Document Detail

Revealing the Impact of Catalyst Phase Transition on Carbon Nanotube Growth by In Situ Raman Spectroscopy.
MedLine Citation:
PMID:  23343776     Owner:  NLM     Status:  Publisher    
The physical state of the catalyst and its impact on the growth of single-walled carbon nanotubes (SWNTs) is the subject of a long-standing debate. We addressed it here using in situ Raman spectroscopy to measure Fe and Ni catalyst lifetimes during the growth of individual SWNTs across a wide range of temperatures (500 - 1400 ºC). The temperature dependence of the Fe catalyst lifetimes underwent a sharp increase around 1100 ºC due to a solid to liquid phase transition. By comparing experimental results with the metal-carbon phase diagrams, we prove that SWNTs can grow from solid and liquid phase-catalysts, depending on the temperature.
Rahul Rao; Neal Pierce; David Liptak; Daylond Hooper; Gordon Sargent; Sl Semaitin; Stefano Curtarolo; Avetik R Harutyunyan; Benji Maruyama
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-24
Journal Detail:
Title:  ACS nano     Volume:  -     ISSN:  1936-086X     ISO Abbreviation:  ACS Nano     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101313589     Medline TA:  ACS Nano     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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