Nanometer-sized colloidal germanium particles: Wet-chemical synthesis, laser-induced crystallization and particle growth

Authors

  • Andreas Kornowski,

    1. Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
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  • Dr. Michael Giersig,

    1. Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
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  • Dr. Ralf Vogel,

    1. Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
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  • Dr. Abdelkarim Chemseddine,

    1. Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
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  • Dr. Horst Weller

    Corresponding author
    1. Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
    • Department of Photochemistry, Hahn-Meitner Institute Berlin GmbH, Glienicker Strasse 100, D-14109 Berlin (FRG)
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  • The authors thank Dr. A. Eychmüller for stimulating discussions, Dr. R. Eichberger for technical help at the laser, Mrs. U. Bloeck for electron microscopic measurements, and Prof. Dr. E. Zeitler from the Fritz-Haber-Institut der MPG, Berlin, for placing the image processing facilities in his laboratory at our disposal.

Abstract

Nanometer-sized semiconductor particles are currently being intensively investigated in many fields of physics and chemistry—especially since the discovery of visible luminescence in porous silicon. This is one of the first papers to concentrate on the synthesis of IV – IV nanoparticles. A purely wet-chemical room-temperature synthesis is described that leads to stable nanometer colloidal germanium particles after laser illumination. The size of the crystallites can be controlled by adjusting the illumination conditions. The preparation technique detailed here is not restricted to germanium but can also be applied to other IV–IV semiconductor particles.

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