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Related Experiment Videos

Oxygen-enhanced atomic chain formation.

W H A Thijssen1, D Marjenburgh, R H Bremmer

  • 1Kamerlingh Onnes Laboratorium, Universiteit Leiden, Niels Bohrweg 2, 2333 CA Leiden, Netherlands.

Physical Review Letters
|February 21, 2006
PubMed
Summary

Oxygen incorporation enhances atomic chain formation in gold and silver contacts. Silver atomic chains, similar in length to gold

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Atomic chain formation is a key phenomenon in the mechanical and electrical properties of nanoscale contacts.
  • Gold is known to form atomic chains, but silver's behavior in this regard is less understood, especially under similar conditions.

Purpose of the Study:

  • To experimentally investigate the role of oxygen incorporation in the formation of atomic chains in gold and silver contacts.
  • To compare the characteristics of oxygen-enhanced atomic chains in gold and silver.

Main Methods:

  • Experimental stretching of atomic-sized contacts made of gold and silver.
  • In-situ observation and electrical conductance measurements during contact stretching.
  • Controlled introduction of oxygen during the stretching process.

Main Results:

  • Atomic chain formation was observed and significantly enhanced by oxygen in both gold and silver contacts.
  • Silver atomic chains, in the presence of oxygen, achieved lengths comparable to those of gold.
  • Conductance of silver atomic chains decreased to approximately 0.1 conductance quantum with increasing chain length.

Conclusions:

  • Oxygen incorporation plays a crucial role in promoting atomic chain formation in both gold and silver.
  • The findings suggest a link between oxygen chemisorption, surface reconstruction on silver (110) surfaces, and atomic chain behavior.
  • This study provides new insights into the fundamental mechanisms governing the behavior of metallic nanowires.

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