Field Emission of Electrons from Single LaB6 Nanowires

2006 ◽  
Vol 18 (1) ◽  
pp. 87-91 ◽  
Author(s):  
H. Zhang ◽  
J. Tang ◽  
Q. Zhang ◽  
G. Zhao ◽  
G. Yang ◽  
...  
Keyword(s):  
Field Emission ◽  
Field Emission Of Electrons

Nanotube Carbon Structure Tips - A Source of High Field Emission of Electrons

1994 ◽  
Vol 359 ◽  
Author(s):  
Leonid A. Chernozatonskii ◽  
Yu.V. Gulyaev ◽  
Z.Ja. Kosakoyskaja ◽  
N.I. Sinitsyn ◽  
G.V. Torgashov ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Quartz Glass ◽  
High Field ◽  
Emission Current ◽  
Carbon Structure ◽  
Glass Density ◽  
And Inversion ◽  
Field Emission Of Electrons

ABSTRACTWe present the finding of experiments of considerable field emission from the films consisting of nanotube carbon structureson various substrates (Si, quartz, glass): density of emission current was up to 1-3 A/cm2 while electric field was about 100 V/μ. The “reconstruction” and “inversion” of field emission have also been observed after current breakdown.

scholarly journals Effect of heating and resistance on emission properties of carbon nanotubes

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Sergey V. Bulyarskiy 1 ◽  
Alexander A. Dudin 1 ◽  
Alexander V. Lakalin 1 ◽  
Andrey P. Orlov 1 ◽  
Alexander A. Pavlov 1 ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Thermionic Emission ◽  
Negative Resistance ◽  
Cvd Method ◽  
Field Emission Current ◽  
Multi Walled Carbon Nanotube ◽  
Voltage Current Characteristic ◽  
Field Emission Of Electrons ◽  
A Current

We have studied the effect of the series resistance on the heating of the cathode, which is based on carbon nanotubes and serves to realize the field emission of electrons into the vacuum. The experiment was performed with the single multi-walled carbon nanotube (MCNT) that was separated from the array grown by CVD method with thin-film Ni-Ti catalyst (nickel 4 nm / Ti 10 nm). The heating of the cathode leads to the appearance of a current of the thermionic emission. The experimental voltage current characteristic exhibited the negative resistance region caused by thermal field emission. This current increases strongly with increasing voltage and contributes to the degradation of the cold emitter. The calculation of the temperature of the end of the cathode is made taking into account the effect of the phenomenon that warms up and cools the cathode. We have developed a method for processing of the emission volt-ampere characteristics of a cathode, which relies on a numerical calculation of the field emission current and the comparison of these calculations with experiments. The model of the volt-ampere characteristic takes into account the CNT’s geometry, properties, its contact with the catalyst; heating and simultaneous implementation of the thermionic and field emission. The calculation made it possible to determine a number of important parameters, among which the voltage and current of the beginning of thermionic emission, the temperature distribution along the cathode, the resistance of the nanotube. The phenomenon of thermionic emission from CNT’s was investigated experimentally and theoretically. The conditions of this type emission occurrence were defined. The results of the study could form the basis of theory of CNT emitter’s degradation.

Thermal Transport During Nanoscale Machining by Field Emission of Electrons from Carbon Nanotubes

2003 ◽  
Vol 125 (4) ◽  
pp. 546-546 ◽  
Author(s):  
C. Trinkle ◽  
P. Kichambare ◽  
R. R. Vallance ◽  
B. Sadanadan ◽  
A. M. Rao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Thermal Transport ◽  
Field Emission Of Electrons

An in situ TEM Study of Field Emission of Electrons from LaB6 Nanowires

2007 ◽  
Vol 13 (S02) ◽  
Author(s):  
H Zhang ◽  
J Tang ◽  
Q Zhang ◽  
O Zhou ◽  
L-C Qin
Keyword(s):  
Field Emission ◽  
In Situ Tem ◽  
Field Emission Of Electrons

scholarly journals Field Emission Properties of Carbon Nanotubes with Boron Doping and H2O Adsorption

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Yijun Wang ◽  
Liuding Wang ◽  
Cheng Yan
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Boron Atom ◽  
Gas Adsorption ◽  
Mulliken Charge ◽  
Electronic Density ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Electron Field ◽  
Field Emission Of Electrons

Gas adsorption and atom doping usually present when preparing carbon nanotubes (CNTs) and can affect the field emission properties of carbon nanotubes. H2O molecule and boron atom are the most important adsorbates, respectively. Using ab-initio calculations, we have investigated the electron field emission performance of CNTs simultaneously adsorbed with one H2O molecule and doped with one boron atom (BCNT+H2O) in this paper. The results indicate that the electrons localize at the top of BCNT+H2O and the electronic density of states (DOS) around the Fermi level is enhanced obviously. It is expected that BCNT+H2O will be more propitious to the field emission of electrons based on the calculations of DOS, HOMO/LUMO, and Mulliken charge population.

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