Title: Diameter-dependent elastic modulus supports the metastable-catalyst growth of carbon nanotubes
Authors: Lee, Kyumin ×
Lukic, Branimir
Magrez, Arnaud
Seo, Jin Won
Briggs, G. Andrew D.
Kulik, Andrzej J.
Forro, Laszlo #
Issue Date: Jun-2007
Publisher: Amer chemical soc
Series Title: Nano Letters vol:7 issue:6 pages:1598-1602
Abstract: We measured the elastic modulus of individual multiwalled carbon nanotubes (MWCNTs) grown by catalytic chemical vapor deposition (CVD) over a broad diameter range (10-25 nm). Alternating current (ac) dielectrophoresis was used for efficient tube deposition, and atomic force microscope (AFM) force-displacement curve technique was used for stiffness measurements. The elastic modulus exhibits a strong diameter dependence, showing a difference of nearly 2 orders of magnitude in the 10-20 nm diameter range (thinner MWCNTs have higher elastic modulus). Our results support the metastable-catalyst model in which the catalyst's molten skin plays a key role.
ISSN: 1530-6984
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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