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

Journal Article · Mon Jan 01 00:00:00 EST 2007 · 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 Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1018568
• Journal Information: Physica Status Solidi B, Vol. 244, Issue 11; 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.