Low-temperature fabrication of germanium nanostructures by ion irradiation: Effect of supplied particle species

Ako Miyawaki, Toshiaki Hayashi, Tomoharu Tokunaga, Akari Hayashi, Yasuhiko Hayashi, Masaki Tanemura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Germanium (Ge) surfaces were irradiated by argon (Ar) ions at 600 eV with a simultaneous Ge, Al, or Au supply at room temperature. The surfaces thus ion-irradiated were characterized by densely distributed nanowalls, nanobelts (narrower than the nanowalls in width), and cones tipped with nanoribbons (narrower than the nanobelts in width), depending on the supplied particle species and the supply rate. The higher the melting points of the supplied materials, the narrower the width of the top of the nanostructures. Thus the melting point and the supply rate of the supplied material are the key parameters for controlling the shape and size in the fabrication of ion-induced Ge nanostructures. It was also demonstrated that for nanowalls and nanobelts, a higher particle supply rate yielded wider nanostructures. For many nanoribbon-tipped cones, the width of the nanoribbon increased with distance from the cone top, and hence resulted in a bottleneck structure.

Original languageEnglish
Article number01AB05
JournalJapanese journal of applied physics
Volume51
Issue number1 PART 2
DOIs
Publication statusPublished - Jan 1 2012
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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