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Aqueous Synthesis of Plasmonic Gold-Tin Alloy Nanoparticles
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Eutectic liquid alloys for plasmonics: theory and experiment.

Martin G Blaber1, Clifford J Engel, S R C Vivekchand

  • 1Department of Chemistry, Northwestern University, Evanston, 60208, USA.

Nano Letters
|September 19, 2012
PubMed
Summary

Density functional theory molecular dynamics accurately predicts plasmonic properties of liquid metals and alloys. Room-temperature liquid metal alloys offer viable plasmonic applications despite minor performance changes.

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Area of Science:

  • Computational materials science
  • Condensed matter physics
  • Plasmonics

Background:

  • Liquid metals and their alloys are promising for plasmonic applications.
  • Predicting the optical properties of liquid systems from first principles is challenging.

Purpose of the Study:

  • To develop and validate a first-principles method for calculating plasmonic properties of liquid metals and alloys.
  • To investigate the plasmonic performance of the indium-gallium (In-Ga) alloy system.

Main Methods:

  • Density functional theory molecular dynamics (DFT-MD) simulations.
  • Calculation of optical constants and plasmonic properties.
  • Comparison of simulated results with experimental measurements.

Main Results:

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  • Exceptional agreement between simulated and measured optical constants for liquid gallium (Ga) and In-Ga eutectic alloy.
  • Plasmonic performance of In-Ga alloys decreases with increasing indium concentration.
  • The room-temperature liquid nature of the eutectic alloy offers practical advantages.

Conclusions:

  • DFT-MD is a reliable predictive tool for the optical properties of liquid metal plasmonics.
  • The In-Ga eutectic alloy presents a promising room-temperature plasmonic liquid.
  • This method enables the exploration of novel liquid metal systems for plasmonic devices.