Comparison of catalytically grown and arc-discharge carbon nanotube tips

Thie⁁n-Nga, Le⁁; Bonard, Jean-Marc; Ga´al, Richard; Forro´, La´szlo´; Hernadi, Klara
February 2002
Applied Physics Letters;2/4/2002, Vol. 80 Issue 5, p850
Academic Journal
We have performed a detailed transmission electron microscopy study of the tip of carbon nanotubes prepared by chemical vapor deposition (CVD) and by arc discharge. We found that a large proportion of the CVD-grown tubes have well-formed caps but that the graphitization of the walls is far from perfect. The tip shapes are also more rounded and the tip radius is higher when compared to arc-discharge tube tips. These features are discussed in relation with the growth mechanism and with the consequences they might have for applications in scanning probe microscopies. © 2002 American Institute of Physics.


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