Investigation of carbon nanotube growth termination mechanism by in-situ transmission electron microscopy approaches

Kim， Seung Min (김승민); Hwan Chul Kim (김환철); 정세종

Investigation of carbon nanotube growth termination mechanism by in-situ transmission electron microscopy approaches

Carbon Letters
Abbr : Carbon Lett.
2013, 14(4), pp.228-233
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Kim， Seung Min ¹, Hwan Chul Kim ², 정세종 ²

¹한국과학기술연구원
²전북대학교

Accredited

ABSTRACT

In this work, we report in-situ observations of changes in catalyst morphology, and of growth termination of individual carbon nanotubes (CNTs), by complete loss of the catalyst particle attached to it. The observations strongly support the growth-termination mechanism of CNT forests or carpets by dynamic morphological evolution of catalyst particles induced by Ostwald ripening, and sub-surface diffusion. We show that in the tip-growth mode, as well as in the base-growth mode, the growth termination of CNT by dissolution of catalyst particles is plausible. This may allow the growth termination mechanism by evolution of catalyst morphology to be applicable to not only CNT forest growth, but also to other growth methods (for example, floating-catalyst chemical vapor deposition), which do not use any supporting layer or substrate beneath a catalyst layer.

KEYWORDS

carbon nanotubes, growth termination, catalyst morphology, in-situ transmission electron microscope, tip-growth mode

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Total Citation Counts(KCI+WOS) (4) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 4.82