Structural deformation, melting point and lattice parameter studies of size selected silver clusters

  • I. ShyjumonEmail author
  • M. Gopinadhan
  • O. Ivanova
  • M. Quaas
  • H. Wulff
  • C. A. Helm
  • R. Hippler
Clusters and Nanostructures


Silver clusters have been produced by magnetron sputtering in a gas aggregation nanocluster source. Clusters are size selected using a quadrupole mass filter (3–8 nm) or by varying the aggregation tube length (9–20 nm) of the nanocluster source. Mass selected clusters are deposited on a Si(100) substrate at different bias voltages and are characterized by atomic force microscopy. We observe a significant flattening of clusters on the surface due to the increase of impact energy as a result of increasing substrate bias voltage. The behavior of lattice parameters for size selected clusters are investigated by X-ray diffraction. All measured lattice constants exhibit a tensile strain; it is found that the lattice constant slightly increases with increasing cluster size up to a size of 12 nm and then decreases. The melting temperature of deposited clusters is found to be size-dependent and significantly lower than for bulk material, in agreement with theoretical considerations.


Atomic Force Microscopy Lattice Constant Bias Voltage Impact Energy Tube Length 
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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Authors and Affiliations

  • I. Shyjumon
    • 1
    Email author
  • M. Gopinadhan
    • 1
  • O. Ivanova
    • 1
  • M. Quaas
    • 2
  • H. Wulff
    • 2
  • C. A. Helm
    • 1
  • R. Hippler
    • 1
  1. 1.Institut für Physik, Ernst-Moritz-Arndt-Universität GreifswaldGreifswaldGermany
  2. 2.Institut für Chemie und Biochemie, Ernst-Moritz-Arndt-Universität GreifswaldGreifswaldGermany

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