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Revisiting the structural instability observed in small particles in the electron microscope

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Zeitschrift für Physik D Atoms, Molecules and Clusters

Abstract

We present experimental results of the structural instability of gold clusters in the electron microscope. Observations of surface melting in a dynamic HREM study of small gold particles (2–5 nm) are provided. We argue that the temperature regime of the particle during observation, remains quite high at about 50–100 K below the particle's melting temperature. At this temperature, a further 15–30 eV would be enough to raise the particle's temperature above the melting point. We conclude that the structural instabilities observed are due to a mechanism based on a recrystallization from a highly excited state.

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  1. Daniel Ugarte

    Present address: Laboratorio Nacional de Luz Sincrotron, Rua Lauro Vanucci 1020, Faz-Sta. Candida, Cx. Postal 6192, 13081 SP, Campinas, Brazil

Authors and Affiliations

  1. Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne, CH-1015, Lausanne, Switzerland

    Daniel Ugarte

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  1. Daniel Ugarte
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Ugarte, D. Revisiting the structural instability observed in small particles in the electron microscope. Z Phys D - Atoms, Molecules and Clusters 28, 177–181 (1993). https://doi.org/10.1007/BF01436986

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  • DOI: https://doi.org/10.1007/BF01436986

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