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Recent Advances in Synthesis and Characterization of SWCNTs Produced by Laser Oven ProcessResults from the parametric study of the two-laser oven process indicated possible improvements with flow conditions and laser characteristics. Higher flow rates, lower operating pressures coupled with changes in flow tube material are found to improve the nanotube yields. The collected nanotube material is analyzed using a combination of characterization techniques including SEM, TEM, TGA, Raman and UV-VIS-NIR to estimate the purity of the samples. In-situ diagnostics of the laser oven process is now extended to include the surface temperature of the target material. Spectral emission from the target surface is compared with black body type emission to estimate the temperature. The surface temperature seemed to correlate well with the ablation rate as well as the quality of the SWCNTs. Recent changes in improving the production rate by rastering the target and using cw laser will be presented.
Document ID
20050220666
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Aepalli, Sivaram
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 23, 2013
Publication Date
June 14, 2004
Subject Category
Lasers And Masers
Meeting Information
Meeting: NT04 International Conference on the Science and Application of Nanotubes
Location: San Luis Potosi, Mexico
Country: Mexico
Start Date: July 19, 2004
End Date: July 24, 2004
Funding Number(s)
CONTRACT_GRANT: NAS9-19100
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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