Electronic properties and structure of carbon nanocomposite films deposited from accelerated C sub(60) ion beam

By methods of scanning tunnelling microscopy and tunnelling spectroscopy the surface structure and electronic properties of carbon films deposited from the mass-separated beam of accelerated C sub(60) ions are studied. The main feature of the surface relief is the presence of quasi-periodic globular...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2013-12, Vol.46 (48), p.1-7
Main Authors: Pukha, V E, Karbovskii, V L, Drozdov, A N, Pugachov, A T
Format: Article
Language:English
Subjects:
Buckminsterfullerene
Carbon
Deposition
Diamonds
Electronic properties
Fullerenes
Nanostructure
Tunnelling
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Summary:By methods of scanning tunnelling microscopy and tunnelling spectroscopy the surface structure and electronic properties of carbon films deposited from the mass-separated beam of accelerated C sub(60) ions are studied. The main feature of the surface relief is the presence of quasi-periodic globular structures with characteristic sizes of 2-4 nm and a height of about 1 nm. They are lined up in straight rows and curved chains on the entire surface of the film with a typical scale of 3-4 nm. Tunnelling spectra show that the film consists of nanoscale regions with a wide band gap (4-4.6 eV, p-type conductivity) and regions of narrow band gap (1.3-1.8eV, n-type conductivity). The electronic properties of the surface layers are close to the diamond to a greater extent than the properties of the underlying layers. Transmission electron microscopy allowed attributing the wide band gap regions to amorphous diamond, and the narrow-gap regions to nanocrystals of graphite.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/46/48/485305