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Plasmonic high-entropy carbides.

Arrigo Calzolari1, Corey Oses2,3, Cormac Toher3,4

  • 1CNR-NANO Research Center S3, Modena, Italy. arrigo.calzolari@nano.cnr.it.

Nature Communications
|October 11, 2022
PubMed
Summary
This summary is machine-generated.

Researchers discovered tunable plasmonic properties in high-entropy transition-metal carbides, a new class of multifunctional materials. These ceramics exhibit excellent stability for advanced optical and telecommunication applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Advanced optical and telecommunication applications require multifunctional materials with tunable plasmonic properties that are stable in harsh environments.
  • High-entropy transition-metal carbides offer exceptional thermal, chemical, and mechanical stability.

Purpose of the Study:

  • To discover and characterize novel high-entropy transition-metal carbides with tunable plasmonic properties.
  • To explore the potential of these materials for advanced optical and telecommunication applications.

Main Methods:

  • Computational thermodynamic disorder modeling.
  • Time-dependent density functional theory (TD-DFT) characterization.
  • Experimental validation on HfTa4C5.

Main Results:

  • A metal-to-dielectric transition was identified in the infrared and visible range, exploitable for plasmonics.
  • Optical response is tunable from near-IR to visible by altering transition metal components and concentration.
  • HfTa4C5 exhibited stable plasmonic properties from room temperature to 1500K.

Conclusions:

  • Plasmonic transition-metal high-entropy carbides are proposed as a new class of multifunctional materials.
  • Their unique combination of plasmonic activity, high hardness, and thermal stability opens avenues for novel applications.