ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-10012020-174824


Tipo di tesi
Tesi di laurea magistrale
Autore
RUGGERI, MARINA
URN
etd-10012020-174824
Titolo
Indium Tin Oxide nanoparticles: synthesis, characterization and incorporation in smart polymeric nanocomposites
Dipartimento
CHIMICA E CHIMICA INDUSTRIALE
Corso di studi
CHIMICA
Relatori
relatore Pineider, Francesco
relatore Pucci, Andrea
Parole chiave
  • Plasmonics
  • LSPR
  • localized surface plasmon resonance
  • ITO
  • indium tin oxide
  • nanoparticles
  • nanocomposites
  • smart polymeric nanocomposites
  • smart polymers
Data inizio appello
22/10/2020
Consultabilità
Non consultabile
Data di rilascio
22/10/2090
Riassunto
Noble metals have been the most widely employed materials for plasmonics for years. However, new, less expensive and more functional materials have recently entered the world of plasmonics. These include doped semiconductors, and among these tin-doped indium oxide (ITO, Indium Tin Oxide), the subject of this thesis. It differs from noble metals for its optical transparency, accompanied by good electrical conductivity. ITO nanoparticles show a plasmon resonance peak in the near infrared and their plasmonic properties can be modulated as a function of doping.
First, the basic concepts of plasmonics are introduced. The attention is focused mainly on localized surface plasmons in nanoparticles, which are the object of study of this thesis.
The main synthetic approaches for ITO nanoparticles are presented and a new synthetic approach is proposed.
Then, ITO nanoparticles obtained in this this work are characterized. Optical and magneto-optical properties are analysed and Drude parameters (the electron effective mass and the density of free electrons) are extrapolated from the absorption and the MCD spectra.
Finally, ITO nanoparticles are dispersed in polymer matrices in order to prepare nanocomposites. Polyethylene is used to prepare smart polymeric nanocomposites responsive to mechanical stimuli, while stamps obtained with a polystyrene matrix are studied for their photothermal activity, with potential application in the field of anti-counterfeiting.
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