Optical band gap, local work function and field emission properties of MBE grown β-MoO3 nanoribbons

2019 ◽  
Vol 476 ◽  
pp. 691-700 ◽  
Author(s):  
Paramita Maiti ◽  
Puspendu Guha ◽  
Ranveer Singh ◽  
Jatis Kumar Dash ◽  
Parlapalli V. Satyam
Keyword(s):  
Work Function ◽  
Band Gap ◽  
Field Emission ◽  
Optical Band Gap ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Local Work

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.

Low work function CsI coatings for enhanced field emission properties

2011 ◽  
Vol 29 (3) ◽  
pp. 031402 ◽  
Author(s):  
S. B. Fairchild ◽  
T. C. Back ◽  
P. T. Murray ◽  
M. M. Cahay ◽  
D. A. Shiffler
Keyword(s):  
Work Function ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties

scholarly journals Effect of irregularities in the work function and field emission properties of metals

2010 ◽  
Vol 108 (11) ◽  
pp. 114512 ◽  
Author(s):  
Thiago A. de Assis ◽  
R. F. S. Andrade ◽  
C. M. C. de Castilho ◽  
J. C. Losada ◽  
Rosa M. Benito ◽  
...  
Keyword(s):  
Work Function ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties

Highly efficient field emission from ZnO nanorods and nanographene hybrids on a macroporous electric conductive network

2017 ◽  
Vol 5 (36) ◽  
pp. 9296-9305 ◽  
Author(s):  
Chi Zhang ◽  
Dajun Wu ◽  
Xin Tong ◽  
Yiping Zhu ◽  
Shaohui Xu ◽  
...  
Keyword(s):  
Work Function ◽  
Field Emission ◽  
Zno Nanorods ◽  
Hybrid Structure ◽  
Conductive Network ◽  
Emission Properties ◽  
Patterned Substrate ◽  
Field Emission Properties ◽  
Highly Efficient

A hybrid structure comprising ZnO nanorods and nanographene on a patterned substrate enhances the field emission properties by reducing the work function and avoiding electrostatic screening.

Enhanced Field Emission Properties of Carbon Nanotube Based Field Emitters by Dynamic Oxidation

2013 ◽  
Vol 9 (5) ◽  
pp. 619-623 ◽  
Author(s):  
Shama Parveen ◽  
Samina Husain ◽  
Avshish Kumar ◽  
Javid Ali ◽  
Mubashshir Husain ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emitters ◽  
Dynamic Oxidation
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