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Growth of Carbon Nanostructure Materials Using Laser VaporizationSince the potential applications of carbon nanotubes (CNT) was discovered in many fields, such as non-structure electronics, lightweight composite structure, and drug delivery, CNT has been grown by many techniques in which high yield single wall CNT has been produced by physical processes including arc vaporization and laser vaporization. In this presentation, the growth mechanism of the carbon nanostructure materials by laser vaporization is to be discussed. Carbon nanoparticles and nanotubes have been synthesized using pulsed laser vaporization on Si substrates in various temperatures and pressures. Two kinds of targets were used to grow the nanostructure materials. One was a pure graphite target and the other one contained Ni and Co catalysts. The growth temperatures were 600-1000 C and the pressures varied from several torr to 500 torr. Carbon nanoparticles were observed when a graphite target was used, although catalysts were deposited on substrates before growing carbon films. When the target contains catalysts, carbon nanotubes (CNT) are obtained. The CNT were characterized by scanning electron microscopy, x-ray diffraction, optical absorption and transmission, and Raman spectroscopy. The temperature-and pressure-dependencies of carbon nanotubes' growth rate and size were investigated.
Document ID
20000072881
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Zhu, Shen
(Universities Space Research Association Huntsville, AL United States)
Su, Ching-Hua
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lehozeky, S.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Composite Materials
Meeting Information
Meeting: 11th European Conference on Diamond, Diamond-like Materials, Carbon Nanotubes, Nitrides and Silicon: Diamond 2000
Location: Porto
Country: Portugal
Start Date: September 3, 2000
End Date: September 8, 2000
Sponsors: Elsevier Science Publishers
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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