Growth of nanocomposite films from accelerated C 60 ions

A beam of accelerated C 60 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...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2012-08, Vol.45 (33), p.335302
Main Authors: Pukha, V E, Zubarev, E N, Drozdov, A N, Pugachov, A T, Jeong, S H, Nam, S C
Format: Article
Language:English
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Summary:A beam of accelerated C 60 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 sp 2 bonds dominate in the films. The percentage of sp 3 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