Variable-Temperature Plasmonic High-Entropy Carbides

TL;DR

This study demonstrates that high-entropy transition-metal carbides exhibit tunable plasmonic resonances at various temperatures, including extreme conditions, with stable thermal cycling, offering new avenues for thermal management in energy and aerospace applications.

Contribution

It reveals that high-entropy carbides have tunable, stable plasmonic properties at high temperatures, enabling accelerated discovery of optically optimized materials.

Findings

High-entropy carbides exhibit plasmonic resonance at room and high temperatures.

These carbides show significant thermal cycling stability.

The approach accelerates the discovery of high-performance optical materials.

Abstract

Effective thermal management at variable and extreme temperatures face limitations for the development of novel energy and aerospace applications. Plasmonic approaches, shown to be capable of tailoring black-body emission, could be effective if materials with high-temperature and tunable plasmonic-resonance were available. Here, we report a synergy between experimental and theoretical results proving that many high-entropy transition-metal carbides, consisting of four or more metals at equal molar ratio, have plasmonic resonance at room, high (>1000C) and variable temperatures. We also found that these high-entropy carbides can be tuned and show considerable plasmonic thermal cycling stability. This paradigm-shift approach could prove quite advantageous as it facilitates the accelerated rational discovery and manufacturability of optically highly-optimized high-entropy carbides with ad-hoc properties.