Flexible pressure sensors capable of monitoring diverse physiological signals and body movements have garnered tremendous attention in wearable electronic devices.Thereinto,high constant sensitivity over a wide pressu...Flexible pressure sensors capable of monitoring diverse physiological signals and body movements have garnered tremendous attention in wearable electronic devices.Thereinto,high constant sensitivity over a wide pressure range combined with breathability,biocompatibility,biodegradability is pivotal for manufacturing of reliable pressure sensors in practical sensing applications.In this work,inspired by the multilayered structure of skin epidermis,we propose and demonstrate a multi-attribute wearable piezoresistive pressure sensor consisting of multilayered gradient conductive poly(ε-caprolactone)nanofiber membranes composites.In response to externally applied pressure,a layer-by-layer current path is activated inside the multilayered membranes composites,leading to the most salient sensing performance of high constant sensitivity of 33.955 kPa^(−1) within the pressure range of 0–80 kPa.The proposed pressure sensor also exhibits a fast response–relaxation time,a low detection limit,excellent stability,which can be successfully used to measure human physiological signals.Lastly,an integrated sensor array system that can locate objects’positions is constructed and applied to simulate sitting posture monitoring.These results indicate that the proposed pressure sensor holds great potential in health monitoring and wearable electronic devices.展开更多
Soft and stretchable electronics have garnered significant attention in various fields, such as wearable electronics, electronic skins, and soft robotics. However, current wearable electronics made from materials like...Soft and stretchable electronics have garnered significant attention in various fields, such as wearable electronics, electronic skins, and soft robotics. However, current wearable electronics made from materials like conductive elastomers, hydrogels, and liquid metals face limitations, including low permeability, poor adhesion, inadequate conductivity, and limited stretchability. These issues hinder their effectiveness in long-term healthcare monitoring and exercise monitoring. To address these challenges,we introduce a novel design of web-droplet-like electronics featuring a semi-liquid metal coating for wearable applications. This innovative design offers high permeability, excellent stretchability, strong adhesion, and good conductivity for the electronic skin. The unique structure, inspired by the architecture of a spider web, significantly enhances air permeability compared to commercial breathable patches.Furthermore, the distribution of polyborosiloxane mimics the adhesive properties of spider web mucus,while the use of semi-liquid metals in this design results in remarkable conductivity(9 × 10^(6)S/m) and tensile performance(up to 850% strain). This advanced electronic skin technology enables long-term monitoring of various physiological parameters and supports machine learning recognition functions with unparalleled advantages. This web-droplet structure design strategy holds great promise for commercial applications in medical health monitoring and disease diagnosis.展开更多
介绍了柔性可穿戴压电超声传感器压电层、背衬层、匹配层、封装层、电极层的结构设计和材料选择,论述了利用有限元分析(Finite Element Analysis,FEA)技术进行柔性可穿戴压电超声传感器模拟设计的优势,阐述了电极图案化等柔性可穿戴压...介绍了柔性可穿戴压电超声传感器压电层、背衬层、匹配层、封装层、电极层的结构设计和材料选择,论述了利用有限元分析(Finite Element Analysis,FEA)技术进行柔性可穿戴压电超声传感器模拟设计的优势,阐述了电极图案化等柔性可穿戴压电超声传感器制造领域中的关键技术,分析了柔性可穿戴压电超声传感器在深层组织成像、血流动力学监测、促进骨损伤恢复、辅助透皮给药等领域的应用情况。展望了柔性可穿戴压电超声传感器的发展方向,指出未来可通过应用高性能信号处理技术、改进超声探测成像算法、优化传感器结构设计方案等手段,进一步提升柔性可穿戴压电超声传感器的测量准确性、使用安全性和集成化程度,促进该类传感器市场化、产业化发展。展开更多
基金the National Natural Science Foundation of China(Nos.62174068 and 61888102)Rizhao City Key Research and Development Program(No.2021ZDYF010102).
文摘Flexible pressure sensors capable of monitoring diverse physiological signals and body movements have garnered tremendous attention in wearable electronic devices.Thereinto,high constant sensitivity over a wide pressure range combined with breathability,biocompatibility,biodegradability is pivotal for manufacturing of reliable pressure sensors in practical sensing applications.In this work,inspired by the multilayered structure of skin epidermis,we propose and demonstrate a multi-attribute wearable piezoresistive pressure sensor consisting of multilayered gradient conductive poly(ε-caprolactone)nanofiber membranes composites.In response to externally applied pressure,a layer-by-layer current path is activated inside the multilayered membranes composites,leading to the most salient sensing performance of high constant sensitivity of 33.955 kPa^(−1) within the pressure range of 0–80 kPa.The proposed pressure sensor also exhibits a fast response–relaxation time,a low detection limit,excellent stability,which can be successfully used to measure human physiological signals.Lastly,an integrated sensor array system that can locate objects’positions is constructed and applied to simulate sitting posture monitoring.These results indicate that the proposed pressure sensor holds great potential in health monitoring and wearable electronic devices.
基金National Natural Science Foundation of China (52301193 and 62304150)。
文摘Soft and stretchable electronics have garnered significant attention in various fields, such as wearable electronics, electronic skins, and soft robotics. However, current wearable electronics made from materials like conductive elastomers, hydrogels, and liquid metals face limitations, including low permeability, poor adhesion, inadequate conductivity, and limited stretchability. These issues hinder their effectiveness in long-term healthcare monitoring and exercise monitoring. To address these challenges,we introduce a novel design of web-droplet-like electronics featuring a semi-liquid metal coating for wearable applications. This innovative design offers high permeability, excellent stretchability, strong adhesion, and good conductivity for the electronic skin. The unique structure, inspired by the architecture of a spider web, significantly enhances air permeability compared to commercial breathable patches.Furthermore, the distribution of polyborosiloxane mimics the adhesive properties of spider web mucus,while the use of semi-liquid metals in this design results in remarkable conductivity(9 × 10^(6)S/m) and tensile performance(up to 850% strain). This advanced electronic skin technology enables long-term monitoring of various physiological parameters and supports machine learning recognition functions with unparalleled advantages. This web-droplet structure design strategy holds great promise for commercial applications in medical health monitoring and disease diagnosis.
文摘介绍了柔性可穿戴压电超声传感器压电层、背衬层、匹配层、封装层、电极层的结构设计和材料选择,论述了利用有限元分析(Finite Element Analysis,FEA)技术进行柔性可穿戴压电超声传感器模拟设计的优势,阐述了电极图案化等柔性可穿戴压电超声传感器制造领域中的关键技术,分析了柔性可穿戴压电超声传感器在深层组织成像、血流动力学监测、促进骨损伤恢复、辅助透皮给药等领域的应用情况。展望了柔性可穿戴压电超声传感器的发展方向,指出未来可通过应用高性能信号处理技术、改进超声探测成像算法、优化传感器结构设计方案等手段,进一步提升柔性可穿戴压电超声传感器的测量准确性、使用安全性和集成化程度,促进该类传感器市场化、产业化发展。
