Results 31 to 40 of about 269,980 (281)

Thermionic-enhanced near-field thermophotovoltaics [PDF]

open access: yes, 2019
Solid-state heat-to-electrical power converters are thermodynamic engines that use fundamental particles, such as electrons or photons, as working fluids. Virtually all commercially available devices are thermoelectric generators, in which electrons flow
Datas, Alejandro, Vaillon, Rodolphe
core   +5 more sources

Optimizing the e-beam profile of a single carbon nanotube field emission device for electric propulsion systems [PDF]

open access: yesJournal of Aerospace Technology and Management, 2010
Preliminary studies on field emission (FE) arrays comprised of carbon nanotubes (CNT) as an electron source for electric propulsion system show remarkably promising results. Design parameters for a carbon nanotube (CNT) field-emission device operating on
Juliano Fujioka Mologni   +5 more
doaj  

Annealing studies and electrical properties of SnS-based solar cells [PDF]

open access: yes, 2011
Thin films of SnS (tin sulphide) were thermally evaporated onto glass and CdS/ITO (cadmium sulphide/indium tin oxide) coated glass substrates and then annealed in vacuum with the aim of optimising them for use in photovoltaic solar cell device structures.
Forbes, Ian   +4 more
core   +1 more source

Improved and simplified design of the relativistic helitron resonator

open access: yesДоклады Белорусского государственного университета информатики и радиоэлектроники, 2020
One of the main trends in microwave electronics is the ultra-large power production. The electron stream energy is converted inside vacuum systems, where the key moment is increasing output power of microwave devices, which is possible only when using ...
A. A. Kurayev, V. V. Matveyenka
doaj   +1 more source

Science and applications of wafer-scale crystalline carbon nanotube films prepared through controlled vacuum filtration [PDF]

open access: yes, 2018
Carbon nanotubes (CNTs) make an ideal one-dimensional (1D) material platform for the exploration of exotic physical phenomena under extremely strong quantum confinement.
Gao, Weilu, Kono, Junichiro
core   +2 more sources

Fabrication of graphene nanogap with crystallographically matching edges and its electron emission properties

open access: yes, 2009
We demonstrate the fabrication of graphene nanogap with crystallographically matching edges on SiO2Si substrates by divulsion. The current-voltage measurement is then performed in a high-vacuum chamber for a graphene nanogap with few hundred nanometers ...
Guo, Z. B.   +6 more
core   +1 more source

Is there a resting frame in the universe? A proposed experimental test based on a precise measurement of particle mass [PDF]

open access: yes, 2017
According to the Special Theory of Relativity, there should be no resting frame in our universe. Such an assumption, however, could be in conflict with the Standard Model of cosmology today, which regards the vacuum not as an empty space.
Chang, Donald C.
core   +3 more sources

Ultrafast High-Voltage Kicker System for Ion-Clearing Gaps

open access: yesPhotonics, 2021
Ionization scattering of electron beams with residual gas molecules causes ion trapping in electron rings, both in a collider and electron cooling system.
Alexander Yu. Smirnov   +10 more
doaj   +1 more source

Tunable Broadband Photoresponse Electron‐Emission Nanostructure: Metasurface‐Extended Spectrum‐Selecting and Plasmon‐Enhanced Emitting

open access: yesAdvanced Photonics Research, 2022
Exploring novel nanotechnology schemes for tunable broadband vacuum photodetection devices is of great significance. Herein, a strategy to combine a field‐emission cold cathode with plasmonic nanostructures to form a plasmon‐enhanced field‐emission ...
Yan Shen   +4 more
doaj   +1 more source

Plasmonic Gold Nanorod Size-Controlled: Optical, Morphological, and Electrical Properties of Efficiency Improved Tin Disulfide Vacuum-Free Hybrid Solar Cells

open access: yesMetals, 2021
The different size of plasmonic gold nanorods (NRs) were synthesized by the overgrown seeds method and applied to vacuum-free hybrid solar cells (VFHSCs).
Minsu Kim   +6 more
doaj   +1 more source

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