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A parametric study of single-wall carbon nanotube growth by laser ablationResults of a parametric study of carbon nanotube production by the double-pulse laser oven process are presented. The effect of various operating parameters on the production of single-wall carbon nanotubes (SWCNTs) is estimated by characterizing the nanotube material using analytical techniques, including scanning electron microscopy, transmission electron microscopy, thermo gravimetric analysis and Raman spectroscopy. The study included changing the sequence of the laser pulses, laser energy, pulse separation, type of buffer gas used, operating pressure, flow rate, inner tube diameter, as well as its material, and oven temperature. It was found that the material quality and quantity improve with deviation from normal operation parameters such as laser energy density higher than 1.5 J/cm2, pressure lower than 67 kPa, and flow rates higher than 100 sccm. Use of helium produced mainly small diameter tubes and a lower yield. The diameter of SWCNTs decreases with decreasing oven temperature and lower flow rates.
Document ID
20050148716
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Arepalli, Sivaram
(NASA Johnson Space Center Houston, TX United States)
Holmes, William A.
Nikolaev, Pavel
Hadjiev, Victor G.
Scott, Carl D.
Date Acquired
August 23, 2013
Publication Date
September 1, 2004
Publication Information
Publication: Journal of nanoscience and nanotechnology
Volume: 4
Issue: 7
ISSN: 1533-4880
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other

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