Nasti, Giuseppe (2016) Selective localization of nanoparticles in microstructured systems. [Tesi di dottorato]

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Item Type: Tesi di dottorato
Lingua: English
Title: Selective localization of nanoparticles in microstructured systems
Creators:
CreatorsEmail
Nasti, Giuseppegiuseppe.nasti@unina.it
Date: 30 March 2016
Number of Pages: 112
Institution: Università degli Studi di Napoli Federico II
Department: Ingegneria Chimica, dei Materiali e della Produzione Industriale
Scuola di dottorato: Ingegneria industriale
Dottorato: Ingegneria dei materiali e delle strutture
Ciclo di dottorato: 28
Coordinatore del Corso di dottorato:
nomeemail
Mensitieri, Giuseppegiuseppe.mensitieri@unina.it
Tutor:
nomeemail
Ambrogi, VeronicaUNSPECIFIED
Gentile, GennaroUNSPECIFIED
Cerruti, PierfrancescoUNSPECIFIED
Date: 30 March 2016
Number of Pages: 112
Uncontrolled Keywords: polymer, nanoparticles, nanocomposites
Settori scientifico-disciplinari del MIUR: Area 03 - Scienze chimiche > CHIM/07 - Fondamenti chimici delle tecnologie
Date Deposited: 12 Apr 2016 23:40
Last Modified: 31 Oct 2016 11:01
URI: http://www.fedoa.unina.it/id/eprint/10854

Abstract

The research activities carried out during the doctoral program focused on selective localization of nanoparticles in microstructured polymer systems. Three distinct processes, very different from each other, were employed to achieve similar results. The first area of research has involved the selective localization of the carbon nanotubes within a biphasic and bicontinuous blend of polystyrene and polylactic acid, obtained by melt mixing the two thermoplastic polymers. Nanoparticles were selectively dispersed in the polystyrene phase achieving a lower percolation threshold than the initial one. In the second line of research, carried out in collaboration with the Soft Matter Physics group of the Adolphe Merkle Institute (Fribourg, Switzerland), hybrid organometallic perovkite nanocrystals were produced by precipitation in liquid phase. These nanocrystals were then incorporated into a thin film of polyethylene glycol diacrylate deposited by spin-coating on a glass substrate. The polymer crosslinking, triggered by exposure to an oxygen plasma, induced the formation of corrugations on the film surface (wrinkles) allowing the microstructuring of the perovskite. In the third line of research, carried out in collaboration with the National Institute of Optics (INO-CNR), selective localization of quantum dots in polydimethylsiloxane microlenses on a pyroelectric lithium niobate substrate were achieved through electrohydrodynamic and dielectrophoretic mechanisms. The lithium niobate substrate was periodically poled in an hexagonal pattern using finite element simulations to predict the final position of particles.

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