Preparation and investigation of new heterostructures for prospective energetic and biomedical applications
type: CreativeWork
description: Nanotechnologies, defined as the ensemble of disciplines aiming at manipulating matter on an atomic or molecular scale and at exploiting the corresponding properties, have recently emerged as one of the most relevant research fields due to its implications in applied science and technological applications. Nanocrystals (NCs) with a uniformly crystalline structure and at least one dimension in the range 1÷100 nanometers, play a key role as building blocks for the assembly of innovative materials and devices for nanotechnology. A wide variety of nanocrystalline materials showing metallic, semiconducting, magnetic properties or their combinations are now available. It is well documented that nanocrystals exhibit physical properties, ranging from mechanical strength, chemical reactivity and conductivity that depend on their size and structure and differ from those of the corresponding bulk materials. For this reason, nanocrystals are regarded as promising building blocks for the fabrication of functional materials with targeted nanotechnological application. In particular, in semiconducting nanocrystals the formation of a set of discrete energy levels, at which the carriers can exist, results in quantum effects. Size restricts the movements of the charge carriers forcing them into a quantum confinement and is responsible for new properties. Again, magnetic materials with nanometric size may exhibit single domain structures, which reflect in unique physical properties such as superparamagnetism, enhanced coercivity, quantum tunnelling of the magnetization and giant magnetoresistance with respect to multi domain bulk magnets. The controlled manufacture of matter at the nanoscale is considered therefore as a promising route to obtain novel materials which can be exploited in optical, electronic, photovoltaic and magnetic nanotechnological applications. Within this framework, this PhD thesis has been focused on the design, preparation and characterization of heterostructure…
abstract: Nanotechnologies, defined as the ensemble of disciplines aiming at manipulating matter on an atomic or molecular scale and at exploiting the corresponding properties, have recently emerged as one of the most relevant research fields due to its implications in applied science and technological applications. Nanocrystals (NCs) with a uniformly crystalline structure and at least one dimension in the range 1÷100 nanometers, play a key role as building blocks for the assembly of innovative materials and devices for nanotechnology. A wide variety of nanocrystalline materials showing metallic, semiconducting, magnetic properties or their combinations are now available. It is well documented that nanocrystals exhibit physical properties, ranging from mechanical strength, chemical reactivity and conductivity that depend on their size and structure and differ from those of the corresponding bulk materials. For this reason, nanocrystals are regarded as promising building blocks for the fabrication of functional materials with targeted nanotechnological application. In particular, in semiconducting nanocrystals the formation of a set of discrete energy levels, at which the carriers can exist, results in quantum effects. Size restricts the movements of the charge carriers forcing them into a quantum confinement and is responsible for new properties. Again, magnetic materials with nanometric size may exhibit single domain structures, which reflect in unique physical properties such as superparamagnetism, enhanced coercivity, quantum tunnelling of the magnetization and giant magnetoresistance with respect to multi domain bulk magnets. The controlled manufacture of matter at the nanoscale is considered therefore as a promising route to obtain novel materials which can be exploited in optical, electronic, photovoltaic and magnetic nanotechnological applications. Within this framework, this PhD thesis has been focused on the design, preparation and characterization of heterostructure…
author: CONCA, ERIKA
language: eng
keywords: Nanocristalli, heterostructures semiconductor-metal, iron oxide magnetic nanoclusters, nanomaterial characterization, nanomateriali synthesis, Settore CHIM/10 - Chimica degli Alimenti
date published: 2015-03-13
date modified: 2026-07-24T01:30:09Z
provider: Università di Cagliari
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Università degli Studi di Cagliari

PropertyValue
property ID: Handle
value: http://hdl.handle.net/11584/266554