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In situ time‐resolved measurements of carbon nanotube and nanohorn growth
Author(s) -
Geohegan D. B.,
Puretzky A. A.,
StyersBarnett D.,
Hu H.,
Zhao B.,
Cui H.,
Rouleau C. M.,
Eres G.,
Jackson J. J.,
Wood R. F.,
Pannala S.,
Wells J. C.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200776204
Subject(s) - carbon nanotube , pyrometer , materials science , vaporization , laser vaporization , videography , chemical vapor deposition , in situ , nanotechnology , chemical engineering , laser , carbon fibers , spectroscopy , interferometry , catalysis , optics , chemistry , composite material , temperature measurement , organic chemistry , physics , engineering , quantum mechanics , composite number , advertising , business
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 spectroscopy. High‐speed videography and pyrometry measured the timeframes for growth for single‐wall carbon 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 deposition (CVD). Laser interferometry and videography reveal the coordinated growth of vertically‐aligned nanotube arrays (VANTAs) by CVD at 550–900 °C. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)