In situ time-resolved measurements of carbon nanotube and nanohorn growth

Journal Article · Sun Dec 31 23:00:00 EST 2006 · Physica Status Solidi B

DOI:https://doi.org/10.1002/pssb.200776204· OSTI ID:1018568

Geohegan, David B ^[1]; Puretzky, Alexander A ^[1]; Styers-Barnett, David J ^[1]; Hu, Hui ^[1]; Zhao, Bin ^[1]; Cui, Hongtao ^[1]; Rouleau, Christopher M ^[1]; Eres, Gyula ^[1]; Jackson, Jeremy Joseph ^[1]; Wood, Richard F ^[1]; Pannala, Sreekanth ^[1]; Wells, Jack C ^[1]

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1. ORNL

Growth mechanisms of carbon nanotubes are investigated and compared for both high- and low-temperature synthesis methods through experiments utilizing time-resolved, in situ imaging and spectros-copy. High-speed videography and pyrometry measured the timeframes for growth for single-wall car-bon nanotubes (SWNTs) and nanohorns (SWNHs) by laser vaporization (LV) at 1150 C, revealing that C can self-assemble at high temperatures preferentially into SWNH structures without catalyst assistance at rates comparable to catalyst-assisted SWNT growth by either laser vaporization or chemical vapor depo-sition (CVD). Laser interferometry and videography reveal the coordinated growth of vertically-aligned nanotube arrays (VANTAs) by CVD at 550-900 C.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE); SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1018568
• Journal Information: Physica Status Solidi B, Journal Name: Physica Status Solidi B Journal Issue: 11 Vol. 244; ISSN 0370-1972
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
CATALYSTS
CHEMICAL VAPOR DEPOSITION
EVAPORATION
INTERFEROMETRY
LASERS
NANOTUBES
SPECTROSCOPY
SYNTHESIS
Single-wall carbon nanotubes
growth mechanisms
in situ diagnostics.