ArchivIA Università degli Studi di Catania

ArchivIA - Archivio istituzionale dell'Universita' di Catania >
Tesi >
Tesi di dottorato >
Area 09 - Ingegneria industriale e dell'informazione >

Utilizza questo identificativo per citare o creare un link a questo documento:

Data: 31-mag-2011
Autori: Marletta, Vincenzo
Titolo: FERROELECTRIC E-FIELD SENSORS, A nonlinear dynamic approach to the development of innovative measurement devices
Abstract: The exploitation of nonlinear dynamics behavior in ferroelectric material toward the realization of innovative transducers for the detection of weak and low frequency electric fields is the focus of this thesis. A nonlinear dynamical system based on ferroelectric capacitors coupled into a unidirectional ring circuit is considered with particular interest for developing novel electric field sensors. The focused approach is based on the exploitation of circuits made up by the ring connection of an odd number of elements containing a ferroelectric capacitor, which under particular conditions exhibits an oscillating regime of behavior. For such a device a weak, external, target electric field interacts with the system thus inducing perturbation of the polarization of the ferroelectric material; this, the target signal can be indirectly detected and quantified via its effect on the system response. The conceived devices exploit the synergetic use of bi-stable ferroelectric materials, micromachining technologies that allow us to address charge density amplification, and implement novel sensing strategies based on coupling non-linear elemental cells. Advanced simulation tools have been used for modeling a system including electronic components and non linear elements as the conceived micro-capacitors. Moreover, Finite Element Analysis (FEM) has allowed us to steer the capacitor electrodes design toward optimal geometries and to improve the knowledge of effects of the external target E-field on the electric potential acting on the ferroelectric material. An experimental characterization of the whole circuit, including three cells coupled in a ring configuration has also been carried out.
InArea 09 - Ingegneria industriale e dell'informazione

Full text:

File Descrizione DimensioniFormatoConsultabilità
Tesi_PhD_Vincenzo_Marletta_part4.pdfTesi parte 49,32 MBAdobe PDFVisualizza/apri
Tesi_PhD_Vincenzo_Marletta_part5.pdfTesi parte 57,05 MBAdobe PDFVisualizza/apri
Tesi_PhD_Vincenzo_Marletta_part6.pdfTesi parte 67,87 MBAdobe PDFVisualizza/apri
Tesi_PhD_Vincenzo_Marletta_part1.pdfTesi parte 13,67 MBAdobe PDFVisualizza/apri
Tesi_PhD_Vincenzo_Marletta_part2.pdfTesi parte 25,35 MBAdobe PDFVisualizza/apri
Tesi_PhD_Vincenzo_Marletta_part3.pdfTesi parte 39,57 MBAdobe PDFVisualizza/apri

Tutti i documenti archiviati in ArchivIA sono protetti da copyright. Tutti i diritti riservati.

Segnala questo record su




Stumble it!



  Browser supportati Firefox 3+, Internet Explorer 7+, Google Chrome, Safari

ICT Support, development & maintenance are provided by the AePIC team @ CILEA. Powered on DSpace Software.