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Formation of nanogaps in InAs nanowires by selectively etching embedded InP segments.

M I Schukfeh1, K Storm, A Hansen

  • 1Institut für Halbleitertechnik, Technische Universität Braunschweig, Germany.

Nanotechnology
|November 1, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed a new method to create nanometer-scale gaps in indium arsenide (InAs) nanowires using selective etching. This technique enables precise fabrication of semiconducting electrodes for nanoscale electronic transport studies.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Indium arsenide (InAs) nanowires are promising for nanoelectronic devices.
  • Fabricating precise nanometer-scale features within nanowires is challenging.

Purpose of the Study:

  • To develop a reliable method for creating nanometer-scale gaps in InAs nanowires.
  • To explore the potential of these nanogaps as semiconducting electrodes.

Main Methods:

  • Fabrication of InAs/InP heterostructure nanowires using vapor-liquid-solid growth.
  • Selective etching of embedded InP segments using a photo-assisted wet etching process in acetic acid and hydrobromic acid.

Main Results:

  • Achieved selective removal of InP segments down to 20 nm, creating nanogaps in InAs nanowires.
  • Verified the integrity of the InAs nanowires post-etching using scanning electron and transmission electron microscopy.
  • Demonstrated the functionality of the nanogaps by trapping 30 nm gold nanoparticles.

Conclusions:

  • The developed etching method enables precise fabrication of nanogaps in InAs nanowires.
  • These nanogaps serve as effective semiconducting electrodes for investigating nanoscale electronic transport.
  • The technique shows potential for advancing nanoelectronic device fabrication and characterization.