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The structure of copper-doped amorphous hydrogenated carbon films
Authors:T N Vasilevskaya  N S Andreev  I A Drozdova  V N Filipovich  S G Yastrebov  T K Zvonareva
Institution:(1) I. V. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, 199155 St. Petersburg, Russia;(2) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
Abstract:A study of the nanostructure of a-C:H:Cu films by x-ray small-angle scattering, x-ray diffraction, TEM, and visible and UV spectroscopy is reported. It has been established that introduction of 9–16 at.% Cu not only decorates the original carbon fragments but produces extended (up to 4 μm in length) formations of copper-decorated strongly elongated ellipses as well. At 14–16 at.% Cu, these linear clusters represent copper nanotubes with a core made up of the original ellipses drawn in a line. It is these conducting copper formations that account primarily for the strong increase in conductivity at 12–16 at.% Cu contents in a-C:H films. Fiz. Tverd. Tela (St. Petersburg) 41, 2088–2096 (November 1999)
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