|
|||||
|
|
Percolation model of an insulator-conductor transition in ultrananocrystalline diamond films |
|
| Authors: | I. I. Vlasov M. V. Kanzyuba A. A. Shiryaev V. V. Volkov V. G. Ral’chenko V. I. Konov |
| Affiliation: | 1.Prokhorov General Physics Institute,Russian Academy of Sciences,Moscow,Russia;2.Frumkin Institute of Physical Chemistry and Electrochemistry,Russian Academy of Sciences,Moscow,Russia;3.Shubnikov Institute of Crystallography,Russian Academy of Sciences,Moscow,Russia |
| Abstract: | A percolation model has been proposed to explain an insulator-conductor transition in ultrananocrystalline diamond films upon addition of nitrogen to a gas mixture used to synthesize films. An observed jump of the conductivity by 10–12 orders of magnitude is a result of the rearrangement of the structure of films leading to the formation of diamond nanorods in a graphite shell. A nitriding-induced increase in the volume fraction of these nanorods (up to 0.22) has been determined from small-angle X-ray scattering data. Conduction occurs through graphite shells and the percolation threshold corresponds to the volume fraction of conducting nanorods of 0.06. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |