Dynamics of charge transfer from plasmonic nanoparticles to cerium oxide

Spurio, Eleonora (2022) Dynamics of charge transfer from plasmonic nanoparticles to cerium oxide. Il nuovo cimento C, 45 (6). pp. 1-4. ISSN 1826-9885

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Abstract

The combination of semiconducting oxide-based materials with plasmonic nanoparticles (NPs) aims to efficiently convert solar light into chemical or electric energy, exploiting the excitation of localized surface plasmon resonance (LSPR) in the NPs that leads to a significant energy/charge transfer to the oxide. By performing UV-Visible spectrophotometry measurements on systems composed of Cu/Au NPs embedded in a matrix of CeO2, we observed a wide absorption band in the visible range, ascribed to the LSPR excitation in the NPs. Femtosecond transient absorption spectroscopy at different pump energies across the LSPR band of the NPs unveiled a persistent charge transfer from the NPs to CeO2. Efficiency up to 35% for systems with Au NPs has been estimated.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	06 Sep 2022 13:18
Last Modified:	06 Sep 2022 13:18
URI:	http://eprints.bice.rm.cnr.it/id/eprint/22070

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