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High Energy Chemistry

, Volume 51, Issue 4, pp 245–249 | Cite as

Formation of nanostructures during coagulation of semiconductors in superfluid helium

  • E. B. Gordon
  • A. V. Karabulin
  • S. A. Krasnokutski
  • V. I. Matyushenko
  • I. I. Khodos
General Aspects of High Energy Chemistry

Abstract

As in the case of metals, laser ablation of germanium and silicon in superfluid helium leads to the formation of thin nanowires; spherical nanoclusters are also present in ablation products. A decrease in the resistance of bundles of silicon nanowires with increasing temperature is typical of semiconductors. Laser ablation of amorphous graphite also leads to the formation of quasi-one-dimensional structures, but there are no spherical clusters among the coagulation products. The structure of carbon filaments is amorphous; they contain onion-like entities, and nanodiamonds appear as coagulation products when the concentration of carbon introduced into superfluid helium increases. The peculiar behavior of carbon is associated with the impossibility of its melting at low pressures.

Keywords

superfluid helium laser ablation nanowires nanodiamonds 

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • E. B. Gordon
    • 1
  • A. V. Karabulin
    • 2
  • S. A. Krasnokutski
    • 3
  • V. I. Matyushenko
    • 4
  • I. I. Khodos
    • 5
  1. 1.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovka, Moscow oblastRussia
  2. 2.MEPhI National Research Nuclear University (Moscow Institute of Engineering Physics)MoscowRussia
  3. 3.Laboratory Astrophysics Group of the Max Planck Institute for Astronomy at the Friedrich Schiller University JenaInstitute of Solid State PhysicsJenaGermany
  4. 4.Talrose Institute of Energy Problems of Chemical Physics, Chernogolovka BranchRussian Academy of SciencesChernogolovka, Moscow oblastRussia
  5. 5.Institute of Problems of Technology in Microelectronics and Ultrahigh-Purity MaterialsRussian Academy of SciencesChernogolovka, Moscow oblastRussia

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