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Carbon Nanotubes Grown By CVD in Various ConditionsSince the superior properties of multi-wall carbon nanotubes (MWCNT) could be used in numerous devices such as electronics and sensors, many efforts have been engaged in synthesizing particular structural or dimensional MWCNT. This presentation will illustrate MWCNT synthesized on silicon substrates by thermal CVD. On the substrate, an array of catalysts is coated using sputtering deposition. A thin Ti buffer layer is also coated on some Si substrates prior to depositing catalyst particles. Nickel, cobalt or iron transition metals are used as catalysts for the MWCNT growth. Since the diameter of MWCNT depends on the size of catalyst particles, the catalyst particle size is investigated after annealed at various temperatures. MWCNT are grown on the substrate in the temperature range of 700 to 1000 C and the pressure range of 100 torr to one atmosphere. Methane and hydrogen gases with methane content of 10% to 100% are used for the MWCNT synthesis. Morphology, length and diameter of these MWCNT are determined by scanning electron microscopy and Raman spectroscopy. The detailed results of syntheses and characterizations will be discussed in the presentation.
Document ID
20010040760
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Zhu, S.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Su, C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Cochrane, J. C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lehoczky. S. L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Muntele, I.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Ila, D.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Rose, M. Franklin
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Solid-State Physics
Meeting Information
Meeting: ICCG
Location: Kyoto
Country: Japan
Start Date: July 30, 2001
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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