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Mass spectrometric characterization of iron clusters produced by laser pyrolysis and photolysis of Fe(CO)5 in a flow reactor

  • F. Huisken
  • B. Kohn
  • R. Alexandrescu
  • I. Morjan
Conference paper

Abstract

Laser-induced decomposition of iron pentacarbonyl in a flow reactor has been used to produce iron clusters and nanoparticles. The as-synthesized species are extracted from the reaction zone by a conical nozzle and expanded into the source chamber of a cluster beam apparatus where, after having traversed a differential chamber, they are analyzed in situ with a time-of-flight mass spectrometer. Three different lasers have been employed to accomplish decarbonylation of the Fe(CO)5 molecules. A pulsed CO2 laser (λ = 10.6 μm) was used to excite a mixture of SF6 and Fe(CO)5 and to pyrolyze the iron pentacarbonyl. Laser photolysis was performed by directly dissociating the Fe(CO)5 molecules with UV radiation. For this purpose, we used the tripled (λ = 355 rim) and quadrupled (λ = 266 um) Nd:YAG laser as well as an ArF excimer laser (λ = 193 nm). The mass spectrometric analysis showed that only the Nd:YAG laser produced high purity iron clusters which were essentially free of contamination.

PACS

61.46.+w Clusters and nanoparticles 81.15.Gh Chemical vapor deposition 82.80.Ms Mass spectrometry 

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References

  1. 1.
    LM. Campbell: Catalysis at Surfaces (Chapman and Hall, London, New York 1988 )Google Scholar
  2. 2.
    S.C. Richtmeier, E.K, Parks, K. Liu, L,G, Pobo, S. J. Riley: J. Chem. Phys. 82. 3659 (1985)ADSGoogle Scholar
  3. 3.
    M.D. Niorse, M.E. Geusic, J.R. Heath, R.E. Smalley: J. Chem, Phys. 83, 2293, (1985)ADSCrossRefGoogle Scholar
  4. 4.
    D.M. Cox, K.C. Reichman, D.J. Trevor, A. Kaldor: J. Chem. Phys. 88, 11. 1 (1988)Google Scholar
  5. 5.
    E.H. Parks, G.C. Nieman, L.G. Pc.)bo, S. J. Riley: J. Chem. Phys. 88, 6260 (1988)ADSGoogle Scholar
  6. 6.
    P. Schnabel, M.P. Iriomi, K.G. Weil: J. Phys. Chern, 95, 9688 (1991)CrossRefGoogle Scholar
  7. 7.
    J. Conceicao, R.T. Laaksonen, L.-S. Wang, T. Guo, P. Nordlander, R.E. Smalley: Phys. Rev. B 51, 4668 (1995)ADSCrossRefGoogle Scholar
  8. 8.
    L.-S. Wang, FL-S. Cheng, J. Fan: J. Chem. Phys. 102, 9480 (1995)ADSCrossRefGoogle Scholar
  9. 9.
    Y. Sawada, Y. Kageyama, I’4. Iwata„A,. Tasaki: Jpn. J. A.ppl. Phys. 31, 3858 (1992)ADSGoogle Scholar
  10. 10.
    X.-X. Bi, B. Granguly, G.P. Huffman, F.E. Huggins, M. Endo, P.C. Ecklund: J. Mater. Res. 8, 1666 (1993)ADSCrossRefGoogle Scholar
  11. 11.
    T. Majima, R. Miyahara, K. Haneda, M. Takami: Jpn. J. Appl. Phys. 33, L223 (1994)ADSCrossRefGoogle Scholar
  12. 12.
    X.Q. Zhao, F. Zheng, Y. Liang, Z.Q. Ru, Y.B, Xu: Mater. Lett. 21, 285 (1994)Google Scholar
  13. 13.
    R. Alexandrescu, I. Morjan, A. Crunteanu, S. Cojocaru, S. Petcu, V. Teodorescu, F. Huisken, B. Kohn, M. Ehbrecht: Mater. Chem. Phys. 55, 115 (1998)Google Scholar
  14. 14.
    R. Alexandrescu: Appl. Surf. Sci. 106, 28 (1996)ADSCrossRefGoogle Scholar
  15. 15.
    M. Ehbrecht, H. Ferkel, V.V. Smirnov, O.M. Stelmakh, W. Zhang, F. Huisken: Rev. Sci. Instrum. 66, 3833 (1995)ADSCrossRefGoogle Scholar
  16. 16.
    M. Ehbrecht, vI. Faerber, F. Rohmund, V.V. Smirnov, O.M. Stelmakh, F. Huisken: Chem. Phys. Lett. 214. 34 (1993)ADSCrossRefGoogle Scholar
  17. 17.
    M. Ehbrecht, H. Ferkel, V.V. Smirnov, O.M. Stehnakh, W. Zhang, F. Huisken: Surf, Rev. Lett. 3, 807 (1996)CrossRefGoogle Scholar
  18. 18.
    M. Ehbrecht, F. Huisken: Phys. Rev. B 59, 2975 (1999)ADSCrossRefGoogle Scholar
  19. 19.
    M. Ehbrecht, B. Kohn, F. Huisken, M.A. Laguna, V. Paillard: Phys. Rev. B 56, 6958 (1997)ADSCrossRefGoogle Scholar
  20. 20.
    J.T. Yardley, B. Gitlin, G. Nathanson, A.M. Rosan: J. Chem. Phys. 74, 370 (1931)ADSCrossRefGoogle Scholar
  21. 21.
    J. Bokor, J. Zavelovich, C.K. Rhodes: J. Chem. Phys. 72, 965 (1980)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Italia 1999

Authors and Affiliations

  • F. Huisken
    • 1
  • B. Kohn
    • 1
  • R. Alexandrescu
    • 2
  • I. Morjan
    • 2
  1. 1.Max-Planck-Institut für StrömungsforschungGöttingenGermany
  2. 2.National Institute for LasersPlasma and Radiation PhysicsBucharestRomania

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