller dimension and direct functionalization on the sensing surface via Au-S bonding, the peptide-aptamer-based LSPRi immunoassay achieved enhanced label-free serum IL-6 detection with a record-breaking limit of detection down to 4.6 pg/mL, and a wide dynamic range of ∼6 orders of magnitude (values from 4.6 to 1 × 106 pg/mL were observed). The immunoassay was validated in vitro for label-free analysis of SARS-CoV-2 induced inflammation, and further applied in rapid quantification of serum IL-6 profiles in COVID-19 patients. Our peptide aptamer LSPRi immunoassay demonstrates great potency in label-free cytokine detection with unprecedented sensing capability to provide accurate and timely interpretation of the inflammatory status and disease progression, and determination of prognosis.
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Affiliation(s)
- Jiacheng He
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
| | - Lang Zhou
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
| | - Gangtong Huang
- Department of Physics and Astronomy, Clemson University, Clemson, South Carolina29634, United States
| | - Jialiang Shen
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
| | - Wu Chen
- Department of Drug Discovery and Development, Harrison School of Pharmacy, Auburn University, Auburn, Alabama36849, United States
| | - Chuanyu Wang
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
| | - Albert Kim
- Center for Medicine, Health, and Society, Vanderbilt University, Nashville, Tennessee37235, United States
| | - Zhuoyu Zhang
- Department of Mechanical and Aerospace Engineering, New York University, Brooklyn, New York11201, United States
- Department of Biomedical Engineering, New York University, Brooklyn, New York11201, United States
| | - Weiqiang Cheng
- Department of Mechanical and Aerospace Engineering, New York University, Brooklyn, New York11201, United States
- Department of Biomedical Engineering, New York University, Brooklyn, New York11201, United States
| | - Siyuan Dai
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
| | - Feng Ding
- Department of Physics and Astronomy, Clemson University, Clemson, South Carolina29634, United States
| | - Pengyu Chen
- Materials Research and Education Center, Auburn University, Auburn, Alabama36849, United States
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Jia J, Peng Y, Zha XJ, Ke K, Bao RY, Liu ZY, Yang MB, Yang W. Janus and Heteromodulus Elastomeric Fiber Mats Feature Regulable Stress Redistribution for Boosted Strain Sensing Performance. ACS NANO 2022; 16:16806-16815. [PMID: 36194701 DOI: 10.1021/acsnano.2c06482] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Wearable strain sensors have huge potential for applications in healthcare, human-machine interfacing, and augmented reality systems. However, the nonlinear response of the resistance signal to strain has caused considerable difficulty and complexity in data processing and signal transformation, thus impeding their practical applications severely. Herein, we propose a simple way to achieve linear and reproducible resistive signals responding to strain in a relatively wide strain range for flexible strain sensors, which is achieved via the fabrication of Janus and heteromodulus elastomeric fiber mats with micropatterns using microimprinting second processing technology. In detail, both isotropic and anisotropic fiber mats can turn into Janus fiber mats with periodical and heteromodulus micropatterns via controlling the fiber fusion and the diffusion of local macromolecular chains of thermoplastic elastomers. The Janus heterogeneous microstructure allows for stress redistribution upon stretching, thus leading to lower strain hysteresis and improved linearity of resistive signal. Moreover, tunable sensing performance can be achieved by tailoring the size of the micropatterns on the fiber mat surface and the fiber anisotropy. The Janus mat strain sensors with high signal linearity and good reproducibility have a very low strain detection limit, enabling potential applications in human-machine interfacing and intelligent control fields if combined with a wireless communication module.
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Affiliation(s)
- Jin Jia
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Yan Peng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Xiang-Jun Zha
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Kai Ke
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Wei Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
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17
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Ramachandran B, Liao YC. Microfluidic wearable electrochemical sweat sensors for health monitoring. BIOMICROFLUIDICS 2022; 16:051501. [PMID: 36186757 PMCID: PMC9520469 DOI: 10.1063/5.0116648] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Research on remote health monitoring through wearable sensors has attained popularity in recent decades mainly due to aging population and expensive health care services. Microfluidic wearable sweat sensors provide economical, non-invasive mode of sample collection, important physiological information, and continuous tracking of human health. Recent advances in wearable sensors focus on electrochemical monitoring of biomarkers in sweat and can be applicable in various fields like fitness monitoring, nutrition, and medical diagnosis. This review focuses on the evolution of wearable devices from benchtop electrochemical systems to microfluidic-based wearable sensors. Major classification of wearable sensors like skin contact-based and biofluidic-based sensors are discussed. Furthermore, sweat chemistry and related biomarkers are explained in addition to integration of microfluidic systems in wearable sweat sensors. At last, recent advances in wearable electrochemical sweat sensors are discussed, which includes tattoo-based, paper microfluidics, patches, wrist band, and belt-based wearable sensors.
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Affiliation(s)
- Balaji Ramachandran
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Ying-Chih Liao
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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18
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Lin X, Xue H, Li F, Mei H, Zhao H, Zhang T. All-Nanofibrous Ionic Capacitive Pressure Sensor for Wearable Applications. ACS APPLIED MATERIALS & INTERFACES 2022; 14:31385-31395. [PMID: 35771761 DOI: 10.1021/acsami.2c01806] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Currently, with the development of electronic skins (e-skins), wearable pressure sensors with low energy consumption and excellent wearability for long-term physiological signal monitoring are urgently desired but remain a challenge. Capacitive-type devices are desirable candidates for wearable applications, but traditional capacitive pressure sensors are limited by low capacitance and sensitivity. In this study, an all-nanofibrous ionic pressure sensor (IPS) is developed, and the formation of an electrical double layer at the electrode/electrolyte contact interface significantly enhances the capacitance and sensing properties. The IPS is fabricated by sandwiching a nanofibrous ionic gel sensing layer between two thermoplastic polyurethane nanofibrous membranes with graphene electrodes. The IPS has a high sensitivity of 217.5 kPa-1 in the pressure range of 0-5 kPa, which is much higher than that of conventional capacitive pressure sensors. Combined with the rapid response and recovery speed (30 and 60 ms), the IPS is suitable for real-time monitoring of multiple physiological signals. Moreover, the nanofiber network endows the IPS with excellent air permeability and heat dissipation, which guarantees comfort during long-term wearing. This work provides a viable strategy to improve the wearability of wearable sensors, which can promote healthcare and human-machine interaction applications.
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Affiliation(s)
- Xiuzhu Lin
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Hua Xue
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Fan Li
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Haixia Mei
- College of Electronic Information Engineering, Changchun University, Changchun 130022, China
| | - Hongran Zhao
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Tong Zhang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
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19
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Jin P, Fu J, Wang F, Zhang Y, Wang P, Liu X, Jiao Y, Li H, Chen Y, Ma Y, Feng X. A flexible, stretchable system for simultaneous acoustic energy transfer and communication. SCIENCE ADVANCES 2021; 7:eabg2507. [PMID: 34586839 PMCID: PMC8480923 DOI: 10.1126/sciadv.abg2507] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 08/06/2021] [Indexed: 05/02/2023]
Abstract
The use of implantable medical devices, including cardiac pacemakers and brain pacemakers, is becoming increasingly prevalent. However, surgically replacing batteries owing to their limited lifetime is a drawback of those devices. Such an operation poses a risk to patients—a problem that, to date, has not yet been solved. Furthermore, current devices are large and rigid, potentially causing patient discomfort after implantation. To address this problem, we developed a thin, battery-free, flexible, implantable system based on flexible electronic technology that can not only achieve wireless recharging and communication simultaneously via ultrasound but also perform many current device functions, including in vivo physiological monitoring and cardiac pacing. To prove this, an animal experiment was conducted involving creating a cardiac arrest model and powering the system by ultrasound. The results showed that it automatically detected abnormal heartbeats and responded by electrically stimulating the heart, demonstrating the device’s potential clinical utility for emergent treatment.
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Affiliation(s)
- Peng Jin
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Ji Fu
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Fengle Wang
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Yingchao Zhang
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Peng Wang
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Xin Liu
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Yang Jiao
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Hangfei Li
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Ying Chen
- Institute of Flexible Electronics Technology of THU Jiaxing, Zhejiang 314000, China
- Qiantang Science and Technology Innovation Center, Hangzhou 310016, China
| | - Yinji Ma
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
| | - Xue Feng
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
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20
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Chen S, Qi J, Fan S, Qiao Z, Yeo JC, Lim CT. Flexible Wearable Sensors for Cardiovascular Health Monitoring. Adv Healthc Mater 2021; 10:e2100116. [PMID: 33960133 DOI: 10.1002/adhm.202100116] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/15/2021] [Indexed: 12/26/2022]
Abstract
Cardiovascular diseases account for the highest mortality globally, but recent advances in wearable technologies may potentially change how these illnesses are diagnosed and managed. In particular, continuous monitoring of cardiovascular vital signs for early intervention is highly desired. To this end, flexible wearable sensors that can be comfortably worn over long durations are gaining significant attention. In this review, advanced flexible wearable sensors for monitoring cardiovascular vital signals are outlined and discussed. Specifically, the functional materials, configurations, mechanisms, and recent advances of these flexible sensors for heart rate, blood pressure, blood oxygen saturation, and blood glucose monitoring are highlighted. Different mechanisms in bioelectric, mechano-electric, optoelectric, and ultrasonic wearable sensors are presented to monitor cardiovascular vital signs from different body locations. Present challenges, possible strategies, and future directions of these wearable sensors are also discussed. With rapid development, these flexible wearable sensors will potentially be applicable for both medical diagnosis and daily healthcare use in tackling cardiovascular diseases.
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Affiliation(s)
- Shuwen Chen
- Institute for Health Innovation and Technology (iHealthtech) National University of Singapore Singapore 117599 Singapore
| | - Jiaming Qi
- Department of Biomedical Engineering National University of Singapore Singapore 117583 Singapore
| | - Shicheng Fan
- Department of Biomedical Engineering National University of Singapore Singapore 117583 Singapore
| | - Zheng Qiao
- Department of Biomedical Engineering National University of Singapore Singapore 117583 Singapore
| | - Joo Chuan Yeo
- Institute for Health Innovation and Technology (iHealthtech) National University of Singapore Singapore 117599 Singapore
| | - Chwee Teck Lim
- Institute for Health Innovation and Technology (iHealthtech) National University of Singapore Singapore 117599 Singapore
- Department of Biomedical Engineering National University of Singapore Singapore 117583 Singapore
- Mechanobiology Institute National University of Singapore Singapore 117411 Singapore
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21
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Self-healing Ionic Liquid-based Electronics and Beyond. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2627-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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22
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He F, You X, Wang W, Bai T, Xue G, Ye M. Recent Progress in Flexible Microstructural Pressure Sensors toward Human-Machine Interaction and Healthcare Applications. SMALL METHODS 2021; 5:e2001041. [PMID: 34927827 DOI: 10.1002/smtd.202001041] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/17/2020] [Indexed: 05/19/2023]
Abstract
With the rapid growth of artificial intelligence, wearable electronic devices have caught intensive research interest recently. Flexible sensors, as the significant part of them, have become the focus of research. Particularly, flexible microstructural pressure sensors (FMPSs) have attracted extensive attention because of their controllable shape, small size, and high sensitivity. Microstructures are of great significance to improve the sensitivity and response time of FMPSs. The FMPSs present great application prospects in medical health, human-machine interaction, electronic products, and so on. In this review, a series of microstructures (e.g., wave, pillar, and pyramid shapes) which have been elaborately designed to effectively enhance the sensing performance of FMPSs are introduced in detail. Various fabrication strategies of these FMPSs are comprehensively summarized, including template (e.g., silica, anodic aluminum oxide, and bionic patterns), pre-stressing, and magnetic field regulation methods. In addition, the materials (e.g., carbon, polymer, and piezoelectric materials) used to prepare FMPSs are also discussed. Moreover, the potential applications of FMPSs in human-machine interaction and healthcare fields are emphasized as well. Finally, the advantages and latest development of FMPSs are further highlighted, and the challenges and potential prospects of high-performance FMPSs are outlined.
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Affiliation(s)
- Faliang He
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Xingyan You
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Weiguo Wang
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Tian Bai
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Gaofei Xue
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
| | - Meidan Ye
- Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute of Xiamen University, Shenzhen, 518057, China
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23
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Sharma A, Badea M, Tiwari S, Marty JL. Wearable Biosensors: An Alternative and Practical Approach in Healthcare and Disease Monitoring. Molecules 2021; 26:748. [PMID: 33535493 PMCID: PMC7867046 DOI: 10.3390/molecules26030748] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 12/18/2022] Open
Abstract
With the increasing prevalence of growing population, aging and chronic diseases continuously rising healthcare costs, the healthcare system is undergoing a vital transformation from the traditional hospital-centered system to an individual-centered system. Since the 20th century, wearable sensors are becoming widespread in healthcare and biomedical monitoring systems, empowering continuous measurement of critical biomarkers for monitoring of the diseased condition and health, medical diagnostics and evaluation in biological fluids like saliva, blood, and sweat. Over the past few decades, the developments have been focused on electrochemical and optical biosensors, along with advances with the non-invasive monitoring of biomarkers, bacteria and hormones, etc. Wearable devices have evolved gradually with a mix of multiplexed biosensing, microfluidic sampling and transport systems integrated with flexible materials and body attachments for improved wearability and simplicity. These wearables hold promise and are capable of a higher understanding of the correlations between analyte concentrations within the blood or non-invasive biofluids and feedback to the patient, which is significantly important in timely diagnosis, treatment, and control of medical conditions. However, cohort validation studies and performance evaluation of wearable biosensors are needed to underpin their clinical acceptance. In the present review, we discuss the importance, features, types of wearables, challenges and applications of wearable devices for biological fluids for the prevention of diseased conditions and real-time monitoring of human health. Herein, we summarize the various wearable devices that are developed for healthcare monitoring and their future potential has been discussed in detail.
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Affiliation(s)
- Atul Sharma
- School of Chemistry, Monash University, Clayton, Melbourne, VIC 3800, Australia
- Department of Pharmaceutical Chemistry, SGT College of Pharmacy, SGT University, Budhera, Gurugram, Haryana 122505, India
| | - Mihaela Badea
- Fundamental, Prophylactic and Clinical Specialties Department, Faculty of Medicine, Transilvania University of Brasov, 500036 Brasov, Romania;
| | - Swapnil Tiwari
- School of Studies in Chemistry, Pt Ravishankar Shukla University, Raipur, CHATTISGARH 492010, India;
| | - Jean Louis Marty
- University of Perpignan via Domitia, 52 Avenue Paul Alduy, CEDEX 9, 66860 Perpignan, France
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24
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Du X, Tian M, Sun G, Li Z, Qi X, Zhao H, Zhu S, Qu L. Self-Powered and Self-Sensing Energy Textile System for Flexible Wearable Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:55876-55883. [PMID: 33269916 DOI: 10.1021/acsami.0c16305] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Intelligent textiles require flexible power sources that can be seemingly integrated with a variety of electronic devices to realize new smart wearable applications. However, current research mainly focuses on the design of the textile structures, often ignoring the importance of seamless configuration. This approach results in an uncomfortable experience when the device is worn and makes it difficult to smoothly connect each monofunctional device. The view of the yarn structure, a multifunctional yarn-based wearable system is fabricated through combining seamless strain sensors and energy storage devices. Yarn deposited with poly(3,4-ethylenedioxythiophene) (PEDOT) via in situ polymerization is then prepared as a highly conductive yarn sensor and a flexible yarn-shaped supercapacitor (SC). All-yarn-based SCs are incorporated with strain sensors within self-powered flexible devices designed to detect human motion. Multiple textile structures can be woven into garments including power supply to sensors, with promising application potential across wearable electronics and smart clothing.
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Affiliation(s)
- Xianjing Du
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
| | | | - Guosheng Sun
- Key Laboratory for Robot & Intelligent Technology of Shandong Province, Shandong University of Science and Technology, Qingdao 266590, China
| | - Zengqing Li
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Xiangjun Qi
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Hongtao Zhao
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Shifeng Zhu
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Lijun Qu
- Research Center for Intelligent and Wearable Technology, College of Textiles and Clothing, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, P. R. China
- Jiangsu College of Engineering and Technology, Nantong, Jiangsu 226007, P. R. China
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Yin T, Long L, Tang X, Qiu M, Liang W, Cao R, Zhang Q, Wang D, Zhang H. Advancing Applications of Black Phosphorus and BP-Analog Materials in Photo/Electrocatalysis through Structure Engineering and Surface Modulation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2001431. [PMID: 33042754 PMCID: PMC7539224 DOI: 10.1002/advs.202001431] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 05/24/2020] [Indexed: 05/22/2023]
Abstract
Black phosphorus (BP), an emerging 2D material semiconductor material, exhibits unique properties and promising application prospects for photo/electrocatalysis. However, the applications of BP in photo/electrocatalysis are hampered by the instability as well as low catalysis efficiency. Recently, tremendous efforts have been dedicated toward modulating its intrinsic structure, electronic property, and charge separation for enhanced photo/electrocatalytic performance through structure engineering. Simultaneously, the search for new substitute materials that are BP-analogous is ongoing. Herein, the latest theoretical and experimental progress made in the structural/surface engineering strategies and advanced applications of BP and BP-analog materials in relation to photo/electrocatalysis are extensively explored, and a presentation of the future opportunities and challenges of the materials is included at the end.
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Affiliation(s)
- Teng Yin
- School of Electronics and InformationHangzhou Dianzi UniversityHangzhou310018China
- Institute of Microscale OptoelectronicsCollaborative Innovation Centre for Optoelectronic Science & TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060China
| | - Liyuan Long
- School of Electronics and InformationHangzhou Dianzi UniversityHangzhou310018China
| | - Xian Tang
- School of Physics and Optoelectronic EngineeringFoshan UniversityFoshan528000China
| | - Meng Qiu
- Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China)Ministry of EducationQingdao266100P. R. China
| | - Weiyuan Liang
- Institute of Microscale OptoelectronicsCollaborative Innovation Centre for Optoelectronic Science & TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060China
| | - Rui Cao
- Institute of Microscale OptoelectronicsCollaborative Innovation Centre for Optoelectronic Science & TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060China
| | - Qizhen Zhang
- Advanced Institute of Information TechnologyPeking UniversityHangzhou311215China
| | - Dunhui Wang
- School of Electronics and InformationHangzhou Dianzi UniversityHangzhou310018China
| | - Han Zhang
- Institute of Microscale OptoelectronicsCollaborative Innovation Centre for Optoelectronic Science & TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro‐Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy (SZ)Shenzhen UniversityShenzhen518060China
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Dinh T, Nguyen T, Phan HP, Nguyen NT, Dao DV, Bell J. Stretchable respiration sensors: Advanced designs and multifunctional platforms for wearable physiological monitoring. Biosens Bioelectron 2020; 166:112460. [PMID: 32862846 DOI: 10.1016/j.bios.2020.112460] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/21/2022]
Abstract
Respiration signals are a vital sign of life. Monitoring human breath provides critical information for health assessment, diagnosis, and treatment for respiratory diseases such as asthma, chronic bronchitis, and emphysema. Stretchable and wearable respiration sensors have recently attracted considerable interest toward monitoring physiological signals in the era of real time and portable healthcare systems. This review provides a snapshot on the recent development of stretchable sensors and wearable technologies for respiration monitoring. The article offers the fundamental guideline on the sensing mechanisms and design concepts of stretchable sensors for detecting vital breath signals such as temperature, humidity, airflow, stress and strain. A highlight on the recent progress in the integration of variable sensing components outlines feasible pathways towards multifunctional and multimodal sensor platforms. Structural designs of nanomaterials and platforms for stretchable respiration sensors are reviewed.
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Affiliation(s)
- Toan Dinh
- School of Mechanical and Electrical Engineering, University of Southern Queensland, Queensland, 4350, Australia.
| | - Thanh Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Queensland, 4111, Australia
| | - Hoang-Phuong Phan
- Queensland Micro- and Nanotechnology Centre, Griffith University, Queensland, 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Queensland, 4111, Australia
| | - Dzung Viet Dao
- Queensland Micro- and Nanotechnology Centre, Griffith University, Queensland, 4111, Australia
| | - John Bell
- School of Mechanical and Electrical Engineering, University of Southern Queensland, Queensland, 4350, Australia
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Tian K, Sui G, Yang P, Deng H, Fu Q. Ultrasensitive Thin-Film Pressure Sensors with a Broad Dynamic Response Range and Excellent Versatility Toward Pressure, Vibration, Bending, and Temperature. ACS APPLIED MATERIALS & INTERFACES 2020; 12:20998-21008. [PMID: 32293861 DOI: 10.1021/acsami.0c05618] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Flexible pressure sensors with high sensitivity and wide pressure response range are attracting considerable research interest for their potential applications as e-skins. Nowadays, it seems a dilemma to realize high-performance, multifunctional pressure sensors with a cost-effective, scalable strategy, which can simplify wearable sensing systems without additional signal processing, enabling device miniaturization and low power consumption. Herein, pressure sensors with ultrahigh sensitivity and a broad response pressure range are developed with a low-cost, facile method by combining strain-induced percolation behavior and contact area contributions. Because of their special surface structure and strain-induced conductive network formation behavior, these unique pressure sensors exhibit wide sensing range of 1 Pa to 500 kPa, ultrahigh sensitivity (1 × 106 and 3.1 × 104 kPa-1 in the pressure ranges of 1 Pa to 20 kPa and 20-500 kPa, respectively), fast signal response (<50 ms), low detection limit (1 Pa), and high stability over 500 loading/unloading cycles. These characteristics allow the devices to work as e-skins to monitor human pulse signals and finger touch. Moreover, these sensors illustrate precise electrical response to mechanical vibration, bending, and temperature stimuli, which afford the ability of detecting cell phone call-in vibration signals, joint bending, spatial pressure, and temperature distributions, indicating promising applications in next-generation wearable, multifunctional e-skins.
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Affiliation(s)
- Ke Tian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Guopeng Sui
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Pei Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Hua Deng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, PR China
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Zheng Y, Yu Z, Mao G, Li Y, Pravarthana D, Asghar W, Liu Y, Qu S, Shang J, Li R. A Wearable Capacitive Sensor Based on Ring/Disk-Shaped Electrode and Porous Dielectric for Noncontact Healthcare Monitoring. GLOBAL CHALLENGES (HOBOKEN, NJ) 2020; 4:1900079. [PMID: 32328287 PMCID: PMC7175022 DOI: 10.1002/gch2.201900079] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 02/22/2020] [Accepted: 02/24/2020] [Indexed: 05/31/2023]
Abstract
Wearable sensors are gradually enabling decentralized healthcare systems. However, these sensors need to be closely attached to skin, which is unsuitable for long-term dynamic health monitoring of the patients, such as infants or persons with burn injuries. Here, a wearable capacitive sensor based on the capacitively coupled effect for healthcare monitoring in noncontact mode is reported. It consists of a ring-shaped top electrode, a disk-shaped bottom electrode, and a porous dielectric layer with low permittivity. This unique design enhanced the capacitively coupled effect of the sensor, which enables a high noncontact detectivity of capacitance change. When an object approaches the sensor, its capacitance change (ΔC/C i = -38.7%) is 3-5 times higher than that of previously reported sensors. Meanwhile, the sensor is insensitive to the stretching strain and pressure (ΔC/C i < 5%) due to the unique ring-shaped electrode and the incompressible closed cells of the porous dielectric material, respectively. Finally, various human physiological signals (pulse and respiratory) are recorded in noncontact mode, where a person wears loose and soft clothes implanted with the sensor. Thus, it is promising to build smart healthcare clothes based on it to develop wearable decentralized healthcare systems.
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Affiliation(s)
- Ya‐Nan Zheng
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- College of Materials Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Zhe Yu
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- College of Materials Science and Opto‐Electronic TechnologyUniversity of Chinese Academy of SciencesBeijing100049P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Guoyong Mao
- State Key Laboratory of Fluid Power and Mechatronic SystemKey Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceDepartment of Engineering MechanicsZhejiang UniversityHangzhou310027China
| | - Yunyao Li
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- College of Information EngineeringNanjing University of Finance and EconomicsNanjing210046China
| | - Dhanapal Pravarthana
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Waqas Asghar
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Yiwei Liu
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Shaoxing Qu
- State Key Laboratory of Fluid Power and Mechatronic SystemKey Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceDepartment of Engineering MechanicsZhejiang UniversityHangzhou310027China
| | - Jie Shang
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
| | - Run‐Wei Li
- CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
- Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201P. R. China
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Sun Z, Yang S, Zhao P, Zhang J, Yang Y, Ye X, Zhao X, Cui N, Tong Y, Liu Y, Chen X, Tang Q. Skin-like Ultrasensitive Strain Sensor for Full-Range Detection of Human Health Monitoring. ACS APPLIED MATERIALS & INTERFACES 2020; 12:13287-13295. [PMID: 32100528 DOI: 10.1021/acsami.9b21751] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of strain sensors with high sensitivity and stretchability, which can accurately detect different human activities such as subtle physiological signals and large-scale joint motions is essential for disease diagnosis and human health monitoring. However, achieving both high sensitivity and stretchability is still an enormous challenge at the moment, particularly for intrinsically stretchable strain sensors. Herein, utilizing large differences in the conductivity and stretchability of micropatterned Au and SWCNTs, we present an ultrasensitive intrinsically stretchable strain sensor by a one-step photolithography process. Its high sensitivity is inspired from spiders' slit organ and the high stretchability is enlightened from spiders' neural pathway. The skin-like sensor exhibits many superior merits, including ultrahigh sensitivity (gauge factors of 7.1 × 104 to 3.4 × 106), wide detection range (up to 100% strain), excellent durability (1000 cycles), ultralow limit of detection (0.1% strain), fast response (1.3 ms), and minimal feature size (≤100 μm). These fascinating merits allow the strain sensor to precisely detect diverse human activities. This work opens up a feasible path to fabricate highly sensitive and stretchable strain sensors, presenting their promising potential in future personalized healthcare, as electronic skins, and being a portable friendly human-machine interaction system.
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Affiliation(s)
- Zijing Sun
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Shuo Yang
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Pengfei Zhao
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Junmo Zhang
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yahan Yang
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Xiaolin Ye
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Xiaoli Zhao
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Nan Cui
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yanhong Tong
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yichun Liu
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Xi Chen
- Instrumental Analysis and Research Center, Dalian University of Technology, Panjin 124221, China
| | - Qingxin Tang
- Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
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31
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Ruan L, Zhao Y, Chen Z, Zeng W, Wang S, Liang D, Zhao J. A Self-Powered Flexible Thermoelectric Sensor and Its Application on the Basis of the Hollow PEDOT:PSS Fiber. Polymers (Basel) 2020; 12:polym12030553. [PMID: 32138271 PMCID: PMC7182963 DOI: 10.3390/polym12030553] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/27/2020] [Accepted: 03/01/2020] [Indexed: 11/16/2022] Open
Abstract
The thermoelectric (TE) fiber, based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which possesses good flexibility, a low cost, good environmental stability and non-toxicity, has attracted more attention due to its promising applications in energy harvesting. This study presents a self-powered flexible sensor based on the TE properties of the hollow PEDOT:PSS fiber. The hollow structure of the fiber was synthesized using traditional wet spinning. The sensor was applied to an application for finger touch, and showed both long-term stability and good reliability towards external force. The sensor had a high scalability and was simple to develop. When figures touched the sensors, a temperature difference of 6 °C was formed between the figure and the outside environment. The summit output voltages of the sensors with 1 to 5 legs gradually increased from 90.8 μV to 404 μV. The time needed for the output voltage to reach 90% of its peak value is only 2.7 s. Five sensors of legs ranging from 1 to 5 were used to assemble the selector. This study may provide a new proposal to produce a self-powered, long-term and stable skin sensor, which is suitable for wearable devices in personal electronic fields.
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Affiliation(s)
- Limin Ruan
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
- Correspondence: (L.R.); (D.L.); (J.Z.); Tel.:+86-0551-63861722 (L.R., D.L. & J.Z.)
| | - Yanjie Zhao
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
| | - Zihao Chen
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
| | - Wei Zeng
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
| | - Siliang Wang
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
| | - Dong Liang
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
- Correspondence: (L.R.); (D.L.); (J.Z.); Tel.:+86-0551-63861722 (L.R., D.L. & J.Z.)
| | - Jinling Zhao
- National Engineering Research Center for Analysis and Application of Agro-Ecological Big Data, Anhui University, No. 111 Jiulong Road, Hefei 230601, China; (Y.Z.); (W.Z.); (S.W.)
- School of Electronics and Information Engineering, Anhui University, No. 111 Jiulong Road, Hefei 230601, China;
- Correspondence: (L.R.); (D.L.); (J.Z.); Tel.:+86-0551-63861722 (L.R., D.L. & J.Z.)
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Luo J, Fan JB, Wang S. Recent Progress of Microfluidic Devices for Hemodialysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1904076. [PMID: 31535786 DOI: 10.1002/smll.201904076] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/31/2019] [Indexed: 06/10/2023]
Abstract
Microfluidic hemodialysis techniques have recently attracted great attention in the treatment of kidney disease due to their advantages of portability and wearability as well as their great potential for replacing clinical hospital-centered blood purification with continuous in-home hemodialysis. This Review summarizes the recent progress in microfluidic devices for hemodialysis. First, the history of kidney-inspired hemodialysis is introduced. Then, recent achievements in the preparation of microfluidic devices and hemodialysis nanoporous membrane materials are presented and categorized. Subsequently, attention is drawn to the recent progress of nanoporous membrane-based microfluidic devices for hemodialysis. Finally, the challenges and opportunities of hemodialysis microfluidic devices in the future are also discussed. This Review is expected to provide a comprehensive guide for the design of hemodialysis microfluidic devices that are closely related to clinical applications.
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Affiliation(s)
- Jing Luo
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jun-Bing Fan
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Shutao Wang
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Wang T, Wang M, Yang L, Li Z, Loh XJ, Chen X. Cyber-Physiochemical Interfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905522. [PMID: 31944425 DOI: 10.1002/adma.201905522] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 10/07/2019] [Indexed: 06/10/2023]
Abstract
Living things rely on various physical, chemical, and biological interfaces, e.g., somatosensation, olfactory/gustatory perception, and nervous system response. They help organisms to perceive the world, adapt to their surroundings, and maintain internal and external balance. Interfacial information exchanges are complicated but efficient, delicate but precise, and multimodal but unisonous, which has driven researchers to study the science of such interfaces and develop techniques with potential applications in health monitoring, smart robotics, future wearable devices, and cyber physical/human systems. To understand better the issues in these interfaces, a cyber-physiochemical interface (CPI) that is capable of extracting biophysical and biochemical signals, and closely relating them to electronic, communication, and computing technology, to provide the core for aforementioned applications, is proposed. The scientific and technical progress in CPI is summarized, and the challenges to and strategies for building stable interfaces, including materials, sensor development, system integration, and data processing techniques are discussed. It is hoped that this will result in an unprecedented multi-disciplinary network of scientific collaboration in CPI to explore much uncharted territory for progress, providing technical inspiration-to the development of the next-generation personal healthcare technology, smart sports-technology, adaptive prosthetics and augmentation of human capability, etc.
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Affiliation(s)
- Ting Wang
- Innovative Center for Flexible Devices (iFLEX), Max Planck - NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Ming Wang
- Innovative Center for Flexible Devices (iFLEX), Max Planck - NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Le Yang
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Zhuyun Li
- Innovative Center for Flexible Devices (iFLEX), Max Planck - NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Xiaodong Chen
- Innovative Center for Flexible Devices (iFLEX), Max Planck - NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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Bishara H, Nagel A, Levanon M, Berger S. Amino acids nanocrystals for piezoelectric detection of ultra-low mechanical pressure. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110468. [PMID: 31923955 DOI: 10.1016/j.msec.2019.110468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 10/17/2019] [Accepted: 11/19/2019] [Indexed: 11/27/2022]
Abstract
Developing biocompatible nano-materials with the ability to detect ultra-low mechanical pressure is promising for biomedical sensors. This paper reports the detection of pressure as low as 1 Pa in the environmental pressure of 1 atm (10-3% pressure change) by nanocrystals of amino acids glycine and alanine through the piezoelectric effect. Piezoelectricity enables detection of pressure by a change of dielectric polarization when the material is subjected to external pressure. This work exploits the non-centro-symmetric structure of some amino acids and their weak hydrogen bonds to develop sensitive mechanical pressure sensors. The β-glycine and l-alanine nanocrystals were grown from aqueous solution inside porous alumina substrate. The nanocrystals exhibit pronounced preferred crystallographic orientation. The sensitive piezoelectric response to ultra-low mechanical pressure is discussed based on atomic and crystal symmetry considerations.
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Affiliation(s)
- Hanna Bishara
- Faculty of Materials Science and Engineering, Technion, 32000 Haifa, Israel.
| | - Alina Nagel
- Faculty of Materials Science and Engineering, Technion, 32000 Haifa, Israel
| | - Maya Levanon
- Faculty of Materials Science and Engineering, Technion, 32000 Haifa, Israel
| | - Shlomo Berger
- Faculty of Materials Science and Engineering, Technion, 32000 Haifa, Israel
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Zhang D, Ren B, Zhang Y, Xu L, Huang Q, He Y, Li X, Wu J, Yang J, Chen Q, Chang Y, Zheng J. From design to applications of stimuli-responsive hydrogel strain sensors. J Mater Chem B 2020; 8:3171-3191. [DOI: 10.1039/c9tb02692d] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Stimuli-responsive hydrogel strain sensors that synergize the advantages of both hydrogel and smart functional materials have attracted increasing interest from material design to emerging applications in health monitors and human–machine interfaces.
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36
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Sun Y, Yang M, Guo Y, Cheng M, Dong B, Shi F. A Photowelding Strategy for Conductivity Restoration in Flexible Circuits. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yunyu Sun
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou 215123 Jiangsu China
| | - Mingcheng Yang
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
- School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Yutong Guo
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou 215123 Jiangsu China
| | - Mengjiao Cheng
- Beijing Laboratory of Biomedical Materials and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Bin Dong
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou 215123 Jiangsu China
| | - Feng Shi
- Beijing Laboratory of Biomedical Materials and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
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Sun Y, Yang M, Guo Y, Cheng M, Dong B, Shi F. A Photowelding Strategy for Conductivity Restoration in Flexible Circuits. Angew Chem Int Ed Engl 2019; 59:1098-1102. [PMID: 31642166 DOI: 10.1002/anie.201909965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Indexed: 01/28/2023]
Abstract
Light-driven micropumps, which are based on electro-osmosis with the electric field generated by photocatalytic reactions, are among most attractive research topics in chemical micromotors. Until now, research in this field has mainly been focused on the directional motion or collective behavior of microparticles, which lack practical applications. In this study, we have developed a photowelding strategy for repeated photoinduced conductivity recovery of cracked flexible circuits. We immersed the circuit in a suspension of conductive healing particles and applied photoillumination to the crack; photocatalysis of a predeposited pentacene (PEN) layer triggered electro-osmotic effects to gather conductive particles at the crack, thus leading to conductivity recovery of the circuit. This photowelding strategy is a novel application of light-driven micropumps and photocatalysis for conductivity restoration.
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Affiliation(s)
- Yunyu Sun
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, Jiangsu, China
| | - Mingcheng Yang
- Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yutong Guo
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, Jiangsu, China
| | - Mengjiao Cheng
- Beijing Laboratory of Biomedical Materials and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Bin Dong
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, Jiangsu, China
| | - Feng Shi
- Beijing Laboratory of Biomedical Materials and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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Zhang Z, Azizi M, Lee M, Davidowsky P, Lawrence P, Abbaspourrad A. A versatile, cost-effective, and flexible wearable biosensor for in situ and ex situ sweat analysis, and personalized nutrition assessment. LAB ON A CHIP 2019; 19:3448-3460. [PMID: 31498355 DOI: 10.1039/c9lc00734b] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Point-of-care (POC) diagnostics have shown excellent potential in rapid biological analysis and health/disease monitoring. Here, we introduce a versatile, cost-effective, flexible, and wearable POC biomarker patch for effective sweat collection and health monitoring. We design and fabricate channels/patterns on filter paper using wax printing technology, which can direct sweat to collection and biomarker detection zones on the proposed platform. The detection zones are designed to measure the amount of collected sweat, in addition to measuring the sweat pH, and glucose (a potential diabetic biomarker), and lactate concentrations. It is significantly challenging to measure glucose in human sweat by colorimetric methods due to the extremely low glucose levels found in this medium. However, we overcame this issue by effectively engineering our wearable biosensor for optimal intake, storage, and evaporation of sweat. Our design concentrates the colorant (indicator) into a small detection zone and significantly increases the sensitivity for the sweat glucose sensing reactions. The device can thus detect glucose in physiological glucose concentration range of 50-300 μM. This cost-effective and wearable biosensor can provide instant in situ quantitative results for targets of interest, such as glucose, pH, and lactate, when coupled with the imaging and computing functionalities of smartphones. Meanwhile, it is also feasible to extract the air-dried sweat from the storage zone for further ex situ measurements of a broader portfolio of biomarkers, leading to applications of our wearable biosensor in personalized nutrition and medicine.
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Affiliation(s)
- Zhong Zhang
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, Ithaca 14853, NY, USA.
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Yao S, Yang J, Poblete FR, Hu X, Zhu Y. Multifunctional Electronic Textiles Using Silver Nanowire Composites. ACS APPLIED MATERIALS & INTERFACES 2019; 11:31028-31037. [PMID: 31373192 DOI: 10.1021/acsami.9b07520] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Textiles represent an appealing platform for continuous wearable applications due to the exceptional combination of compliance, water vapor permeability, and comfortableness for long-term wear. We present mechanically and electrically robust integration of nanocomposites with textiles by laser scribing and heat press lamination. The simple and scalable integration technique enables multifunctional E-textiles without compromising the stretchability, wearability, and washability of textiles. The textile-integrated patterns exhibit small line width (135 μm), low sheet resistance (0.2 Ω/sq), low Young's modulus, good washability, and good electromechanical performance up to 50% strain, which is desirable for wearable and user-friendly electronic textiles. To demonstrate the potential utility, we developed an integrated textile patch comprising four dry electrophysiological electrodes, a capacitive strain sensor, and a wireless heater for electrophysiological monitoring, motion tracking, and thermotherapy, respectively. Beyond the applications demonstrated in this paper, the materials and methods presented here pave the way for various other wearable applications in health care, activity tracking, rehabilitation, sports medicine, and human-machine interactions.
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Affiliation(s)
- Shanshan Yao
- Department of Mechanical and Aerospace Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
| | - Ji Yang
- MOE Key Laboratory for Intelligent Networks and Network Security , Xi'an Jiaotong University , Xi'an , Shaanxi 710049 , China
| | - Felipe R Poblete
- Department of Mechanical and Aerospace Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
| | - Xiaogang Hu
- Joint Department of Biomedical Engineering , University of North Carolina-Chapel Hill and NC State University , Chapel Hill , North Carolina 27599 , United States
| | - Yong Zhu
- Department of Mechanical and Aerospace Engineering , North Carolina State University , Raleigh , North Carolina 27695 , United States
- Joint Department of Biomedical Engineering , University of North Carolina-Chapel Hill and NC State University , Chapel Hill , North Carolina 27599 , United States
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40
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Zhu B, Ling Y, Yap LW, Yang M, Lin F, Gong S, Wang Y, An T, Zhao Y, Cheng W. Hierarchically Structured Vertical Gold Nanowire Array-Based Wearable Pressure Sensors for Wireless Health Monitoring. ACS APPLIED MATERIALS & INTERFACES 2019; 11:29014-29021. [PMID: 31322334 DOI: 10.1021/acsami.9b06260] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We have recently demonstrated that vertically aligned gold nanowires (v-AuNWs) are outstanding material candidates for wearable biomedical sensors toward real-time and noninvasive health monitoring because of their excellent tunable electrical conductivity, biocompatibility, chemical inertness, and wide electrochemical window. Here, we show that v-AuNWs could also be used to design a high-performance wearable pressure sensor when combined with rational structural engineering such as pyramid microarray-based hierarchical structures. The as-fabricated pressure sensor featured a low operation voltage of 0.1 V, high sensitivity in a low-pressure regime, a fast response time of <10 ms, and high durability with stable signals for the 10 000 cycling test. In conjunction with printed electrode arrays, we could generate a multiaxial map for spatial pressure detection. Furthermore, our flexible pressure sensor could be seamlessly connected with a Bluetooth low-energy module to detect high-quality artery pulses in a wireless manner. Our solution-based gold coating strategy offers the benefit of conformal coating of nanowires onto three-dimensional microstructured elastomeric substrates under ambient conditions, indicating promising applications in next-generation wearable biodiagnostics.
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Affiliation(s)
- Bowen Zhu
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Yunzhi Ling
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Lim Wei Yap
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Mingjie Yang
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Fenge Lin
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Shu Gong
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Yan Wang
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Tiance An
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Yunmeng Zhao
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
| | - Wenlong Cheng
- Department of Chemical Engineering, Faculty of Engineering , Monash University , Clayton 3800 , Victoria , Australia
- The Melbourne Centre for Nanofabrication , 151 Wellington Road , Clayton 3168 , Victoria , Australia
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Liu Z, Wang H, Huang P, Huang J, Zhang Y, Wang Y, Yu M, Chen S, Qi D, Wang T, Jiang Y, Chen G, Hu G, Li W, Yu J, Luo Y, Loh XJ, Liedberg B, Li G, Chen X. Highly Stable and Stretchable Conductive Films through Thermal-Radiation-Assisted Metal Encapsulation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1901360. [PMID: 31282042 DOI: 10.1002/adma.201901360] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/21/2019] [Indexed: 06/09/2023]
Abstract
Stretchable conductors are the basic units of advanced flexible electronic devices, such as skin-like sensors, stretchable batteries and soft actuators. Current fabrication strategies are mainly focused on the stretchability of the conductor with less emphasis on the huge mismatch of the conductive material and polymeric substrate, which results in stability issues during long-term use. Thermal-radiation-assisted metal encapsulation is reported to construct an interlocking layer between polydimethylsiloxane (PDMS) and gold by employing a semipolymerized PDMS substrate to encapsulate the gold clusters/atoms during thermal deposition. The stability of the stretchable conductor is significantly enhanced based on the interlocking effect of metal and polymer, with high interfacial adhesion (>2 MPa) and cyclic stability (>10 000 cycles). Also, the conductor exhibits superior properties such as high stretchability (>130%) and large active surface area (>5:1 effective surface area/geometrical area). It is noted that this method can be easily used to fabricate such a stretchable conductor in a wafer-scale format through a one-step process. As a proof of concept, both long-term implantation in an animal model to monitor intramuscular electric signals and on human skin for detection of biosignals are demonstrated. This design approach brings about a new perspective on the exploration of stretchable conductors for biomedical applications.
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Affiliation(s)
- Zhiyuan Liu
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hui Wang
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
- Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Pingao Huang
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
- Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Jianping Huang
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Yu Zhang
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Yuanyuan Wang
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Mei Yu
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Shixiong Chen
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Dianpeng Qi
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Ting Wang
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Ying Jiang
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Geng Chen
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Guoyu Hu
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wenlong Li
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jiancan Yu
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yifei Luo
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Bo Liedberg
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Guanglin Li
- CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences (CAS), Shenzhen, 518055, China
| | - Xiaodong Chen
- Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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A Wrinkled Ag/CNTs-PDMS Composite Film for a High-Performance Flexible Sensor and Its Applications in Human-Body Single Monitoring. NANOMATERIALS 2019; 9:nano9060850. [PMID: 31163693 PMCID: PMC6630618 DOI: 10.3390/nano9060850] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 05/26/2019] [Accepted: 05/27/2019] [Indexed: 01/15/2023]
Abstract
In this paper, a flexible Ag/CNTs-PDMS (polydimethylsi-loxane) composite film sensor based on the novel design philosophy was prepared. Its force-electric effect mechanism is based on the generation of micro-cracks in the Ag film during external forcing, leading to resistance variation. Experimental results find that Ag film thickness has a strong influence on the sensor's sensitivity, which exhibits a tendency of first increasing and then decreasing the Ag film thickness, and also has an optimal thickness of 4.9 μm for the maximum sensitivity around 30. The sensitive mechanism can be theoretically explained by using the quantum tunneling effect. Due to the use of the wrinkled carbon nanotubes (CNTs) film, this sensor has advantages, such as high sensitivity, large strain range, good stability and durability, cheap price, and suitability for large-scale production. Preliminary applications on human-body monitoring reveal that the sensor can detect weak tremors and breathe depth and rate, and the corresponding heartbeat response. It provides possibilities to diagnose early Parkinson's disease and exploit an early warning system for sudden infant death syndrome and sleep apnea in adults. In addition, as a force-electric effect sensor, it is expected to have broad application areas, such as a man-machine cooperation, and a robotic system.
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43
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Han Z, Cheng Z, Chen Y, Li B, Liang Z, Li H, Ma Y, Feng X. Fabrication of highly pressure-sensitive, hydrophobic, and flexible 3D carbon nanofiber networks by electrospinning for human physiological signal monitoring. NANOSCALE 2019; 11:5942-5950. [PMID: 30662990 DOI: 10.1039/c8nr08341j] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Three-dimensional (3D) porous nanostructure materials have promising applications in pressure sensors or other situations. However, the low sensing sensitivity of these materials restricts precise detection of physiological signals, and it is still a challenge to manufacture highly pressure-sensitive materials, which simultaneously possess other versatile properties. Herein, a simple and cost-efficient strategy is proposed to fabricate versatile 3D carbon nanofiber networks (CNFNs) with superior pressure-sensitivity through electrospinning and thermal treatment. The pressure sensitivity of the CNFNs is 1.41 kPa-1, which is much higher than that of similar 3D porous materials. Unlike traditional carbonaceous materials, the CNFNs exhibit excellent flexibility, stable resilience, and super compressibility (>95%), because of the nano-reinforce of Al2O3. Benefiting from the robust mechanical and piezoresistive properties of the CNFNs, a pressure sensor designed with the CNFNs is able to monitor human physiological signals, such as phonation, pulse, respiration and human activities. An arch-array platform for direction identification of tangential forces and an artificial electronic skin bioinspired by human's hairy skin have been ingeniously designed. The CNFNs also present other versatile characteristics as well, including ultralight density, hydrophobicity, low thermal conductivity, and low infrared emissivity. Therefore, the CNFNs have promising potential in a wide range of applications.
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Affiliation(s)
- Zhiyuan Han
- AML, Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China.
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44
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Hou C, Xu Z, Qiu W, Wu R, Wang Y, Xu Q, Liu XY, Guo W. A Biodegradable and Stretchable Protein-Based Sensor as Artificial Electronic Skin for Human Motion Detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805084. [PMID: 30690886 DOI: 10.1002/smll.201805084] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/06/2019] [Indexed: 05/21/2023]
Abstract
Due to the natural biodegradability and biocompatibility, silk fibroin (SF) is one of the ideal platforms for on-skin and implantable electronic devices. However, the development of SF-based electronics is still at a preliminary stage due to the SF film intrinsic brittleness as well as the solubility in water, which prevent the fabrication of SF-based electronics through traditional techniques. In this article, a flexible and stretchable silver nanofibers (Ag NFs)/SF based electrode is synthesized through water-free procedures, which demonstrates outstanding performance, i.e., low sheet resistance (10.5 Ω sq-1 ), high transmittance (>90%), excellent stability even after bending cycles >2200 times, and good extensibility (>60% stretching). In addition, on the basis of such advanced (Ag NFs)/SF electrode, a flexible and tactile sensor is further fabricated, which can simultaneously detect pressure and strain signals with a large monitoring window (35 Pa-700 kPa). Besides, this sensor is air-permeable and inflammation-free, so that it can be directly laminated onto human skins for long-term health monitoring. Considering the biodegradable and skin-comfortable features, this sensor may become promising to find potential applications in on-skin or implantable health-monitoring devices.
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Affiliation(s)
- Chen Hou
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Zijie Xu
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Wu Qiu
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Ronghui Wu
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Yanan Wang
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Qingchi Xu
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Xiang Yang Liu
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
- Department of Physics, Faculty of Science, National University of Singapore, Singapore, 117542, Singapore
| | - Wenxi Guo
- Research Institute for Biomimetics and Soft Matter, College of Materials, College of Physical Science and Technology, Xiamen University, Xiamen, 361005, China
- Shenzhen Research Institute, Xiamen University, Shenzhen, 518057, P. R. China
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45
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Fog-Computing-Based Heartbeat Detection and Arrhythmia Classification Using Machine Learning. ALGORITHMS 2019. [DOI: 10.3390/a12020032] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Designing advanced health monitoring systems is still an active research topic. Wearable and remote monitoring devices enable monitoring of physiological and clinical parameters (heart rate, respiration rate, temperature, etc.) and analysis using cloud-centric machine-learning applications and decision-support systems to predict critical clinical states. This paper moves from a totally cloud-centric concept to a more distributed one, by transferring sensor data processing and analysis tasks to the edges of the network. The resulting solution enables the analysis and interpretation of sensor-data traces within the wearable device to provide actionable alerts without any dependence on cloud services. In this paper, we use a supervised-learning approach to detect heartbeats and classify arrhythmias. The system uses a window-based feature definition that is suitable for execution within an asymmetric multicore embedded processor that provides a dedicated core for hardware assisted pattern matching. We evaluate the performance of the system in comparison with various existing approaches, in terms of achieved accuracy in the detection of abnormal events. The results show that the proposed embedded system achieves a high detection rate that in some cases matches the accuracy of the state-of-the-art algorithms executed in standard processors.
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46
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Liao X, Wang W, Wang L, Tang K, Zheng Y. Controllably Enhancing Stretchability of Highly Sensitive Fiber-Based Strain Sensors for Intelligent Monitoring. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2431-2440. [PMID: 30575372 DOI: 10.1021/acsami.8b20245] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Functional strain sensing is essential to develop health monitoring and Internet of Things. The performance of either narrow sensing range or low sensitivity restricts strain sensors in a wider range of future applications. Attaining both high sensitivity and wide sensing range of a strain sensor remains challenging. Herein, a cluster-type microstructures strategy is proposed for engineering high stretchability of highly sensitive strain sensor. The resistance change of the strain sensor is determined by the deformation of the cluster-type microstructures from close arrangement to orderly interval state during being stretched. Because of the unique geometric structure and conductive connection type of the sensing material, the strain sensor achieves a considerable performance that features both high sensitivity (gauge factor up to 2700) and high stretchability (sensing range of 160% strain). Fast response time and long-term stability are other characteristics of the strain sensor. Monitoring of multiple limb joints and controlling of audible and visual devices are demonstrated as the proof-of-concept abilities of the strain sensor. This study not only puts forward a novel design thought of strain sensor but also offers considerable insights into its potential value toward burgeoning fields including but not limited to real-time health monitoring and intelligent controls.
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Affiliation(s)
- Xinqin Liao
- School of Electrical and Electronic Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Wensong Wang
- School of Electrical and Electronic Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Liang Wang
- Department of Mechanical and Aerospace Engineering , University of Miami , Coral Gables , Florida 33124 , United States
| | - Kai Tang
- School of Electrical and Electronic Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Yuanjin Zheng
- School of Electrical and Electronic Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
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Wang T, Qi D, Yang H, Liu Z, Wang M, Leow WR, Chen G, Yu J, He K, Cheng H, Wu YL, Zhang H, Chen X. Tactile Chemomechanical Transduction Based on an Elastic Microstructured Array to Enhance the Sensitivity of Portable Biosensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1803883. [PMID: 30334282 DOI: 10.1002/adma.201803883] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/23/2018] [Indexed: 02/05/2023]
Abstract
Tactile sensors capable of perceiving biophysical signals such as force, pressure, or strain have attracted extensive interest for versatile applications in electronic skin, noninvasive healthcare, and biomimetic prostheses. Despite these great achievements, they are still incapable of detecting bio/chemical signals that provide even more meaningful and precise health information due to the lack of efficient transduction principles. Herein, a tactile chemomechanical transduction strategy that enables the tactile sensor to perceive bio/chemical signals is proposed. In this methodology, pyramidal tactile sensors are linked with biomarker-induced gas-producing reactions, which transduce biomarker signals to electrical signals in real time. The method is advantageous as it enhances electrical signals by more than tenfold based on a triple-step signal amplification strategy, as compared to traditional electrical biosensors. It also constitutes a portable and general platform capable of quantifying a wide spectrum of targets including carcinoembryonic antigen, interferon-γ, and adenosine. Such tactile chemomechanical transduction would greatly broaden the application of tactile sensors toward bio/chemical signals perception which can be used in ultrasensitive portable biosensors and chemical-responsive chemomechanical systems.
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Affiliation(s)
- Ting Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education; Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics; College of Optoelectronic Engineering; Shenzhen University; 3688 Nanhai Avenue Shenzhen Guangdong 518060 China
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Dianpeng Qi
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Hui Yang
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Zhiyuan Liu
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Ming Wang
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Wan Ru Leow
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Geng Chen
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Jiancan Yu
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Ke He
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| | - Hongwei Cheng
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology; School of Pharmaceutical Sciences; Xiamen University; Xiamen 361102 P. R. China
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology; School of Pharmaceutical Sciences; Xiamen University; Xiamen 361102 P. R. China
| | - Han Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education; Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics; College of Optoelectronic Engineering; Shenzhen University; 3688 Nanhai Avenue Shenzhen Guangdong 518060 China
| | - Xiaodong Chen
- Innovative Center for Flexible Devices (iFLEX); School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
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Ma Z, Li S, Wang H, Cheng W, Li Y, Pan L, Shi Y. Advanced electronic skin devices for healthcare applications. J Mater Chem B 2018; 7:173-197. [PMID: 32254546 DOI: 10.1039/c8tb02862a] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Electronic skin, a kind of flexible electronic device and system inspired by human skin, has emerged as a promising candidate for wearable personal healthcare applications. Wearable electronic devices with skin-like properties will provide platforms for continuous and real-time monitoring of human physiological signals such as tissue pressure, body motion, temperature, metabolites, electrolyte balance, and disease-related biomarkers. Transdermal drug delivery devices can also be integrated into electronic skin to enhance its non-invasive, real-time dynamic therapy functions. This review summarizes the recent progress in electronic skin devices for applications in human health monitoring and therapy systems as well as several potential mass production technologies such as inkjet printing and 3D printing. The opportunities and challenges in broadening the applications of electronic skin devices in practical healthcare are also discussed.
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Affiliation(s)
- Zhong Ma
- Collaborative Innovation Center of Advanced Microstructures, Jiangsu Provincial Key Laboratory of Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University, 210093 Nanjing, China.
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Soto F, Jeerapan I, Silva-López C, Lopez-Ramirez MA, Chai I, Xiaolong L, Lv J, Kurniawan JF, Martin I, Chakravarthy K, Wang J. Noninvasive Transdermal Delivery System of Lidocaine Using an Acoustic Droplet-Vaporization Based Wearable Patch. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803266. [PMID: 30369022 DOI: 10.1002/smll.201803266] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/04/2018] [Indexed: 05/19/2023]
Abstract
Current technologies for managing acute and chronic pain have focused on reducing the time required for achieving high therapeutic efficiency. Herein a wearable transdermal patch is introduced, employing an acoustic droplet vaporization (ADV) methodology, as an effective noninvasive transdermal platform, for a fast local delivery of the anesthetic agent lidocaine. The skin-worn patch consists of a flexible drug reservoir containing hundreds of micropores loaded with lidocaine, and mixed with the perfluorocarbon (PFC) emulsion. The ultrasound-triggered vaporization of the PFC emulsion provides the necessary force to breach dermal barriers. The drug release kinetics of our model was investigated by measuring the amount of lidocaine that passed through phantom tissue and pigskin barriers. The ADV platform increases the payload skin penetration resulting in shorter treatment times compared to passive diffusion or ultrasound alone, holding considerable promise for addressing the delayed therapeutic action and slow pain relief of existing delivery protocols. It is envisioned that the integration of ADV-based transdermal devices could be expanded to the depth-dependent delivery of other pain management, vaccines, and gene therapy modalities.
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Affiliation(s)
- Fernando Soto
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Itthipon Jeerapan
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Cristian Silva-López
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | | | - Ingrid Chai
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Lu Xiaolong
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
| | - Jian Lv
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jonas F Kurniawan
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Ian Martin
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Krishnan Chakravarthy
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
- Department of Anesthesiology and Pain Medicine, University of California San Diego Health Sciences, San Diego, La Jolla, CA, 92093, USA
| | - Joseph Wang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
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Cao C, Chu Y, Zhou Y, Zhang C, Qu S. Recent Advances in Stretchable Supercapacitors Enabled by Low-Dimensional Nanomaterials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1803976. [PMID: 30450784 DOI: 10.1002/smll.201803976] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/01/2018] [Indexed: 06/09/2023]
Abstract
Supercapacitors (SCs) have shown great potential for mobile energy storage technology owing to their long-term durability, electrochemical stability, structural simplicity, as well as exceptional power density without much compromise in the energy density and cycle life parameters. As a result, stretchable SC devices have been incorporated in a variety of emerging electronics applications ranging from wearable electronic textiles to microrobots to integrated energy systems. In this review, the recent progress and achievements in the field of stretchable SCs enabled by low-dimensional nanomaterials such as polypyrrole, carbon nanotubes, and graphene are presented. First, the three major categories of stretchable supercapacitors are discussed: double-layer supercapacitors, pseudo-supercapacitors, and hybrid supercapacitors. Then, the representative progress in developing stretchable electrodes with low-dimensional (0D, 1D, and 2D) nanomaterials is described. Next, the design strategies enabling the stretchability of the devices, including the wavy-shape design, wire-shape design, textile-shape design, kirigami-shape design, origami-shape design, and serpentine bridge-island design are emphasized, with the aim of improving the electrochemical performance under the complex stretchability conditions that may be encountered in practical applications. Finally, the newest developments, major challenges, and outlook in the field of stretchable SC development and manufacturing are discussed.
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Affiliation(s)
- Changyong Cao
- Laboratory for Soft Machines & Electronics, School of Packaging, Michigan State University, East Lansing, MI, 48824, USA
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Yihang Chu
- Laboratory for Soft Machines & Electronics, School of Packaging, Michigan State University, East Lansing, MI, 48824, USA
- Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Yihao Zhou
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Chi Zhang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
| | - Shaoxing Qu
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
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