scholarly journals Correction: Hydrogels from natural egg white with extraordinary stretchability, direct-writing 3D printability and self-healing for fabrication of electronic sensors and actuators

2019 ◽  
Vol 7 (42) ◽  
pp. 24641-24641
Author(s):  
Qiang Chang ◽  
Mohammad Ali Darabi ◽  
Yuqing Liu ◽  
Yunfan He ◽  
Wen Zhong ◽  
...  
Keyword(s):  
Egg White ◽  
Self Healing ◽  
Direct Writing ◽  
Sensors And Actuators ◽  
Electronic Sensors

Correction for ‘Hydrogels from natural egg white with extraordinary stretchability, direct-writing 3D printability and self-healing for fabrication of electronic sensors and actuators’ by Qiang Chang et al., J. Mater. Chem. A, 2019, DOI: 10.1039/c9ta06233e.

Hydrogels from natural egg white with extraordinary stretchability, direct-writing 3D printability and self-healing for fabrication of electronic sensors and actuators

2019 ◽  
Vol 7 (42) ◽  
pp. 24626-24640 ◽  
Author(s):  
Qiang Chang ◽  
Mohammad Ali Darabi ◽  
Yuqing Liu ◽  
Yunfan He ◽  
Wen Zhong ◽  
...  
Keyword(s):  
Egg White ◽  
Self Healing ◽  
Direct Writing ◽  
Sensors And Actuators ◽  
Electronic Sensor ◽  
Highly Sensitive ◽  
Electronic Sensors

An alkali-induced egg white hydrogel achieved ultra-stretchability, self-healing and direct 3D printability for highly sensitive electronic sensor and humidity-responsive actuator fabrication.

Ultra elastic, stretchable, self-healing conductive hydrogels with tunable optical properties for highly sensitive soft electronic sensors

2020 ◽  
Vol 8 (46) ◽  
pp. 24718-24733
Author(s):  
Meng Wu ◽  
Jingsi Chen ◽  
Yuhao Ma ◽  
Bin Yan ◽  
Mingfei Pan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Human Activities ◽  
Ionic Conductor ◽  
Self Healing ◽  
Dynamic Covalent Chemistry ◽  
Highly Sensitive ◽  
Tunable Optical Properties ◽  
Conductive Hydrogels ◽  
Electronic Sensors

A self-healing hydrogel ionic conductor has been developed by combining dynamic covalent chemistry with nanofiller reinforcement and micelle crosslinking, and used for sensing of diverse human activities.

scholarly journals A LoRaWAN Testbed Design for Supporting Critical Situations: Prototype and Evaluation

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Jorge Navarro-Ortiz ◽  
Juan J. Ramos-Munoz ◽  
Juan M. Lopez-Soler ◽  
Cristina Cervello-Pastor ◽  
Marisa Catalan
Keyword(s):  
Network Architecture ◽  
Battery Life ◽  
Proper Solution ◽  
Self Healing ◽  
Core Network ◽  
Sensors And Actuators ◽  
Massive Number ◽  
Emergency Scenarios ◽  
Load Balancer ◽  
Critical Situations

The Internet of Things is one of the hottest topics in communications today, with current revenues of $151B, around 7 billion connected devices, and an unprecedented growth expected for next years. A massive number of sensors and actuators are expected to emerge, requiring new wireless technologies that can extend their battery life and can cover large areas. LoRaWAN is one of the most outstanding technologies which fulfill these demands, attracting the attention of both academia and industry. In this paper, the design of a LoRaWAN testbed to support critical situations, such as emergency scenarios or natural disasters, is proposed. This self-healing LoRaWAN network architecture will provide resilience when part of the equipment in the core network may become faulty. This resilience is achieved by virtualizing and properly orchestrating the different network entities. Different options have been designed and implemented as real prototypes. Based on our performance evaluation, we claim that the usage of microservice orchestration with several replicas of the LoRaWAN network entities and a load balancer produces an almost seamless recovery which makes it a proper solution to recover after a system crash caused by any catastrophic event.

scholarly journals Light-Written Reversible 3D Fluorescence and Topography Dual-Pattern with Memory and Self-Healing Abilities

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Jing Bai ◽  
Luzhi Zhang ◽  
Honghao Hou ◽  
Zixing Shi ◽  
Jie Yin ◽  
...  
Keyword(s):  
Polymer System ◽  
Smart Devices ◽  
Cross Linking ◽  
Self Healing ◽  
Complex Topography ◽  
Direct Writing ◽  
Naphthalene Diimide ◽  
Gradient Change ◽  
With Memory ◽  
Effect Of Light

To achieve the dynamical dual-pattern with multiplex information of complex topography and 3D fluorescence is challenging yet promising for wide applications ranging from visual bioassays, memory, smart devices to smart display. Here, we develop a convenient, reliable, and versatile method to realize the well-ordered dual-pattern with reversible topography and 3D fluorescence via a light direct-writing approach based on the wrinkle mechanism. By introducing the charge transfer (CT) interaction between π-electron-rich anthracene (AN) and π-electron-poor naphthalene diimide (NDI) into the polymer system, both modulus and fluorescence of the polymer films can be spatially regulated through the photodimerization of AN, which is controlled in-plane by photomasks, and becomes gradient in the vertical direction due to the filter effect of light. Therefore, the exposed sample displays a well-ordered complex pattern with the same topography as the applied photomask and 3D gradient change of fluorescence from red to green laterally across the layers simultaneously. The spatial cross-linking and CT interaction of the gradient layer can be controlled independently, which not only provides the reliability and reversibility of the topographical and fluorescence dual-pattern but also endows the possibility for tailoring the pattern with memory and self-healing. These characters of the dual-pattern with reversible topography and 3D fluorescence declare the clear applications in smart multiplex displays, memory, anticounterfeiting, visual detections, and so on.

Application of super-stretched self-healing elastomer based on methyl vinyl silicone rubber for wearable electronic sensors

2021 ◽  
Author(s):  
Tianwen Yu ◽  
Yifei Shan ◽  
Zhixi Li ◽  
Xiaoxiao Wang ◽  
Hua‘nan Cui ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Wearable Sensors ◽  
Electronic Devices ◽  
Self Healing ◽  
Relevant Research ◽  
Methyl Vinyl ◽  
Wearable Electronic ◽  
Low Sensitivity ◽  
Wearable Electronic Devices ◽  
Electronic Sensors

Wearable electronic devices, represented by wearable sensors with self-healing performance, are key to the development of the relevant research. However, problems of sensors as low sensitivity, flexibility, durability and self-healing...

A Prototype of Wireless Networked IoT Based Lighting Control in Open Platform

2020 ◽  
Vol 13 (3) ◽  
pp. 405-416 ◽  
Author(s):  
Sanjeev Kumar T.M ◽  
Ciji P. Kurian ◽  
Susan Varghese ◽  
Anil Upadhyaya ◽  
Anupriya John ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Environmental Benefits ◽  
Mesh Network ◽  
Sensor Data ◽  
The Internet ◽  
Self Healing ◽  
Sensors And Actuators ◽  
Lighting Control ◽  
Open Platform ◽  
The Internet Of Things

Background: The lighting researchers are keenly looking for the huge benefits of the internet of things on an open platform which provides the cost gains in addition to other environmental benefits. Connected systems interact with the software and analyse real-time building conditions, and feed information into the building controls network. Methods: This paper presents a wireless networked system for lighting control in buildings which connect the power of the Internet of Things. After analysing the ZigBee network on QualNet v7.4, a Digi Mesh network was set up using XBee modules using the XBee Configuration and Test Utility [XCTU] Software v6.3.11. The ThingSpeak cloud platform along with MATLAB 2017b provides the necessary cloud support to enable this network to communicate over the internet. The results indicate that the XBee S2C module functioning in the API mode when flashed with the DigiMesh firmware offers the best option for forming a self-healing mesh network. An aggregator node acts as an information sink and collects the sensor data from all the sensor nodes and passes it on to the cloud via the Raspberry gateway. Results: The algorithm on the cloud can read this sensor data and compute the necessary Pulse Width Modulation [PWM] signals required to control the brightness of a dimmable LED luminaire. The system also takes into consideration the zone-wise occupancy in the room while computing the PWM values to be sent to the luminaires. Conclusion: The use of the concept of open platform sensors and actuators is the significance of the work.

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