scholarly journals Energy Harvesting: Micropatterned P(VDF-TrFE) Film-Based Piezoelectric Nanogenerators for Highly Sensitive Self-Powered Pressure Sensors (Adv. Funct. Mater. 21/2015)

2015 ◽  
Vol 25 (21) ◽  
pp. 3276-3276 ◽  
Author(s):  
Ju-Hyuck Lee ◽  
Hong-Joon Yoon ◽  
Tae Yun Kim ◽  
Manoj Kumar Gupta ◽  
Jeong Hwan Lee ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Pressure Sensors ◽  
Highly Sensitive ◽  
Self Powered ◽  
Piezoelectric Nanogenerators

Micropatterned P(VDF-TrFE) Film-Based Piezoelectric Nanogenerators for Highly Sensitive Self-Powered Pressure Sensors

2015 ◽  
Vol 25 (21) ◽  
pp. 3203-3209 ◽  
Author(s):  
Ju-Hyuck Lee ◽  
Hong-Joon Yoon ◽  
Tae Yun Kim ◽  
Manoj Kumar Gupta ◽  
Jeong Hwan Lee ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Highly Sensitive ◽  
Self Powered ◽  
Piezoelectric Nanogenerators

Self-powered flexible pressure sensors with vertically well-aligned piezoelectric nanowire arrays for monitoring vital signs

2015 ◽  
Vol 3 (45) ◽  
pp. 11806-11814 ◽  
Author(s):  
Xiaoliang Chen ◽  
Jinyou Shao ◽  
Ningli An ◽  
Xiangming Li ◽  
Hongmiao Tian ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Vital Signs ◽  
Nanowire Arrays ◽  
Highly Sensitive ◽  
Polarization Orientation ◽  
Self Powered ◽  
Flexible Pressure Sensors

We propose an in situ poling of vertically well-aligned piezoelectric nanowire arrays with preferential polarization orientation as highly sensitive self-powered sensors for monitoring vital signs.

Branched ZnO nanotrees on flexible fiber-paper substrates for self-powered energy-harvesting systems

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5941-5945 ◽  
Author(s):  
Y. Qiu ◽  
D. C. Yang ◽  
B. Yin ◽  
J. X. Lei ◽  
H. Q. Zhang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Output Voltage ◽  
High Performance ◽  
Flexible Fiber ◽  
Harvesting Systems ◽  
Self Powered ◽  
Piezoelectric Nanogenerators ◽  
Paper Substrates

Branched ZnO nanotrees have been successfully synthesized on flexible fiber-paper substrates for realizing high-performance piezoelectric nanogenerators. And the output voltage of the NG increased to 0.1 V, enough to power some micro/nano devices.

Piezoelectricity and Flexoelectricity from an Energy Harvesting Perspective: Nanogenerators

2021 ◽  
Vol 30 (9) ◽  
pp. 11-15
Author(s):  
Yoon-Hwae HWANG
Keyword(s):  
Energy Harvesting ◽  
Mechanical Energy ◽  
Electric Energy ◽  
Wearable Electronics ◽  
Power Sources ◽  
Sufficient Power ◽  
External Sources ◽  
Self Powered ◽  
Energy Harvesting Devices ◽  
Piezoelectric Nanogenerators

Energy harvesting is the process by which energy can be obtained from external sources and used for wearable electronics and wireless sensor networks. Piezoelectric nanogenerators are energy harvesting devices that convert mechanical energy into electric energy by using nanostructured materials. This article summarizes work to date on piezoelectric nanogenerators, starting with the basic theory of piezo- and flexo-electricity and moving through reports on nanogenerators using nanostructures, flexible substrates and alternative materials. A sufficient power generated from nanogenerators suggests feasible applications for either power sources or strain sensors of highly integrated nanodevices. Further improvements in nanogenerators holds promise for the development of self-powered implantable and wearable electronics.

scholarly journals Electrode and electrolyte configurations for low frequency motion energy harvesting based on reverse electrowetting

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pashupati R. Adhikari ◽  
Nishat T. Tasneem ◽  
Russell C. Reid ◽  
Ifana Mahbub
Keyword(s):  
Energy Harvesting ◽  
Bias Voltage ◽  
Energy Harvester ◽  
Superior Performance ◽  
Maximum Output ◽  
Electrowetting On Dielectric ◽  
External Bias ◽  
Motion Energy ◽  
Ac Current ◽  
Self Powered

AbstractIncreasing demand for self-powered wearable sensors has spurred an urgent need to develop energy harvesting systems that can reliably and sufficiently power these devices. Within the last decade, reverse electrowetting-on-dielectric (REWOD)-based mechanical motion energy harvesting has been developed, where an electrolyte is modulated (repeatedly squeezed) between two dissimilar electrodes under an externally applied mechanical force to generate an AC current. In this work, we explored various combinations of electrolyte concentrations, dielectrics, and dielectric thicknesses to generate maximum output power employing REWOD energy harvester. With the objective of implementing a fully self-powered wearable sensor, a “zero applied-bias-voltage” approach was adopted. Three different concentrations of sodium chloride aqueous solutions (NaCl-0.1 M, NaCl-0.5 M, and NaCl-1.0 M) were used as electrolytes. Likewise, electrodes were fabricated with three different dielectric thicknesses (100 nm, 150 nm, and 200 nm) of Al2O3 and SiO2 with an additional layer of CYTOP for surface hydrophobicity. The REWOD energy harvester and its electrode–electrolyte layers were modeled using lumped components that include a resistor, a capacitor, and a current source representing the harvester. Without using any external bias voltage, AC current generation with a power density of 53.3 nW/cm2 was demonstrated at an external excitation frequency of 3 Hz with an optimal external load. The experimental results were analytically verified using the derived theoretical model. Superior performance of the harvester in terms of the figure-of-merit comparing previously reported works is demonstrated. The novelty of this work lies in the combination of an analytical modeling method and experimental validation that together can be used to increase the REWOD harvested power extensively without requiring any external bias voltage.

scholarly journals Time-Multiplexed Self-Powered Wireless Current Sensor for Power Transmission Lines

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1561
Author(s):  
Hao Chen ◽  
Zhongnan Qian ◽  
Chengyin Liu ◽  
Jiande Wu ◽  
Wuhua Li ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Current Measurement ◽  
Current Sensor ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Current Sensing ◽  
Self Powered

Current measurement is a key part of the monitoring system for power transmission lines. Compared with the conventional current sensor, the distributed, self-powered and contactless current sensor has great advantages of safety and reliability. By integrating the current sensing function and the energy harvesting function of current transformer (CT), a time-multiplexed self-powered wireless sensor that can measure the power transmission line current is presented in this paper. Two operating modes of CT, including current sensing mode and energy harvesting mode, are analyzed in detail. Through the design of mode-switching circuit, harvesting circuit and measurement circuit are isolated using only one CT secondary coil, which eliminates the interference between energy harvesting and current measurement. Thus, the accurate measurement in the current sensing mode and the maximum energy collection in the energy harvesting mode are both realized, all of which simplify the online power transmission line monitoring. The designed time-multiplexed working mode allows the sensor to work at a lower transmission line current, at the expense of a lower working frequency. Finally, the proposed sensor is verified by experiments.

Highly sensitive and stable fructose self-powered biosensor based on a self-charging biosupercapacitor

2021 ◽  
Vol 176 ◽  
pp. 112909
Author(s):  
Paolo Bollella ◽  
Zhanna Boeva ◽  
Rose-Marie Latonen ◽  
Kenji Kano ◽  
Lo Gorton ◽  
...  
Keyword(s):  
Highly Sensitive ◽  
Self Powered
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