TITLE

Morphological variation of multiwall carbon nanotubes in supercritical water oxidation

AUTHOR(S)
Jia-Yaw Chang; Bertrand Lo; Meili Jeng; Shin-Hwa Tzing; Yong-Chien Ling
PUB. DATE
September 2004
SOURCE
Applied Physics Letters;9/27/2004, Vol. 85 Issue 13, p2613
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Multiwall carbon nanotubes (MWNTs) with different morphology were prepared using supercritical water (SCW) oxidation and investigated by transmission electron microscope (TEM) and electron energy-loss spectroscopy (EELS). TEM results indicate that the peeling and sharpening of MWNTs are influenced by the etching process in SCW oxidation, of which oxidation time and amount of oxygen treed is crucial. A simplified etching model is proposed, which indicates that the difference of mean etching rate between two adjoining blocks causes the morphological variation of MWNTs. The EELS results show charge in characteristic energy-loss peaks as a function of total shell numbers along longitudinal axis of individual peeled tube.
ACCESSION #
14546584

 

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