scholarly journals The role of Hurst exponent on cold field electron emission from conducting materials: from electric field distribution to Fowler-Nordheim plots

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
T. A. de Assis
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Electron Emission ◽  
Hurst Exponent ◽  
Electric Field Distribution ◽  
Field Electron Emission ◽  
Field Electron ◽  
Conducting Materials

scholarly journals Model of Field Electron Emission from the Edge of Flat Graphene into Vacuum

2019 ◽  
Vol 10 (1) ◽  
pp. 61-68
Author(s):  
N. A. Poklonski ◽  
A. I. Siahlo ◽  
S. A. Vyrko ◽  
S. V. Ratkevich ◽  
A. T. Vlassov
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Graphene Sheet ◽  
Current Density ◽  
Electron Emission ◽  
Field Effect ◽  
Field Electron Emission ◽  
Graphene Plane ◽  
Field Electron ◽  
Electron Emitters

Graphene-based nanostructures are the promising materials for applications as electron emitters.The aim of the work is to study the field electron emission from the edge of a single graphene plane.In the semi-classical approximation, a model of field electron emission from the edge of a rectangular graphene sheet has been developed.The current density of field electron emission into vacuum from the edge of a flat graphene sheet was calculated depending on the magnitude of the pulling electric field strength.The analysis and comparison of limiting emission currents from graphene and from bulk systems have been carried out.The results of the work can be used in the development of graphene-based field effect cathodes.

scholarly journals Field Electron Emission Experiments with Cold-Sprayed Cu-SiC Composite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 134
Author(s):  
Marcin Winnicki ◽  
Wojciech Łapa ◽  
Zbigniew Znamirowski
Keyword(s):  
Silicon Carbide ◽  
Electric Field ◽  
Composite Coating ◽  
Field Emission ◽  
Electron Emission ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Field Electron Emission ◽  
Powder Morphology ◽  
Field Electron

Field electron emission of cold-sprayed copper-silicon carbide composite coating on a steel substrate was investigated. Two types of copper powders morphologies, namely dendritic and spherical, were mixed with crushed silicon carbide ceramic, and used as a feedstock. The powder mixtures were sprayed on the substrates and formed coatings with the designed surface topography—(i) flat and (ii) wavy. The microstructure of the coatings as well as the ceramic contents were analyzed. Initial tests proved that field emission from the Cu-SiC composite coatings was possible and depended mostly on the copper powder morphology. It was found out that the additional SiC layer deposited onto the composite coating significantly increased the number of electron emitters and thus improved the intensity of field emission. The Fowler–Nordheim model was used to find the threshold electric field, Eth, and coefficient of electric field amplification, β. These important properties of Cu/SiC + SiC coatings were found to be in the range of Eth = 20 to 24 V/µm and β = 340 to 410, respectively.

Role of humidity in local anodic oxidation: A study of water condensation and electric field distribution

2009 ◽  
Vol 79 (19) ◽  
Author(s):  
Miroslav Bartošík ◽  
David Škoda ◽  
Ondřej Tomanec ◽  
Radek Kalousek ◽  
Pavel Jánský ◽  
...  
Keyword(s):  
Electric Field ◽  
Anodic Oxidation ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Water Condensation ◽  
Local Anodic Oxidation
Sign in / Sign up

Export Citation Format

Share Document