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Refractory Plasmonics of Reactively Sputtered Hafnium Nitride Nanoparticles: Pushing Limits.

Authors :
Pleskunov, Pavel
Protsak, Mariia
Krtouš, Zdeněk
Košutová, Tereza
Tosca, Marco
Biliak, Kateryna
Červenková, Veronika
Nikitin, Daniil
Hanuš, Jan
Cieslar, Miroslav
Gordeev, Ivan
Dopita, Milan
Vorochta, Michael
Kousal, Jaroslav
Martinu, Ludvik
Choukourov, Andrei
Source :
Advanced Optical Materials. May2024, Vol. 12 Issue 13, p1-13. 13p.
Publication Year :
2024

Abstract

High‐temperature plasmonics deals with optically active nanostructures that can withstand high temperatures. A conventional approach relying on standalone noble metal nanoparticles fails to deliver refractory plasmonic nanomaterials, and an alternative route envisions metal nitrides. The main challenge remains the development of advanced synthesis techniques and the insight into thermal stability under real‐life application conditions. Here, hafnium nitride nanoparticles (HfN NPs) can be produced by gas aggregation using reactive magnetron sputtering, a technique with a small environmental footprint are shown. As‐deposited NPs are of 10 nm mean size and consist of stoichiometric, crystalline fcc HfN. They are characterized by optical absorption below 500 nm caused by interband transitions and in the red/near‐infrared (NIR) region due to intraband transitions and localized surface plasmon resonance (LSPR). The optical response can be engineered by tuning the NP composition as predicted by finite‐difference time‐domain (FDTD) calculations. Going beyond the state‐of‐the‐art, the HfN NP thermal stability is focued under ultrahigh vacuum (UHV) and in air. During UHV annealing to 850 °C, the NPs retain their morphology, chemical and optical properties, which makes them attractive in space mission and other applications. During air annealing to 800 °C, HfN NPs remain stable until 250 °C, which sets a limit for air‐mediated use. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21951071
Volume :
12
Issue :
13
Database :
Academic Search Index
Journal :
Advanced Optical Materials
Publication Type :
Academic Journal
Accession number :
177060930
Full Text :
https://doi.org/10.1002/adom.202302715