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Title: Micro glow plasma for localized nanostructural modification of carbon nanotube forest

Abstract

This paper reports the localized selective treatment of vertically aligned carbon nanotubes, or CNT forests, for radial size modification of the nanotubes through a micro-scale glow plasma established on the material. An atmospheric-pressure DC glow plasma is shown to be stably sustained on the surface of the CNT forest in argon using micromachined tungsten electrodes with diameters down to 100 μm. Experiments reveal thinning or thickening of the nanotubes under the micro glow depending on the process conditions including discharge current and process time. These thinning and thickening effects in the treated nanotubes are measured to be up to ∼30% and ∼300% in their diameter, respectively, under the tested conditions. The elemental and Raman analyses suggest that the treated region of the CNT forest is pure carbon and maintains a degree of crystallinity. The local plasma treatment process investigated may allow modification of material characteristics in different domains for targeted regions or patterns, potentially aiding custom design of micro-electro-mechanical systems and other emerging devices enabled by the CNT forest.

Authors:
; ; ; ;  [1]
  1. University of British Columbia, Vancouver, British Columbia V6T 1Z4 (Canada)
Publication Date:
OSTI Identifier:
22590479
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ARGON; ATMOSPHERIC PRESSURE; CARBON NANOTUBES; CURRENTS; DESIGN; ELECTRODES; EQUIPMENT; MODIFICATIONS; PLASMA; POTENTIALS; SURFACES; TUNGSTEN

Citation Formats

Sarwar, Mirza Saquib us, Xiao, Zhiming, Saleh, Tanveer, Nojeh, Alireza, and Takahata, Kenichi. Micro glow plasma for localized nanostructural modification of carbon nanotube forest. United States: N. p., 2016. Web. doi:10.1063/1.4961629.
Sarwar, Mirza Saquib us, Xiao, Zhiming, Saleh, Tanveer, Nojeh, Alireza, & Takahata, Kenichi. Micro glow plasma for localized nanostructural modification of carbon nanotube forest. United States. doi:10.1063/1.4961629.
Sarwar, Mirza Saquib us, Xiao, Zhiming, Saleh, Tanveer, Nojeh, Alireza, and Takahata, Kenichi. Mon . "Micro glow plasma for localized nanostructural modification of carbon nanotube forest". United States. doi:10.1063/1.4961629.
@article{osti_22590479,
title = {Micro glow plasma for localized nanostructural modification of carbon nanotube forest},
author = {Sarwar, Mirza Saquib us and Xiao, Zhiming and Saleh, Tanveer and Nojeh, Alireza and Takahata, Kenichi},
abstractNote = {This paper reports the localized selective treatment of vertically aligned carbon nanotubes, or CNT forests, for radial size modification of the nanotubes through a micro-scale glow plasma established on the material. An atmospheric-pressure DC glow plasma is shown to be stably sustained on the surface of the CNT forest in argon using micromachined tungsten electrodes with diameters down to 100 μm. Experiments reveal thinning or thickening of the nanotubes under the micro glow depending on the process conditions including discharge current and process time. These thinning and thickening effects in the treated nanotubes are measured to be up to ∼30% and ∼300% in their diameter, respectively, under the tested conditions. The elemental and Raman analyses suggest that the treated region of the CNT forest is pure carbon and maintains a degree of crystallinity. The local plasma treatment process investigated may allow modification of material characteristics in different domains for targeted regions or patterns, potentially aiding custom design of micro-electro-mechanical systems and other emerging devices enabled by the CNT forest.},
doi = {10.1063/1.4961629},
journal = {Applied Physics Letters},
number = 8,
volume = 109,
place = {United States},
year = {Mon Aug 22 00:00:00 EDT 2016},
month = {Mon Aug 22 00:00:00 EDT 2016}
}