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Influence of gamma irradiation on electrophysical properties of onion-like carbon

A. I. ROMANENKO1,2,* , O. B. ANIKEEVA1,2, V. L. KUZNETSOV2,3, T. I. BURYAKOV1,2, E. N. TKACHEV1,2, S. I. MOSEENKOV2,3, A. V. ARZHANNIKOV2,4

Affiliation

  1. Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Science, Novosibirsk, Russia
  2. Novosibirsk State University, Novosibirsk, Russia
  3. Boreskov Institute of Catalysis Siberian Branch of Russian Academy of Science, Novosibirsk, Russia
  4. Budker Institute of Nuclear Physics Siberian Branch of Russian Academy of Science, Novosibirsk, Russia

Abstract

Temperature dependence of the conductivity of onion-like carbon (OLC) was investigated before and after gamma irradiation. It is found that the temperature dependence of the conductivity is described by the mechanism of variable range hopping conductivity (VRHC). The density of states on Fermi level N(EF) is estimated on slope angle of curves σ(T) in coordinates ln[σ(T)/σ293] – T -1/2. The gamma irradiation leads to the increase N(EF) for OLC prepared by vacuum annealing of nanodiamond (ND) particles at temperatures 1400 K, 1650 K and to the decrease N(EF) for OLC produced by the annealing ND at temperatures 1850 K..

Keywords

Onion-like carbon, Gamma irradiation, Conductivity.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

A. I. ROMANENKO, O. B. ANIKEEVA, V. L. KUZNETSOV, T. I. BURYAKOV, E. N. TKACHEV, S. I. MOSEENKOV, A. V. ARZHANNIKOV, Influence of gamma irradiation on electrophysical properties of onion-like carbon, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1745-1748 (2008)