Field emission properties of spinel ZnCo2O4 microflowers

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 5372-5378 ◽  
Author(s):  
Satyajit Ratha ◽  
Ruchita T. Khare ◽  
Mahendra A. More ◽  
Ranjit Thapa ◽  
Dattatray J. Late ◽  
...  
Keyword(s):  
Field Emission ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Field Enhancement Factor ◽  
Emission Performance ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Performance ◽  
Facile Route

Spinel ZnCo2O4 microflowers were synthesized by a facile route and their field emission properties were studied in detail. They showed intriguing Field emission performance in terms of good field-enhancement factor and stability.

High-field emission performance of a NiFe2O4/rGO/CNT tertiary nanocomposite

RSC Advances ◽  
2016 ◽  
Vol 6 (32) ◽  
pp. 26745-26751 ◽  
Author(s):  
K. Hareesh ◽  
Sachin R. Suryawanshi ◽  
B. Shateesh ◽  
Deodatta M. Phase ◽  
Shailendra S. Dahiwale ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Field Emission ◽  
High Field ◽  
Emission Performance ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Reduced Graphene ◽  
Field Emission Performance

Herein, we report the field emission properties of NiFe2O4/reduced graphene oxide/carbon nanotubes (NGC) and compared them with the field emission properties of NiFe2O4/carbon nanotubes (NC) and NiFe2O4/reduced graphene oxide (NG).

Template synthesis of metal tungsten nanowire bundles with high field electron emission performance

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62668-62674 ◽  
Author(s):  
Yong Liu ◽  
Kun Lan ◽  
Mahir H. Es-Saheb ◽  
Ahmed A. Elzatahry ◽  
Dongyuan Zhao
Keyword(s):  
Field Emission ◽  
Template Synthesis ◽  
Electron Emission ◽  
Enhancement Factor ◽  
High Field ◽  
Field Enhancement ◽  
Field Electron Emission ◽  
Field Enhancement Factor ◽  
Emission Performance ◽  
Turn On

A H2 reduction-assisted hard-templating approach is demonstrated to synthesize metallic W nanowire bundles. The W nanowire bundles show a low turn-on field of 4.1 V μm−1, a high field enhancement factor up to 3563 and good field emission stability.

Enhancement of Electron Emission Properties of Carbon Nanotubes by the Decoration with Low Work Function Metal Oxide Nanoparticles

2020 ◽  
Vol 20 (10) ◽  
pp. 6463-6468 ◽  
Author(s):  
Mohammad M. H. Raza ◽  
Sunny Khan ◽  
Mohd Sadiq ◽  
Mohammad Zulfequar ◽  
Mushahid Husain ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Work Function ◽  
Field Emission ◽  
Electron Emission ◽  
Enhancement Factor ◽  
Metal Oxide Nanoparticles ◽  
Field Enhancement ◽  
Field Enhancement Factor ◽  
Oxide Nanoparticles ◽  
Emission Properties

In the present report, the properties of the field emission devices of carbon nanotubes (CNTs) were remarkably improved by decorating their surface with magnesium oxide nanoparticles (MgO NPs). The MgO NPs were attached effectively on the surface of CNTs via thermal evaporation. The Raman spectra confirm the graphitic order of as-grown pristine CNTs with RBM (radial breathing mode), D band and G band peaks at the 282 cm−1, 1347 cm−1 and 1594 cm−1 respectively. The peak at 471 cm−1 indicates successful attachment of MgO NPs to the CNTs. The enhanced field emission properties of CNTs were mainly attributed to the MgO NPs which increased the field enhancement factor and the density of emission sites. The decreased work function and increased field enhancement factor were responsible for the improved FE properties of the CNTs. Our results indicate that the MgO decorated CNTs can be used as an effective field emitter for various electron emission devices. The turn-on field decrease from 1.6 V/μm to 1.3 V/μm and the maximum current density increases from 1.581 to 3.678 mA/cm2 after the decoration of CNTs with MgO NPs. The value of field enhancement factor (β) also increases from 2.814×103 to 9.823×103.

Synthesis of a finger-like MoS2@VS2 micro–nanocomposite with enhanced field emission performance

CrystEngComm ◽  
2020 ◽  
Vol 22 (22) ◽  
pp. 3797-3803 ◽  
Author(s):  
Yu Feng ◽  
Erwei Du ◽  
Shijing Gong ◽  
Ke Yu ◽  
Xiaofan Chen ◽  
...  
Keyword(s):  
Field Emission ◽  
Emission Performance ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emission Performance

A MoS2@VS2 micro–nanocomposite showed enhanced field emission properties benefiting from the synergy of the two materials.

scholarly journals Morphology-controlled synthesis and electron field emission properties of ZnSe nanowalls

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 10631-10637 ◽  
Author(s):  
Pei Xie ◽  
Shaolin Xue ◽  
Youya Wang ◽  
Zhiyong Gao ◽  
Hange Feng ◽  
...  
Keyword(s):  
Field Emission ◽  
Electron Field Emission ◽  
Controlled Synthesis ◽  
Emission Performance ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Electron Field ◽  
Field Emission Performance ◽  
Electron Field Emission Properties

Novel ZnSe nanowalls on a Zn substrate with optimum morphology exhibit enhanced field emission performance.

Effect of distribution of field enhancement factor on field emission from cathode with a large number of emission sites

2005 ◽  
Vol 484 (1-2) ◽  
pp. 379-381 ◽  
Author(s):  
Guang Yuan ◽  
Hang Song ◽  
Yixin Jin ◽  
Hidenori Mimura ◽  
Kuniyoshi Yokoo
Keyword(s):  
Field Emission ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Field Enhancement Factor

scholarly journals Field enhancement factor and field emission from a hemi-ellipsoidal metallic needle

2009 ◽  
Vol 109 (4) ◽  
pp. 373-378 ◽  
Author(s):  
Evgeny G. Pogorelov ◽  
Alexander I. Zhbanov ◽  
Yia-Chung Chang
Keyword(s):  
Field Emission ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Field Enhancement Factor

scholarly journals Microconical Structure Formation and Field Emission From Atomically Heterogeneous Surfaces Created by Microwave Plasma–Based Low-Energy Ion Beams

2021 ◽  
Vol 9 ◽  
Author(s):  
Jayashree Majumdar ◽  
Sudeep Bhattacharjee
Keyword(s):  
Work Function ◽  
Field Emission ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Ion Beams ◽  
Emission Current ◽  
Force Microscopy ◽  
Field Emission Properties ◽  
Argon Ion ◽  
Local Work

We report the formation of self-organized microconical arrays on copper surface when exposed to high flux (5.4 × 1015 cm−2 s−1) of 2 keV argon ion beams at normal incidence. The created microconical arrays are explored for field emission properties. The surface morphologies are investigated by scanning electron microscopy and atomic force microscopy. The local work function variation is analyzed by Kelvin probe force microscopy, and the argon content in the irradiated layer is measured with X-ray Photoelectron Spectroscopy. The average aspect ratio (base width/height) of microstructures for individual irradiated samples is found to increase from 0.7 to 1.5 with a decrease in ion fluence. The ion concentration is highest (3.89 %) for a fluence of 4.7 × 1018 cm−2, which asserts the formation of atomically heterogeneous surface due to subsurface ion implantation. An enhancement in the field emission properties of the argon ion–treated copper substrates at a fluence of 4.7 × 1018 cm−2 with a low turn-on voltage of 2.33 kV and with electron emission current 0.5 nA has been observed. From the Fowler–Nordheim equations, the field enhancement factor is calculated to be 5,561 for pristine copper, which gets enhanced by a factor of 2–8 times for irradiated substrates. A parametric model is considered, by taking into account the modified local work function caused due to structural undulations of the microstructures and presence of implanted argon ions, for explaining the experimental results on the field enhancement factor and emission current.

Field Emission Site Densities of Nanostructured Carbon

2001 ◽  
Vol 675 ◽  
Author(s):  
J B Cui ◽  
J Robertson ◽  
W I Milne
Keyword(s):  
Field Emission ◽  
Applied Field ◽  
Enhancement Factor ◽  
Field Enhancement ◽  
Carbon Films ◽  
Vacuum Arc ◽  
Nanostructured Carbon ◽  
Field Emission Properties ◽  
Site Density ◽  
Enhancement Factors

ABSTRACTThe field emission properties of nanostructured carbon films deposited by cathodic vacuum arc in a He atmosphere have been studied by measuring the emission currents and the emission site density. The films have an onset field of ∼3 V/μm. The emission site density is viewed on a phosphor anode and it increases rapidly with applied field. It is assumed that the emission occurs from surface regions with a range of field enhancement factors but with a constant work function. The field enhancement factor is found to have an exponential distribution.

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