|Tipo di tesi||Tesi di laurea magistrale|
|Titolo||Physical synthesis and characterization of Ag@CaF_2 plasmonic nanoparticle films|
|Titolo in inglese|
|Struttura||Dipartimento di Scienze Fisiche, Informatiche e Matematiche|
|Corso di studi||PHYSICS – FISICA (D.M.270/04)|
|Data inizio appello||2018-10-25|
|Disponibilità||Accessibile via web (tutti i file della tesi sono accessibili)|
Ag NPs and Ag@CaF2 core-shell nanoparticles were physically synthesized using DC magnetron -based nanoparticles source and were deposited on Si/SiOx wafer. The samples were characterized by scanning electron microscope which showed the evidence of the presence of Ag nanoparticles and the agglomeration of those nanoparticles on the surface due to diffusion, and XPS for the elemental composition verification. Core-shell Ag@CaF2 were prepared by co-depositing Ag nanoparticles coming from the Nanocluster source and CaF2 molecules by an evaporation source. The surface plasmon resonance behaviour for different samples was analysed using optical reflectivity measurements with both p-polarised and s-polarised light. There is a clear evidence of shift in the plasmon excitation due to the presence of CaF2 on Si, which can represent a potential advantage for the technological applications in photovoltaics and optoeletcronics.