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Linear indium atom chains at graphene edges.

Kenan Elibol1,2, Toma Susi1, Clemens Mangler1

  • 1University of Vienna, Faculty of Physics, Boltzmanngasse 5, A-1090 Vienna, Austria.

NPJ 2D Materials and Applications
|April 26, 2024
PubMed
Summary
This summary is machine-generated.

Researchers created indium atom chains on graphene nanoribbon edges. This controlled decoration influences the nanoribbons

Keywords:
Electronic properties and devicesTwo-dimensional materials

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Graphene nanoribbons (GNRs) offer tunable electronic properties.
  • Edge functionalization is key to modifying GNR characteristics.

Purpose of the Study:

  • To investigate the formation and properties of indium (In) atom chains on GNR edges.
  • To explore how In decoration impacts GNR electronic behavior.

Main Methods:

  • Graphene nanoribbons synthesized via laser-induced crystallization of hydrocarbon contamination on graphene.
  • Indium deposition using physical vapor deposition.
  • High-resolution characterization via aberration-corrected scanning transmission electron microscopy (STEM).
  • Theoretical analysis using density functional theory (DFT) calculations.

Main Results:

  • Indium atoms preferentially decorate the edges of graphene nanoribbons.
  • Electron beam irradiation during STEM imaging promotes In atom migration and chain formation.
  • DFT calculations show In-terminated zigzag GNRs remain metallic, while armchair GNRs become metallic.

Conclusions:

  • Controlled formation of linear metal atom chains on GNR edges is achievable.
  • Indium decoration significantly alters the electronic properties of GNRs, inducing metallicity in armchair structures.
  • This work provides a pathway for designing novel electronic properties in low-dimensional carbon materials.