Argon Physisorption as Structural Probe for Endohedrally Doped Silicon Clusters

Ewald Janssens, Philipp Gruene, Gerard Meijer, Ludger Wöste, Peter Lievens, and André Fielicke
Phys. Rev. Lett. 99, 063401 – Published 9 August 2007
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Abstract

We report on an element-dependent critical size for argon physisorption at 80 K on transition-metal-doped silicon clusters. Argon does not attach to elemental silicon clusters but only to surface-located transition-metal atoms. Thus physisorption provides structural information. Specifically, the minimal cluster size for the formation of endohedral singly metal-doped silicon cages has been determined. The observed critical size for doubly doped silicon clusters indicates that larger caged molecules can be formed, eventually leading to the growth of metal-doped silicon nanorods.

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  • Received 30 December 2006

DOI:https://doi.org/10.1103/PhysRevLett.99.063401

©2007 American Physical Society

Authors & Affiliations

Ewald Janssens1,2, Philipp Gruene3, Gerard Meijer3, Ludger Wöste2, Peter Lievens1,*, and André Fielicke3,†

  • 1Laboratory of Solid State Physics and Magnetism & INPAC-Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
  • 2Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
  • 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany

  • *peter.lievens@fys.kuleuven.be
  • fielicke@fhi-berlin.mpg.de

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Issue

Vol. 99, Iss. 6 — 10 August 2007

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