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Metal-on-Metal Heteroepitaxy and the Influence of a Surfactant: Cu/O/Ru(0001)

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Surface Science

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Abstract

Cu-on-Ru(OOOl) has been a suitable model system for metal-on-metal heteroepitaxy for many years because of the immiscibility of the two components. In contrast to most ex-situ studies the present work emphasizes dynamical work function change (ΔØ) measurements using a special KELVIN-capacitor probe as being a sensitive method to monitor the film morphology in-situ , that is during film growth. In particular, it is demonstrated that preadsorbed oxygen on the Ru(0001) substrate permanently “floats out” to the Cu surface and acts as a surfactant for layer-by- layer growth at a temperature of 400 K, at which in the absence of oxygen non-ergodic growth leads to the formation of pyramidal clusters and, hence, a very rough film. The mechanistic influence of the surfactant oxygen is discussed in detail and may certainly be carried over to other metal-on-metal systems.

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Authors and Affiliations

  1. Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstr. 12, D-53115, Bonn, Germany

    H. Wolter, M. Schmidt, M. Nohlen & K. Wandelt

Authors
  1. H. Wolter
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  2. M. Schmidt
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  3. M. Nohlen
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  4. K. Wandelt
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Editor information

Editors and Affiliations

  1. University of Newcastle, Callaghan, NSW, 2308, Australia

    R. J. MacDonald

  2. Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748, Garching, Germany

    E. C. Taglauer

  3. Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstr. 12, D-53115, Bonn, Germany

    K. R. Wandelt

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© 1996 Springer-Verlag Berlin Heidelberg

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Wolter, H., Schmidt, M., Nohlen, M., Wandelt, K. (1996). Metal-on-Metal Heteroepitaxy and the Influence of a Surfactant: Cu/O/Ru(0001). In: MacDonald, R.J., Taglauer, E.C., Wandelt, K.R. (eds) Surface Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80281-2_19

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  • DOI: https://doi.org/10.1007/978-3-642-80281-2_19

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-80283-6

  • Online ISBN: 978-3-642-80281-2

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