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Title: Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip

Abstract

The role of negatively charged ions in plasma on growth (without catalyst) and field emission properties of spherical carbon nanotube (CNT) tip has been theoretically investigated. A theoretical model of charge neutrality, including the kinetics of electrons, negatively and positively charged ions, neutral atoms, and the energy balance of various species has been developed. Numerical calculations of the spherical CNT tip radius for different relative density of negatively charged ions {epsilon}{sub r}(=n{sub SF{sub 6{sup -}}}/n{sub C{sup +}}, where n{sub SF{sub 6{sup -}}} and n{sub C}{sup +} are the equilibrium densities of sulphur hexafluoride and carbon ions, respectively) have been carried out for the typical glow discharge plasma parameters. It is found that the spherical CNT tip radius decreases with {epsilon}{sub r} and hence the field emission of electrons from the spherical CNT tip increases. Some of our theoretical results are in accordance with the existing experimental observations.

Authors:
; ;  [1]
  1. Department of Physics, Maharaja Agrasen Institute of Technology, Sector-22, Rohini, Delhi-110086 (India)
Publication Date:
OSTI Identifier:
22043610
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 19; Journal Issue: 1; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; ATOMS; CARBON; CARBON IONS; CATALYSTS; DENSITY; EQUILIBRIUM; FIELD EMISSION; GLOW DISCHARGES; NANOTUBES; NUMERICAL ANALYSIS; PLASMA; PLASMA DENSITY; PLASMA SIMULATION; PROCESSING; SPHERICAL CONFIGURATION; SULFUR; SULFUR FLUORIDES

Citation Formats

Tewari, Aarti, Walia, Ritu, and Sharma, Suresh C. Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip. United States: N. p., 2012. Web. doi:10.1063/1.3671968.
Tewari, Aarti, Walia, Ritu, & Sharma, Suresh C. Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip. United States. https://doi.org/10.1063/1.3671968
Tewari, Aarti, Walia, Ritu, and Sharma, Suresh C. 2012. "Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip". United States. https://doi.org/10.1063/1.3671968.
@article{osti_22043610,
title = {Role of negatively charged ions in plasma on the growth and field emission properties of spherical carbon nanotube tip},
author = {Tewari, Aarti and Walia, Ritu and Sharma, Suresh C},
abstractNote = {The role of negatively charged ions in plasma on growth (without catalyst) and field emission properties of spherical carbon nanotube (CNT) tip has been theoretically investigated. A theoretical model of charge neutrality, including the kinetics of electrons, negatively and positively charged ions, neutral atoms, and the energy balance of various species has been developed. Numerical calculations of the spherical CNT tip radius for different relative density of negatively charged ions {epsilon}{sub r}(=n{sub SF{sub 6{sup -}}}/n{sub C{sup +}}, where n{sub SF{sub 6{sup -}}} and n{sub C}{sup +} are the equilibrium densities of sulphur hexafluoride and carbon ions, respectively) have been carried out for the typical glow discharge plasma parameters. It is found that the spherical CNT tip radius decreases with {epsilon}{sub r} and hence the field emission of electrons from the spherical CNT tip increases. Some of our theoretical results are in accordance with the existing experimental observations.},
doi = {10.1063/1.3671968},
url = {https://www.osti.gov/biblio/22043610}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 1,
volume = 19,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2012},
month = {Sun Jan 15 00:00:00 EST 2012}
}