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Redshift of quantum-particle plasmon stemming from thermal-induced quantum size effects: Numerical modeling and experimental evidence
Mufei Xiao
Thermal Science and Engineering 2025, 8(4); https://doi.org/10.24294/tse10880
Submitted:13 Dec 2024
Accepted:13 Dec 2024
Published:29 Dec 2025
Abstract

Work is reported on thermal-induced redshifts of quantum particle plasmon. The redshifts are predicted to be caused indirectly by the quantum size effects. The particles are enlarged when temperature increases, and consequently, quantum size effects modify the plasmon but not the band structure. It has been modeled for metallic quantum particles. The results are also instructive to other quantum systems, such as complex molecules.  Every electron inside the quantum particle is taken into account. Tiny quantum size effects are harvested, and the redshift becomes significant. Experimental evidence is also given for the spectral redshift. Faujasite zeolites were synthesized. Optical spectroscopy has been carried out, and the resulting spectra showed a significant redshift with the increase in temperature.

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