Journal of Superconductivity

, Volume 8, Issue 1, pp 5–8 | Cite as

Electrochemical doping of alkali metals into C60 thin film

  • N. Yoshiyama
  • H. Endo
  • H. Yamamoto
Article

Abstract

The electrochemical properties of an evaporated C60 film were studied by voltammetry in organic electrolyte solution. Four reversible reduction waves were observed, corresponding to the formation of alkali metal salts of fullerene, A x C60 (A∶ Li, K, Rb,x=1, 2, 3, 4). The voltammograms observed for each cation species were compared and discussed in relation to the cation radius. The change of optical density spectrum by the redox reactions was measured in the wavelength range of visible light. The resistivity of a C60 film protected by a polyimide film decreased rapidly by four orders of magnitude after the electrochemical doping of potassium ions.

Key words

C60 film alkali metal voltammetry electrochemical doping 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. F. Hebard, M. J. Rosseinsky, and R. C. Haddon,Nature (London) 350, 600 (1991).Google Scholar
  2. 2.
    R. E. Haufler, J. Conceicao, and L. P. F. Chibante,J. Phys. Chem. 94, 8634 (1990).Google Scholar
  3. 3.
    P.-M. Allemand, A. Koch, and F. Wudl,J. Am. Chem. Soc. 113, 1050 (1991).Google Scholar
  4. 4.
    Qinghan Xieet al., Am. Chem. Soc. 114, 3978 (1992).Google Scholar
  5. 5.
    L. J. Wilsonet al., inWorld Congress on Superconductivity, K. Krishen and C. G. Burnham, eds. (Pergamon Press, Oxford, 1993), pp. 913–923.Google Scholar
  6. 6.
    Y. Chabreet al., J. Am. Chem. Soc. 114, 765 (1992).Google Scholar
  7. 7.
    H. Arakiet al., Jpn. J. Appl. Phys. 32, L498 (1993).Google Scholar
  8. 8.
    K. Kaneto, inFullerene Science and Technology (to be published).Google Scholar
  9. 9.
    N. Yoshiyama, H. Yamamoto, and M. Tanaka, inWorld Congress on Superconductivity, K. Krishen and C. G. Burnham, eds. (Pergamon Press, Oxford, 1993), pp. 879–882.Google Scholar
  10. 10.
    S. J. Ducloset al., Nature (London) 351, 380 (1991).Google Scholar

Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • N. Yoshiyama
    • 1
  • H. Endo
    • 1
  • H. Yamamoto
    • 1
  1. 1.College of Science and TechnologyNihon UniversityChibaJapan

Personalised recommendations