scholarly journals Optimization of ZnO Nanorods Concentration in a Micro-Structured Polymeric Composite for Nanogenerators

Chemosensors ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 27
Author(s):  
Andreia dos Santos ◽  
Filipe Sabino ◽  
Ana Rovisco ◽  
Pedro Barquinha ◽  
Hugo Águas ◽  
...  
Keyword(s):  
Piezoelectric Coefficient ◽  
Raw Materials ◽  
Electronic Devices ◽  
Zno Nanorods ◽  
Polymeric Composite ◽  
Wearable Devices ◽  
Polymeric Matrices ◽  
Energy Harvesters ◽  
Triboelectric Nanogenerators ◽  
Piezoelectric Nanogenerators

The growing use of wearable devices has been stimulating research efforts in the development of energy harvesters as more portable and practical energy sources alternatives. The field of piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs), especially employing zinc oxide (ZnO) nanowires (NWs), has greatly flourished in recent years. Despite its modest piezoelectric coefficient, ZnO is very attractive due to its sustainable raw materials and the facility to obtain distinct morphologies, which increases its multifunctionality. The integration of ZnO nanostructures into polymeric matrices to overcome their fragility has already been proven to be fruitful, nevertheless, their concentration in the composite should be optimized to maximize the harvesters’ output, an aspect that has not been properly addressed. This work studies a composite with variable concentrations of ZnO nanorods (NRs), grown by microwave radiation assisted hydrothermal synthesis, and polydimethylsiloxane (PDMS). With a 25 wt % ZnO NRs concentration in a composite that was further micro-structured through laser engraving for output enhancement, a nanogenerator (NG) was fabricated with an output of 6 V at a pushing force of 2.3 N. The energy generated by the NG could be stored and later employed to power small electronic devices, ultimately illustrating its potential as an energy harvesting device.

scholarly journals Progress on Self-Powered Wearable and Implantable Systems Driven by Nanogenerators

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 666
Author(s):  
Lanxin Yang ◽  
Zhihao Ma ◽  
Yun Tian ◽  
Bo Meng ◽  
Zhengchun Peng
Keyword(s):  
Mechanical Energy ◽  
Rapid Development ◽  
Electronic Devices ◽  
High Sensitivity ◽  
Self Powered ◽  
Triboelectric Nanogenerators ◽  
The Internet Of Things ◽  
Piezoelectric Nanogenerators

With the rapid development of the internet of things (IoT), sustainable self-powered wireless sensory systems and diverse wearable and implantable electronic devices have surged recently. Under such an opportunity, nanogenerators, which can convert continuous mechanical energy into usable electricity, have been regarded as one of the critical technologies for self-powered systems, based on the high sensitivity, flexibility, and biocompatibility of piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs). In this review, we have thoroughly analyzed the materials and structures of wearable and implantable PENGs and TENGs, aiming to make clear how to tailor a self-power system into specific applications. The advantages in TENG and PENG are taken to effectuate wearable and implantable human-oriented applications, such as self-charging power packages, physiological and kinematic monitoring, in vivo and in vitro healing, and electrical stimulation. This review comprehensively elucidates the recent advances and future outlook regarding the human body’s self-powered systems.

Energy Harvesting Using Galvanically Synthesized Piezoelectric ZnO Nanorods on Flexible Polymer Film

2015 ◽  
Author(s):  
Christopher Oshman ◽  
Julie Chauvin ◽  
Charles Opoku ◽  
Abhishek S. Dahiya ◽  
Daniel Alquier ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Reference Sample ◽  
Electrically Conductive ◽  
Flexible Polymer ◽  
Conductive Surface ◽  
Commercial Market ◽  
Bending Loads ◽  
Pet Film ◽  
Electro Negativity ◽  
Piezoelectric Nanogenerators

This paper reports advancement in bringing flexible piezoelectric nanogenerators (NGs) closer to being realized in a commercial market. We have adopted a method to synthesize piezoelectric ZnO nanorods (NRs) on any electrically conductive surface without a seed layer or a specially selected substrate with matching lattice spacing. By contacting a metal with a dissimilar electro-negativity, a galvanic cell is created in the electrolyte growth medium. We have demonstrated the performance of the as grown NRs on a thin NG using common PET film. The device produced voltages in excess of three times higher than a parallel fabricated reference sample under bending loads.

scholarly journals Bail Financial Sharing (BFS): A Financial Subsystem of Rastin PLS Banking

2019 ◽  
Vol 3 (1) ◽  
pp. 21-27
Author(s):  
Bijan Bidabad
Keyword(s):  
Financial Markets ◽  
Raw Materials ◽  
Electronic Devices ◽  
Banking System ◽  
Base System ◽  
The Future ◽  
Application Methods

To cover producers and consumers against future prices fluctuation risk, depositors can forward-purchase raw materials or products to be delivered at a specified time in the future through Bail Financial Sharing (BFS). Bail Financial Sharing is a subsystem of Rastin Profit and Loss Sharing (PLS) banking system, and in this regard, instructions, organization and application methods, and electronic devices and contracts are similar to the context defined in the Base System of Rastin PLS banking system. Bail Financial Sharing (BFS) enjoys from Bail Certificate innovation, which can play an important role in stabilizing and increasing efficiency of money and financial markets. Depositor (financer) receives digital Bail Certificate for this kind of participation, which is negotiable in the secondary Rastin Certificate market. Regarding the characteristics of this certificate and its clear substantial differences with futures derivative, it prevents unreal paper markets formation. The latest owner of the certificate is the owner of the commodity. Moreover, the depositor can ask the bank that the entrepreneur sells the commodity and pays the money –instead of commodity- to him at the end of the contract.

Development of textile-based triboelectric nanogenerators integrated with plastic metal electrodes for wearable devices

2019 ◽  
Vol 104 (5-8) ◽  
pp. 2633-2644 ◽  
Author(s):  
Chih-Chieh Chang ◽  
Jian-Fu Shih ◽  
Yuang-Cherng Chiou ◽  
Rong-Tsong Lee ◽  
Shih-Feng Tseng ◽  
...  
Keyword(s):  
Wearable Devices ◽  
Metal Electrodes ◽  
Plastic Metal ◽  
Triboelectric Nanogenerators

Latest Advancements in Wearable Devices

2022 ◽  
pp. 58-64
Author(s):  
Mohit Angurala
Keyword(s):  
Daily Life ◽  
Electronic Devices ◽  
Wearable Computing ◽  
Wearable Devices ◽  
Comprehensive Review ◽  
The Masses

Wearable devices have impacted the daily life of every individual. These devices come with the embedded feature that fits almost within clothes, accessories, or even watches. One of the wearables named “wrist-worn devices” has gained acceptance by the masses among other wearables. Vital information can be easily gathered with the help of such wearables. These are also suitable for myriad applications such as sports, agriculture, medical, and several more. This chapter gives a comprehensive review of wearable computing electronic devices being used in various fields and provides the latest trends in wearables. The main objective of this review is to discuss various challenges that are faced by individuals in using wearables and the latest methods that can overcome these issues. In the modern epoch, wireless wearable devices have gained a lot of importance in various fields such as sports, agriculture, medical, and many more.

Series of in-fiber graphene supercapacitors for flexible wearable devices

2015 ◽  
Vol 3 (6) ◽  
pp. 2547-2551 ◽  
Author(s):  
Yuan Liang ◽  
Zhi Wang ◽  
Jiao Huang ◽  
Huhu Cheng ◽  
Fei Zhao ◽  
...  
Keyword(s):  
Solid State ◽  
Electronic Devices ◽  
Wearable Devices ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

An integrated series of in-fiber all-solid-state graphene supercapacitors have been fabricated for flexible wearable electronic devices.

Enhancing charge transfer for ZnO nanorods based triboelectric nanogenerators through Ga doping

Nano Energy ◽  
2019 ◽  
Vol 65 ◽  
pp. 104069 ◽  
Author(s):  
Sin-Nan Chen ◽  
Ming-Zheng Huang ◽  
Zong-Hong Lin ◽  
Chuan-Pu Liu
Keyword(s):  
Charge Transfer ◽  
Zno Nanorods ◽  
Triboelectric Nanogenerators ◽  
Ga Doping

scholarly journals Development of Real-Time Measurement Platform for Stretchable and Rollable Functions of Flexible Electronics under Multiple Dynamic Loads

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 106
Author(s):  
Chang-Chun Lee ◽  
Jui-Chang Chuang ◽  
Ruei-Ci Shih ◽  
Chi-Wei Wang
Keyword(s):  
Flexible Electronics ◽  
Electronic Devices ◽  
Sine Wave ◽  
Wearable Devices ◽  
Dynamic Loads ◽  
Inspection System ◽  
Mechanical Reliability ◽  
Electronic Components ◽  
Real Time Measurement ◽  
Applied Fields

Mainstream next generation electronic devices with miniaturized structures and high levels of performance are needed to meet the characteristic requirements of electronics with flexible and stretchable capabilities. Accordingly, several applied fields of innovative electronic component techniques, such as wearable devices, foldable curtain-like displays, and flexible hybrid electronic (FHE) biosensors, are considered. This study presents a novel inspection system with multifunctions of stressing tensile and bending mechanical loads to acquire the stretchable and rollable characteristics of soft specimens. The performance of the proposed measurement platform using samples of three different geometric types is evaluated in terms of its stretchability. The results show a remarkable enhancement of mechanical reliability when the sine wave geometric structure is used. A symmetrical sine wave-shaped sample is designed to measure performance under cyclic rolling. The proposed measurement platform of flexible electronics meets the testing requirements of mechanical reliability for the development of future flexible electronic components and FHE products.

Special Issue on Wearable Robotics and Mechatronics Technology

2020 ◽  
Vol 32 (1) ◽  
pp. 137-137
Author(s):  
Takayuki Tanaka ◽  
Yuichi Kurita ◽  
Keisuke Shima ◽  
Norihisa Miki
Keyword(s):  
Electronic Devices ◽  
Wearable Devices ◽  
Health Condition ◽  
Special Issue ◽  
Generous Time ◽  
Level Of Activity ◽  
Wearable Systems ◽  
Wide Range ◽  
Calculation Processing

Many wearable devices have been developed and are being currently used, owing to the miniaturization of computers and electronic devices and advancements in calculation processing algorithms. They have various uses and forms, for example, a power assist robot for reducing the burden of work, a wearable sensor for measuring the level of activity and health condition of people and animals, and so on. In Japan, wearable devices have attracted attention as an important technology in a human-centered society (Society 5.0) and can help realize economic development and address social problems. A society that can benefit from a wide range of wearable devices is being realized. This special issue covers robotics and mechatronics technologies for next generation wearable devices to realize such a society, including wearable systems and their elemental technology, AI, IoT, and other relative technologies. We sincerely thank the authors for their fine contributions and the reviewers for their generous time and effort. We would also like to thank the Editorial Board of the Journal of Robotics and Mechatronics for their help with this special issue.

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