Performance Enhancement of Flexible Piezoelectric Nanogenerator via Doping and Rational 3D Structure Design For Self‐Powered Mechanosensational System

2019 ◽  
Vol 29 (42) ◽  
pp. 1904259 ◽  
Author(s):  
Yuanzheng Zhang ◽  
Mengjun Wu ◽  
Quanyong Zhu ◽  
Feiyu Wang ◽  
Huanxin Su ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
3D Structure ◽  
Structure Design ◽  
Self Powered

A Self-powered and Sensitive Terahertz Photodetection based on PdSe2

2022 ◽  
Author(s):  
Jie Zhou ◽  
Xueyan Wang ◽  
Zhiqingzi Chen ◽  
Libo Zhang ◽  
Chengyu Yao ◽  
...  
Keyword(s):  
Homeland Security ◽  
Room Temperature ◽  
Performance Enhancement ◽  
Rapid Development ◽  
Rapid Response ◽  
Medical Sciences ◽  
Terahertz Detection ◽  
Order Of Magnitude ◽  
Self Powered ◽  
Low Dimensional

Abstract With the rapid development of terahertz technology, terahertz detectors are expected to play a key role in diverse areas such as homeland security and imaging, materials diagnostics, biology and medical sciences, communication. Whereas self-powered, rapid response, and room temperature terahertz photodetectors are confronted with huge challenges. Here, we report a novel rapid response and self-powered terahertz photothermoelectronic (PTE) photodetector based on a low-dimensional material: palladium selenide (PdSe2). An order of magnitude performance enhancement was observed in photodetection based on PdSe2/graphene heterojunction that resulted from the integration of graphene and enhanced the Seebeck effect. Under 0.1 THz and 0.3 THz irradiation, the device displays a stable and repeatable photoresponse at room temperature without bias. Furthermore, rapid rise (5.0 μs) and decay (5.4 μs) times are recorded under 0.1 THz irradiation. Our results demonstrate the promising prospect of the detector based on PdSe2 in terms of air-stable, suitable sensitivity, and speed, which may have great application in terahertz detection.

scholarly journals 3D structure design of magnetic ferrite cores using gelcasting and pressure-less sintering process

AIP Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 035006 ◽  
Author(s):  
A. Stratta ◽  
B. Ahmadi ◽  
B. Mouawad ◽  
S. Robertson ◽  
L. De Lillo ◽  
...  
Keyword(s):  
3D Structure ◽  
Structure Design ◽  
Sintering Process

Nonlinear Dynamics and Design of Aeroelastic Energy Harvesters

2015 ◽  
pp. 341-379
Author(s):  
Abdessattar Abdelkefi
Keyword(s):  
Wireless Sensors ◽  
Performance Enhancement ◽  
Circular Cylinders ◽  
Medical Implants ◽  
Energy Harvesters ◽  
Vortex Induced Vibrations ◽  
Flow Induced Vibrations ◽  
Self Powered ◽  
And Performance

The concept of harvesting energy from flow-induced vibrations has received a great deal of attention in the last few years. This technology would help in the replacement of small batteries that require expensive and time consuming maintenance and development of self-powered electronic devices, such as health monitoring sensors, medical implants, data transmitters, wireless sensors, and cameras. In this chapter, a particular focus is paid to the concept of harvesting energy from aeroelastic instabilities, such as flutter in airfoil sections, vortex-induced vibrations in circular cylinders, and galloping in prismatic structures. Nonlinear electroaeroelastic models for these energy harvesters are derived and validated with experimental measurements. It is shown how linear and nonlinear analyses can be used to breach traditional barriers in the design and performance enhancement of these aeroelastic energy harvesters, characterization of their behaviors, and identification of the contribution of different types of nonlinearities.

3D Printing of Biosamples: A Concise Review

2017 ◽  
Vol 05 (02) ◽  
pp. 1740002
Author(s):  
Victoria Xin Ting Zhao ◽  
Ten It Wong ◽  
Xiaodong Zhou
Keyword(s):  
3D Printing ◽  
Self Assembly ◽  
3D Structure ◽  
Structure Design ◽  
Advantages And Disadvantages ◽  
Concise Review ◽  
Recent Developments ◽  
Good Biocompatibility ◽  
Extrusion Printing ◽  
3D Applications

This paper reviews the recent development of 3D printing of biosamples, in terms of the 3D structure design, suitable printing technology, and available materials. Successfully printed 3D biosamples should possess the properties of high cell viability, vascularization and good biocompatibility. These goals are attained by printing the materials of hydrogels, polymers and cells, with a carefully selected 3D printer from the categories of inkjet printing, extrusion printing and laser printing, based on the uniqueness, advantages and disadvantages of these technologies. For recent developments, we introduce the 3D applications of creating scaffolds, printing cells for self-assembly and testing platforms. We foresee more bio-applications of 3D printing will be developed, with the advancements on materials and 3D printing machines.

Dynamic Simulation Analysis on Flexible Assembling Fixture for Aircraft Panel Component

2010 ◽  
Vol 37-38 ◽  
pp. 382-385
Author(s):  
Li Gang Qu ◽  
Ke Qiang Pan ◽  
Xin Chen
Keyword(s):  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Dynamic Theory ◽  
3D Structure ◽  
Structure Design ◽  
Assembly Process ◽  
Effective Solution ◽  
Technical Approach ◽  
Engineering Significance ◽  
Equipment Performance

Flexible assembling fixture (FAF) is a new-style assembling equipment in assembly process of aircraft panel components, which is developed based on combination of digitization of assembling and automated modular fixture. The multi-actuator is designed to positioning and clamping the panel component. The dynamic behavior of the FAF is analyzed in process of 3D structure design. The motion and displacement of every actuator are analyzed based on kinematic and dynamic theory, by means of building the Knopoff model taking friction between the vice sport into account. ADAMS is employed to carry out the dynamic simulation. This technical approach is the effective solution for developing the new equipment; moreover, its result presents a great engineering significance in improving the equipment performance.

scholarly journals Design and Simulation of Capacitive MEMS Switch for Ka Band Application

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Vinay Bhatia ◽  
Sukhdeep Kaur ◽  
Kuldeep Sharma ◽  
Punam Rattan ◽  
Vishal Jagota ◽  
...  
Keyword(s):  
Frequency Band ◽  
Phase Shifter ◽  
Rf Mems ◽  
Dielectric Material ◽  
Actuation Voltage ◽  
3D Structure ◽  
Structure Design ◽  
High Resistivity ◽  
Ka Band ◽  
Mems Switch

In this paper, RF MEMS switch with capacitive contact is designed and analyzed for Ka band application. A fixed-fixed beam/meander configuration has been used to design the switch for frequency band 10 GHz to 40 GHz. Electromagnetic and electromechanical analysis of three-dimensional (3D) structure/design has been analyzed in multiple finite element method (FEM) based full-wave simulator (Coventorware and high-frequency structure simulator). A comparative study has also been carried out in this work. The high resistivity silicon substrate ( tan δ = 0.010 , ρ > 8   k Ω − cm , ε r = 11.8 ) with a thickness of 675 ± 25   μ m has been taken for switch realization. The designed structure shows an actuation voltage of around 9.2 V. Impedance matching for the switch structure is well below 20 dB, loss in upstate, i.e., insertion loss >0.5 dB, and isolation of >25 dB throughout the frequency band is observed for the aforesaid structure. Furthermore, to increase the RF parameters, AIN dielectric material has been used instead of SiO2 resulting in capacitance in downstate that increases hence improved the isolation. The proposed switch can be utilized in various potential applications such as any switching/tunable networks phased-array radar, reconfigurable antenna, RF phase shifter, mixer, biomedical, filter, and any transmitter/receiver (T/R) modules.

scholarly journals Recent Advances in Self-Powered Piezoelectric and Triboelectric Sensors: From Material and Structure Design to Frontier Applications of Artificial Intelligence

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8422
Author(s):  
Zetian Yang ◽  
Zhongtai Zhu ◽  
Zixuan Chen ◽  
Mingjia Liu ◽  
Binbin Zhao ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Material Design ◽  
Structure Design ◽  
Flexible Sensors ◽  
Limited Life ◽  
Self Powered ◽  
Triboelectric Nanogenerators ◽  
Application Fields ◽  
The Internet Of Things ◽  
Development Prospects

The development of artificial intelligence and the Internet of things has motivated extensive research on self-powered flexible sensors. The conventional sensor must be powered by a battery device, while innovative self-powered sensors can provide power for the sensing device. Self-powered flexible sensors can have higher mobility, wider distribution, and even wireless operation, while solving the problem of the limited life of the battery so that it can be continuously operated and widely utilized. In recent years, the studies on piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs) have mainly concentrated on self-powered flexible sensors. Self-powered flexible sensors based on PENGs and TENGs have been reported as sensing devices in many application fields, such as human health monitoring, environmental monitoring, wearable devices, electronic skin, human–machine interfaces, robots, and intelligent transportation and cities. This review summarizes the development process of the sensor in terms of material design and structural optimization, as well as introduces its frontier applications in related fields. We also look forward to the development prospects and future of self-powered flexible sensors.

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