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

Autor:	David B. Geohegan, Alexander A. Puretzky, Jeremy Jackson, Jack C. Wells, Bin Zhao, David J Styers-Barnett, H. Cui, Sreekanth Pannala, R. F. Wood, Gyula Eres, Hui Hu, Christopher M. Rouleau
Rok vydání:	2007
Předmět:	Nanotube Materials science Evaporation chemistry.chemical_element Nanotechnology Chemical vapor deposition Carbon nanotube Condensed Matter Physics Laser Electronic Optical and Magnetic Materials law.invention Chemical engineering chemistry law Vaporization Carbon Pyrometer
Zdroj:	physica status solidi (b). 244:3944-3949
ISSN:	1521-3951 0370-1972
DOI:	10.1002/pssb.200776204
Popis:	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.
Databáze:	OpenAIRE
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