Growth of nanocomposite films from accelerated C60 ions

A beam of accelerated C60 ions is used to deposit superhard (∼50 GPa) carbon films that exhibit high index plasticity (∼0.13-0.14) and high conductivity (up to 3000 S m−1). Transmission electron microscopy, Raman spectroscopy and x-ray photoelectron spectroscopy are subsequently used to study the mi...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2012-08, Vol.45 (33)
Main Authors: Pukha, V E, Zubarev, E N, Drozdov, A N, Pugachov, A T, Jeong, S H, Nam, S C
Format: Article
Language:English
Subjects:
Carbon Films
Graphite Nanocrystals
Ions
Nanocomposite
Texture
Online Access:Get full text
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Summary:A beam of accelerated C60 ions is used to deposit superhard (∼50 GPa) carbon films that exhibit high index plasticity (∼0.13-0.14) and high conductivity (up to 3000 S m−1). Transmission electron microscopy, Raman spectroscopy and x-ray photoelectron spectroscopy are subsequently used to study the microstructure and bond character of the deposited films. The films consist of textured graphite nanocrystals and diamond-like amorphous carbon (DLC). The graphene plane of the nanocrystals is aligned perpendicular to the film surface. It is shown that sp2 bonds dominate in the films. The percentage of sp3 bonds depends on the ion energy and the substrate temperature, and does not exceed 40%. The obtained results suggest that a new nanocomposite material consisting of oriented graphite nanocrystals reinforced by a DLC matrix is synthesized. A simple model is proposed to correlate the excellent mechanical properties with the observed structure.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/45/33/335302