scholarly journals Motion sensors achieved from a conducting polymer-metal Schottky contact

RSC Advances ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 6576-6582 ◽  
Author(s):  
Yang Zhou ◽  
Jian Fang ◽  
Hongxia Wang ◽  
Hua Zhou ◽  
Guilong Yan ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Conducting Polymer ◽  
Schottky Contact ◽  
Electrical Energy ◽  
Motion Sensors ◽  
Potential Applications ◽  
Polymer Metal ◽  
Energy Conversion Devices

Mechanical-to-electrical energy conversion devices show potential applications in the detection of movements.

Thermoelectric Transport in Silicon Germanium Nanocomposite

2008 ◽  
Author(s):  
Hohyun Lee ◽  
Daryoosh Vashaee ◽  
Xiaowei Wang ◽  
Giri Joshi ◽  
Gaohua Zhu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Energy Conversion ◽  
Silicon Germanium ◽  
Figure Of Merit ◽  
Waste Heat ◽  
Electrical Energy ◽  
Energy Conversion Efficiency ◽  
Thermoelectric Effects ◽  
Thermoelectric Transport ◽  
Potential Applications

Direct energy conversion between heat and electrical energy based on thermoelectric effects is attractive for potential applications in waste heat recovery and environmentally-friendly refrigeration. The energy conversion efficiency depends on the dimensionless figure of merit of thermoelectric materials, ZT, which is proportional to the electrical conductivity, the square of the Seebeck coefficient, and the inverse of the thermal conductivity. Currently, the low ZT values of available materials restrict the applications of this technology. However, significant enhancements in ZT were recently reported in nanostructured materials such as superlattices mainly due to their low thermal conductivities. According to recent studies, the reduced thermal conductivity of nanostructures is attributed to the large number of interfaces at which phonons are scattered. Based on this idea, nanocomposites are expected to have a lower thermal conductivity than their bulk counterparts with low fabrication cost just by mixing nano sized particles. In this work, we will discuss mechanisms of thermoelectric transport via modeling and provide experimental evidence on the enhancement of thermoelectric figure of merit in SiGe-based nanocomposites.

Hexamethyl-p-terphenyl poly(benzimidazolium): a universal hydroxide-conducting polymer for energy conversion devices

2016 ◽  
Vol 9 (6) ◽  
pp. 2130-2142 ◽  
Author(s):  
Andrew G. Wright ◽  
Jiantao Fan ◽  
Benjamin Britton ◽  
Thomas Weissbach ◽  
Hsu-Feng Lee ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Energy Conversion ◽  
Conducting Polymer ◽  
Hydrogen Fuel Cell ◽  
Hydrogen Fuel ◽  
Energy Conversion Devices

A benchmark hydroxide-conducting polymer is utilized in alkaline hydrogen fuel cell and water electrolyzer devices at 60 °C for >100 hours.

Novel Two-Stage Electrical Energy Generators for Highly-Variable and Low-Speed Linear or Rotary Input Motions

2008 ◽  
Author(s):  
Jahangir S. Rastegar ◽  
Richard T. Murray
Keyword(s):  
Energy Conversion ◽  
Low Frequency ◽  
Electrical Energy ◽  
Energy Conversion Efficiency ◽  
High Energy ◽  
Control Mechanisms ◽  
Two Stage ◽  
Constant Frequency ◽  
Low Speed ◽  
Potential Applications

A novel class of two-stage, vibration-based electrical energy generators is presented for linear or rotary input motions in applications which the input speed is relatively low and varies significantly over time such as wind mills, turbo-machinery used to harvest tidal flows, devices for harnessing coastal wave energy, and the like. Current technologies use magnet-and-coil based electrical generators in such machinery. However, to make the generation cycle efficient, gearing or other similar mechanisms must be used to increase the input speed. Variable speed-control mechanisms are also usually needed to achieve high energy conversion efficiency. Additionally, in many applications, such as those where energy is to be harvested from very low frequency oscillations of a platform such as a buoy or a ship, the use of speed increasing mechanisms such as gearing or the like is impractical. In this paper, a novel class of two-stage electrical energy generators that could operate with very low speed and highly variable input rotations and/or oscillations is described. The first stage consists of simple linkage mechanisms, which are used to excite vibratory elements. These two-stage generators are designed to convert low-speed and highly variable input rotations and oscillations to relatively high and constant frequency vibratory motions, which are then used to generate electrical energy using mechanical to electrical energy conversion devices such as piezoelectric elements. The design of a number of such two-stage generators together with a discussion of their potential applications is presented.

Nonadiabatic Chemical-to-Electrical Energy Conversion in Catalytic Schottky Junction Nanostructures

2011 ◽  
Vol 1311 ◽  
Author(s):  
Eduard G. Karpov ◽  
Jyotsna Mohan
Keyword(s):  
Energy Conversion ◽  
Water Oxidation ◽  
Metal Layer ◽  
Thermionic Emission ◽  
Electrical Energy ◽  
Sensor Applications ◽  
Device Architecture ◽  
Nanostructure Surface ◽  
Catalytic Hydrogen ◽  
Energy Conversion Devices

ABSTRACTNonadiabatic energy dissipation by electron subsystem of nanostructured solids unveil interesting opportunities for the solid-state energy conversion and sensor applications. We found that planar Pd/n-SiC, Pt/n-GaP and Pd/n-GaP Schottky structures with nanometer thickness metallization demonstrates a nonadiabatic channel for the conversion into electricity the energy of a catalytic hydrogen-to-water oxidation process on the metal layer surface. The observed abovethermal current greatly complements the usual thermionic emission current, and its magnitude is linearly proportional to the rate of formation and desorption of product water molecules from the nanostructure surface. The possibilities and advantages of utilizing the nonadiabatic functionality in a novel class of chemical-to-electrical energy conversion devices are discussed. The technology has a potential for a very high volumetric energy density due to the intrinsically planar device architecture.

A Novel Wind Power Micro-Generator Research on Dielectric Electro Active Polymer

2014 ◽  
Vol 1039 ◽  
pp. 415-426 ◽  
Author(s):  
Gui Juan Lin ◽  
Ke Sheng Wang
Keyword(s):  
Energy Harvesting ◽  
Energy Conversion ◽  
Wind Power ◽  
Mechanical Strain ◽  
Electrical Energy ◽  
Experimental Investigations ◽  
Wave Power ◽  
Potential Applications ◽  
Push Forward ◽  
Set Up

Wind power is emerging as a particularly attractive form of renewable energy. The predomination of Dielectric Electric Active Polymer (DEAP) has been shown to operate in transforming mechanical strain energy to electrical energy as generator mode. Their characteristics make them potentially well suited for wind power takeoff systems. In this article, a novel DEAP micro generator is successfully developed about mechanical-electro energy conversion model. The proposed energy harvesting is based on capacity change induced by the mechanical strain. With the Mooney-Rivlin model, the theoretical modeling of energy harvesting cycle are analyzed. To verify the theoretical analysis, the prototype has been set up on the DEAP wind power micro-generator in this work. Many experiments were performed to verify the usability of the proposed DEAP generator method. These experimental investigations coincide with the energy conversion theory analytical model. The DEAPs have been proved to provide electrical energy with density as high as 1.5J.g-1.This value is much higher compared with the density of piezoelectric polymer (0.3J.g-1). The work will push forward the practical use of wave power for supplying general electrical needs, and supply theoretical foundation for potential applications such as ocean wave power.

Nonadiabatic Chemical to Electrical Energy Conversion in Planar Schottky Nanostructures

2010 ◽  
Author(s):  
Eduard G. Karpov ◽  
Ievgen Nedrygailov
Keyword(s):  
Energy Conversion ◽  
Water Oxidation ◽  
Metal Layer ◽  
Thermionic Emission ◽  
Electrical Energy ◽  
Sensor Applications ◽  
Device Architecture ◽  
Nanostructure Surface ◽  
Catalytic Hydrogen ◽  
Energy Conversion Devices

Nonadiabatic energy dissipation by electron subsystem of nanostructured solids unveil interesting opportunities for the solid-state energy conversion and sensor applications. We found that planar Pd/n-SiC, Pt/n-GaP and Pd/n-GaP Schottky structures with nanometer thickness metallization demonstrates a nonadiabatic channel for the conversion into electricity the energy of a catalytic hydrogen-to-water oxidation process on the metal layer surface. The observed abovethermal current greatly complements the usual thermionic emission current, and its magnitude is linearly proportional to the rate of formation and desorption of product water molecules from the nanostructure surface. The possibilities and advantages of utilizing the nonadiabatic functionality in a novel class of chemical-to-electrical energy conversion devices are discussed. The technology has a potential for a very high volumetric energy density due to the intrinsically planar device architecture.

scholarly journals Nanoplasmonic for Solar Energy Conversion Devices

Solar Cells ◽  
2020 ◽  
Author(s):  
Samy K.K. Shaat ◽  
Hussam Musleh ◽  
Jihad Asad ◽  
Nabil Shurrab ◽  
Ahmed Issa ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Solar Energy Conversion ◽  
Energy Conversion Devices
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