Olivieri, Federico
(2018)
Manipulation of polymeric fluids through pyro-electro-hydro-dynamics.
[Tesi di dottorato]
| Tipologia del documento: |
Tesi di dottorato
|
| Lingua: |
English |
| Titolo: |
Manipulation of polymeric fluids through pyro-electro-hydro-dynamics |
| Autori: |
| Autore | Email |
|---|
| Olivieri, Federico | federico.olivieri@unina.it |
|
| Data: |
2018 |
| Numero di pagine: |
110 |
| Istituzione: |
Università degli Studi di Napoli Federico II |
| Dipartimento: |
dep08 |
| Dottorato: |
phd038 |
| Ciclo di dottorato: |
30 |
| Coordinatore del Corso di dottorato: |
| nome | email |
|---|
| Mensitieri, Giuseppe | [non definito] |
|
| Tutor: |
| nome | email |
|---|
| Mensitieri, Giuseppe | [non definito] | | Ferraro, Pietro | [non definito] | | D'Anna, Andrea | [non definito] |
|
| Data: |
2018 |
| Numero di pagine: |
110 |
| Parole chiave: |
pyroelectric
polymers
lab-on-a-chip
micro-optical devices |
| Settori scientifico-disciplinari del MIUR: |
Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 - Scienza e tecnologia dei materiali |
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| Depositato il: |
08 Gen 2018 00:52 |
| Ultima modifica: |
12 Apr 2019 08:00 |
| URI: |
http://www.fedoa.unina.it/id/eprint/12047 |
Abstract
This thesis is focused on the manipulation of liquids and polymeric fluids in a non-contact and electrode-free way, exploiting pyro-electro-hydro-dynamic systems. The thesis structure provides an introduction based on the theory and the combination between pyroelectric and electro-hydro-dynamic effect, with a focus on the developed techniques, followed by the presentation of the realized works. It will be presented the fabrication of micro-optical devices, in particular micro-lenses, through pyro-electro-hydro-dynamic effect. The attention will be directed toward the fabrication methods: in fact, they have been obtained by an ink-jet technology or through self-assembly on a micro-engineered pyroelectric crystal. In the first case, a new pyro-ink-jet set-up will be proposed and further modifications of the set-up, which will improve the flexibility of the technique, will be reported. The realized micro-lenses will be optically and geometrically characterized and it will be presented the fabrication of a multi-component device as an example of application of this technique. It will be shown that pyro-ink-jet printing permit to realize very uniform micro-lenses arrays with high resolution (diameter ̴ 300 nm). The second approach is based on the self-assembly of a micro-lenses array on a micro-engineered pyroelectric crystal. It will be showed an array decoration by nano-particles, such as quantum dots, and it will be presented the di-electro-phoretic effect on the employed dots. In particular, the study will focus on the effect of the patterned substrate on the localization of the nano-particles and on the investigation of the dots pattern transfer. Moreover, it will be shown another application of pyro-ink-jet printing: the capability of this system in the highly viscous solution manipulation allows the deposition of polymeric fibers and, in particular, how a fiber like these can be used as a component in a microfluidic channel. That demonstrates pyro-ink-jet printer is also an alternative to the classic electro-spinning system, avoiding electrodes and spiraling effect during the deposition. Produced fibers show great uniformity and reach thicknesses until the nano-metric scale. Moreover, there will be illustrated all the procedures realized to produce the micro-channel.
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