Structural peculiarities of carbon nanolayers prepared by deposition from a gaseous phase on Ni
The surface structure and the mechanical and electrical properties of graphite nanolayers (1–2 nm thick) obtained by the carbon deposition from a gaseous phase on a Ni surface were studied using atomic-force microscopy (AFM). The surface of the nanolayers contains a dense network of line ridges with transverse sizes of several nanometers to several tens of nanometers and with the length of linear segments up to 1–2 μm. The AFM studies permit the conclusion that the observed ridges are mainly formed from carbon nanotubes or nanofilaments. They differ from planar areas of the graphite layer by substantially higher local electric conductivity in the contact with an AFM probe. The formation of ridges on certain portions of the surface may be due to thermal deformation wrinkles of graphite nanolayers that arise on cooling to room temperature.
PACS numbers68.55.J- 68.37.Ps
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