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Related Experiment Video

Updated: Jun 21, 2026

Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism
09:36

Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism

Published on: July 18, 2018

Ion beam processing of Au nanowires.

V Tuboltsev1, J Räisänen

  • 1Division of Materials Physics, Department of Physics, University of Helsinki, PO Box 43, FIN-00014, Finland. vladimir.tuboltsev@helsinki.fi

Nanotechnology
|July 29, 2009
PubMed
Summary

Ion beam etching successfully downsized gold nanowires to 9 nm using argon ions. Gallium ions proved destructive, hindering the downsizing process due to surface condensation effects.

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Area of Science:

  • Nanoelectronics
  • Materials Science
  • Surface Science

Background:

  • Nanowires are fundamental components in nanoelectronics for charge transfer.
  • Downsizing prefabricated gold (Au) nanowires to sub-50 nm linewidths is crucial for advanced nanostructures.

Purpose of the Study:

  • To investigate the effectiveness of ion beam etching for downsizing Au nanowires.
  • To compare the impact of argon (Ar+) and gallium (Ga+) ions on nanowire morphology and dimensions.

Main Methods:

  • Utilizing low-energy Ar+ and Ga+ ion beams for dry etching of Au nanowires.
  • Characterizing nanowire dimensions and morphology post-etching to assess downsizing precision.

Main Results:

  • Achieved nanometer-precise gradual downsizing of Au nanowires to an effective diameter as small as 9 nm using Ar+ ions.
  • Observed destructive effects on nanowire morphology with Ga+ ions due to surface condensation and nanocondensate formation.
  • Identified polymorphism and dynamic behavior of Ga in solid and liquid states within the nanocondensate under ion irradiation.

Conclusions:

  • Ar+ ion beam etching is a viable method for controlled downsizing of Au nanowires to the 10 nm scale.
  • Ga+ ion etching is unsuitable for precise Au nanowire downsizing due to detrimental surface interactions and nanocondensate formation.

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