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Wearable strain sensor for real-time sweat volume monitoring

Lirong Wang, Tailin Xu, Chuan Fan, Xueji Zhang
2020 iScience  
Such sensor combing swellable hydrogels with strain sensing fabrics provides a novel measurement method of wearable devices for sweat volume monitoring.  ...  Here, we present the first example of wearable strain sensor for real-time sweat volume monitoring.  ...  The design and results of the wearable strain sensor in vivo Finally, the wearable strain sensor was used for on-body analysis of sweat volume to demonstrate its feasibility for health monitoring applications  ... 
doi:10.1016/j.isci.2020.102028 pmid:33490926 pmcid:PMC7809499 fatcat:6qzfkc44urdxlbvc43lnjule2q

Laser-induced graphene for bioelectronics and soft actuators

Yadong Xu, Qihui Fei, Margaret Page, Ganggang Zhao, Yun Ling, Dick Chen, Zheng Yan
2021 Nano Reseach  
., polymers, wood, food, textiles) in a programmed manner at ambient conditions.  ...  Next, we overview the recent studies of LIG-based biophysical (e.g., strain, pressure, temperature, hydration, humidity, electrophysiological) sensors and biochemical (e.g., gases, electrolytes, metabolites  ...  For example, the LIG decorated with MoS2 [64] or embedded in soft medical-grade PU [65] , and SiC-LIG composite [39, 40] were explored for strain sensing.  ... 
doi:10.1007/s12274-021-3441-9 pmid:33841746 pmcid:PMC8023525 fatcat:27aed2m2mregxi5fffa2ay2wpi

Wearable Sweat Loss Measuring Devices: From the Role of Sweat Loss to Advanced Mechanisms and Designs

Bowen Zhong, Kai Jiang, Lili Wang, Guozhen Shen
2021 Advanced Science  
Finally, concluding remarks on opportunities for future application fields and challenges for future sweat sensing are presented.  ...  This paper reviews wearable SLMDs with a new health perspective from the role of sweat loss to advanced mechanisms and designs.  ...  A more feasible textile-based SLMD for microfluidic applications was demonstrated by Francis et al. based on a similar operating mechanism.  ... 
doi:10.1002/advs.202103257 pmid:34713981 pmcid:PMC8728835 fatcat:2t2h5rxfpfcsfkvpcbg62jupja

Smart Materials for Wearable Healthcare Devices [chapter]

Han Jin, Qinghui Jin, Jiawen Jian
2018 Wearable Technologies  
A complementary section of the review linking these advanced materials with wearable device technologies is particularly specified.  ...  With continued innovation and intensive attention to the materials and fabrication technologies, development of these healthcare devices is progressively encouraged.  ...  Compared with piezoresistive-and piezocapacitive-based strain sensors, strain devices comprised of piezoelectric materials have greater dynamic durability.  ... 
doi:10.5772/intechopen.76604 fatcat:nabzt3qno5dqlg66lcfnjpgdva

Body-Monitoring and Health Supervision by Means of Optical Fiber-Based Sensing Systems in Medical Textiles

Brit M. Quandt, Lukas J. Scherer, Luciano F. Boesel, Martin Wolf, Gian-Luca Bona, René M. Rossi
2014 Advanced Healthcare Materials  
Optical fiber-based sensors that were already used in first trials were primarily selected for the section on possible applications.  ...  The implementation of these sensor concepts prompts the development of wearable smart textiles.  ...  With these, homogeneous textiles with integrated sensors are feasible.  ... 
doi:10.1002/adhm.201400463 pmid:25358557 fatcat:c7frcmrutfckpong7t2zabfjvu

E-Skin: The Dawn of a New Era of On-Body Monitoring Systems

Alina-Cristina Bunea, Violeta Dediu, Edwin Alexandru Laszlo, Florian Pistriţu, Mihaela Carp, Florina Silvia Iliescu, Octavian Narcis Ionescu, Ciprian Iliescu
2021 Micromachines  
Firstly, we revised the material development for e-skin systems. Secondly, aspects related to fabrication techniques were presented.  ...  The special features of e-skin as identified contribute clearly to the developing potential as in situ diagnostic tool for further implementation in clinical practice at patient personal levels.  ...  The in vivo test (compared with a glucometer) showed a maximum error of about 3%.  ... 
doi:10.3390/mi12091091 pmid:34577734 fatcat:vlube5dtt5fvlcjomattxinhli

Recent Advances in Electronic Skins with Multiple-Stimuli-Responsive and Self-Healing Abilities

Quanquan Guo, Xiaoyan Qiu, Xinxing Zhang
2022 Materials  
Wearable electronic skin (e-skin) has provided a revolutionized way to intelligently sense environmental stimuli, which shows prospective applications in health monitoring, artificial intelligence and  ...  We believe that this review will provide valuable guidance for readers to fabricate superior e-skin materials or devices with skin-like multifunctionalities and disparate characteristics.  ...  For example, wang and coworkers fabricated a stretchable textile-based multi-ion potentiometric sensor using ion-selective membranes to selectively measure Na + and K + with a wide detection range (Figure  ... 
doi:10.3390/ma15051661 pmid:35268894 pmcid:PMC8911295 fatcat:5punnkqc2reo3ekuuhjjqpdbma

Piezoresistive Sensing Approaches for Structural Health Monitoring of Polymer Composites—A Review

Saad Nauman
2021 Eng—Advances in Engineering  
A selection criterion for these techniques is also presented based on sensitivity, manufacturing method and detection capability.  ...  Among other properties, piezoresistance is the one that can be detected in composites in real-time as a function of strain.  ...  also been put forth [83] but there is a need to conduct a detailed literature review on the Piezoresistive sensing approaches for SHM of composites with a view of conducting a comparative analysis of  ... 
doi:10.3390/eng2020013 fatcat:74ldyym2l5g7bmcewcmif2otbi

Role of mechanical factors in applications of stimuli-responsive polymer gels – Status and prospects

Alexander V. Goponenko, Yuris A. Dzenis
2016 Polymer  
chemical tailorability, stimuli responsive gels represent a versatile and very promising class of materials for sensors, muscle-type actuators, biomedical applications, and autonomous intelligent structures  ...  A short account of mechanisms of gel swelling and mechanical characteristics of importance to stimuli-responsive gels is presented.  ...  In general however, the profile of swelling vs. time may differ significantly from one gel system to another thus requiring analysis of the complete time profile of swelling in order to compare the speed  ... 
doi:10.1016/j.polymer.2016.08.068 pmid:28348443 pmcid:PMC5365095 fatcat:zx3jtenr45celioo7hganxewwq

High-Adhesive Flexible Electrodes and Their Manufacture: A Review

Yingying Xiao, Mengzhu Wang, Ye Li, Zhicheng Sun, Zilong Liu, Liang He, Ruping Liu
2021 Micromachines  
Among these technologies, adhesion and stretchable electrode technology is a key component for the rapid development of high-performance sensors.  ...  All human activity is associated with the generation of electrical signals.  ...  For capture and analysis of EP signals, electrodes are essential components, which are composed of base, interface, and packaging materials.  ... 
doi:10.3390/mi12121505 pmid:34945355 pmcid:PMC8704330 fatcat:2riqmn3h4jdc5mjybvi2j6ztim

Chromism-Integrated Sensors and Devices for Visual Indicators

Hyunho Seok, Sihoon Son, Jinill Cho, Sanghwan Choi, Kihong Park, Changmin Kim, Nari Jeon, Taesung Kim, Hyeong-U Kim
2022 Sensors  
This operation mechanism can be integrated with various sensors (pressure, strain, biomolecules, gas, etc.) and devices (energy conversion/storage systems) as visual indicators for user-friendly operation  ...  For example, one of the representative chromism electrochromic materials exhibits optical modulation under ion insertion/extraction by applying a potential.  ...  In the aspect of chromic sensors, multi-stimuli sensors adopt materials with different chromic phenomena, such as thermochromism for temperature sensing, mechanochromism for strain sensing, photochromism  ... 
doi:10.3390/s22114288 pmid:35684910 fatcat:vrcejqmkejbrdntfq5wbb2fuiu

Smart Contact Lenses for Biosensing Applications

Xin Ma, Samad Ahadian, Song Liu, Jingwen Zhang, Shengnan Liu, Teng Cao, Wenbin Lin, Dong Wu, Natan Roberto de Barros, Mohammad Reza Zare, Sibel Emir Diltemiz, Vadim Jucaud (+8 others)
2021 Advanced Intelligent Systems  
Acknowledgements This work was supported by a grant from CooperVision, Inc., to Department of Bioengineering at the University of California, Los Angeles, and Terasaki Institute for Biomedical Innovation  ...  W. acknowledge the School of Computer Science and Technology, School of Textile Science and Engineering at Tiangong University in China, and China Scholarship Council.  ...  [9] There are four basic types of contact lens sensors for IOP monitoring: capacitance sensor, piezoresistive sensor, strain gauge sensor, and microinductor sensor.  ... 
doi:10.1002/aisy.202000263 fatcat:ifpn6g2l3ncjffw7rxdb3uayja

Flexible Wireless Passive LC Pressure Sensor with Design Methodology and Cost-Effective Preparation

Zhuqi Sun, Haoyu Fang, Baochun Xu, Lina Yang, Haoran Niu, Hongfei Wang, Da Chen, Yijian Liu, Zhuopeng Wang, Yanyan Wang, Qiuquan Guo
2021 Micromachines  
In the LC sensing system, the metal rings, as the traditional readout device, are difficult to meet the needs of the portable readout device for the integrated and planar readout antenna.  ...  The experimental results show that resonant frequency decreases linearly with the increase of applied pressure in a range of 0–23,760 Pa with a high sensitivity of −2.2 MHz/KPa.  ...  We thank Zhuqi, Sun, Haoyu Fang, and Baochun Xu for their experimental work for this article.  ... 
doi:10.3390/mi12080976 fatcat:qlfh2uckb5cavlnxjzn6zga4oe

A Review of Recent Advances in Flexible Wearable Sensors for Wound Detection Based on Optical and Electrical Sensing

Xianyou Sun, Yanchi Zhang, Chiyu Ma, Qunchen Yuan, Xinyi Wang, Hao Wan, Ping Wang
2021 Biosensors  
This paper provides a comprehensive overview for researchers in the development of flexible wearable sensors for wound detection.  ...  With advances in materials science and smart sensing technology, flexible wearable sensors for wound condition assessment have been developed that can accurately detect physiological markers in wounds  ...  by flexible wearable sensors (Figure 1 ) based on optical and electrical sensing.  ... 
doi:10.3390/bios12010010 pmid:35049637 pmcid:PMC8773881 fatcat:5vol7iqrkzcprd7sigdw4lfdai

Integrating Ionic Electroactive Polymer Actuators and Sensors Into Adaptive Building Skins – Potentials and Limitations

Raphael Neuhaus, Nima Zahiri, Jan Petrs, Yasaman Tahouni, Jörg Siegert, Ivica Kolaric, Hanaa Dahy, Thomas Bauernhansl
2020 Frontiers in Built Environment  
small actuated apertures into a fabric membrane, and second, as flexible, energy-and cost-efficient distributed sensors for external load monitoring of such structures.  ...  These devices have attracted high interest from industry and academia due to their small actuation voltages, relatively large actuation and sensing responses and their flexible and soft mechanical characteristics  ...  A special thanks goes to the Fraunhofer Institute for Manufacturing Engineering and Automation IPA for providing parts of the necessary manufacturing and measurement equipment needed to build and characterize  ... 
doi:10.3389/fbuil.2020.00095 fatcat:qgx34ypulnez7dpsm2nsxyxide
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