| Tipo di tesi | Tesi di laurea magistrale | ||||||||||||||||||||||||||||||
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| Autore | PELATTI, SAMUELE | ||||||||||||||||||||||||||||||
| URN | etd-03092021-125410 | ||||||||||||||||||||||||||||||
| Titolo | Localized surface plasmon resonances in metallic nanoparticles coupled with cerium oxide | ||||||||||||||||||||||||||||||
| Titolo in inglese | Localized surface plasmon resonances in metallic nanoparticles coupled with cerium oxide | ||||||||||||||||||||||||||||||
| Struttura | Dipartimento di Scienze Fisiche, Informatiche e Matematiche | ||||||||||||||||||||||||||||||
| Corso di studi | PHYSICS – FISICA (D.M.270/04) | ||||||||||||||||||||||||||||||
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| Data inizio appello | 2021-04-16 | ||||||||||||||||||||||||||||||
| Disponibilità | Accessibile via web (tutti i file della tesi sono accessibili) | ||||||||||||||||||||||||||||||
Riassunto analitico
The aim of this work is to study the effects on cerium oxide optical properties of the coupling with plasmonic metallic nanoparticles. This study has the aim to improve the efficiency of possible future technological applications of cerium oxide in photocatalysis. Different samples of copper, silver and gold nanoparticles embedded within cerium oxide films of different thickness have been grown by using MBE. The samples have then been characterized with XPS, SEM and optical absorption spectra in the UV-visible range have been acquired. The plasmonic resonance of the metallic nanoparticles has been described by using the Maxwell-Garnett model and the simulations results have been compared with experimentally obtained spectra. Finally, the samples stability to air exposure has been investigated by further XPS measurements. |
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Abstract
The aim of this work is to study the effects on cerium oxide optical properties of the coupling with plasmonic metallic nanoparticles. This study has the aim to improve the efficiency of possible future technological applications of cerium oxide in photocatalysis. Different samples of copper, silver and gold nanoparticles embedded within cerium oxide films of different thickness have been grown by using MBE. The samples have then been characterized with XPS, SEM and optical absorption spectra in the UV-visible range have been acquired. The plasmonic resonance of the metallic nanoparticles has been described by using the Maxwell-Garnett model and the simulations results have been compared with experimentally obtained spectra. Finally, the samples stability to air exposure has been investigated by further XPS measurements. |
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