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Submonolayer-Deposition of Mass-Selected Au+ and Au +n (n = 3 and 7) on HOPG and Amorphous Carbon

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Abstract

Ions of gold monomer and clusters emitted from a liquid metal ion source were mass-selected, and deposited on cleaved HOPG (highly oriented pyrolytic graphite) surfaces and on amorphous carbon thin films at room temperature with the impinging energy E i from 0 to 500 eV. The coverage of deposited ions were 1/100 and 1/1000 monolayers on HOPG surfaces and 1/3 monolayers on carbon films. Scanning tunneling microscopy of the HOPG surfaces deposited with low impinging energy (E i<50 eV) revealed that large clusters with diameters ranging from 2 to 5 nm and height of 1–2 layers were present instead of isolated monomers and original clusters. When E i was higher than 100 eV, HOPG surfaces were damaged and only bumpy surfaces were observed by STM. Transmission electron microscopy of Au+-deposited carbon films showed the formation of clusters with diameter 0.5–20 nm, depending on the E i and the time elapsed after deposition.

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Authors and Affiliations

  1. Department of Electrical and Electronic Engineering, Mie University, Tsu, 514, Japan

    Y. Saito, K. Murata, K. Hamaguchi & H. Fujita

  2. Department of Mechanical Engineering, Mie University, Tsu, 514, Japan

    S. Kotake, Y. Suzuki & M. Senoo

  3. Institute of Material Research, Tohoku University, Sendai, 980, Japan

    C.-W. Hu, A. Kasuya & Y. Nishina

Authors
  1. Y. Saito
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  2. K. Murata
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  3. K. Hamaguchi
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  4. H. Fujita
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  5. S. Kotake
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  6. Y. Suzuki
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  7. M. Senoo
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  8. C.-W. Hu
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  9. A. Kasuya
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  10. Y. Nishina
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Saito, Y., Murata, K., Hamaguchi, K. et al. Submonolayer-Deposition of Mass-Selected Au+ and Au +n (n = 3 and 7) on HOPG and Amorphous Carbon. Journal of Cluster Science 9, 123–130 (1998). https://doi.org/10.1023/A:1021985815136

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  • DOI: https://doi.org/10.1023/A:1021985815136

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