Ανάπτυξη αισθητήρων πλασμονίου οπτικών ινών γεωμετρίας U με την χρήση νανοσωματιδίων χρυσού (Doctoral thesis)
In the context of this dissertation, we developed and studied a novel, fast and chemical/polymeric free LSPR-OFS manufacturing technique, which combines optical fibers in U geometry, gold nanoparticles and the use of pulsed laser radiation. This technique involves two steps: The first step is to modify the optical fiber in U geometry and then immobilize gold nanoparticles, by means of a dip coating of the fiber in the nanoparticle’s colloidal solution. The result of the first step is the creation of an LSPR-OFS, which is practically inoperable due to the extensive aggregation during the deposition process. Then, in the second step of the fabrication process, the sensor is irradiated by a pulsed laser, resulting in the dissociation of the aggregates, spectral narrowing of the LSPR extinction spectrum, and amplification of the plasmon peak. We call this novel technique "Tailoring Decorations by Laser Irradiation" (TDLI). The LSPR-OFS constructed using the TDLI technique were studied as Refractive Index (RI) sensors in sugar and alcohol solutions. During the optimization of the technique nanoparticle deposition and irradiation protocols were developed. Finally, a number of parameters were studied, such as nanoparticle size, deposition concentration, irradiation wavelength, and pulse duration. The results of these studies will help to further develop these sensors and lead to their widespread use outside the lab.
|Institution and School/Department of submitter:||Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Φυσικής|
|Subject classification:||Αισθητήρες οπτικών ινών|
|Keywords:||Αισθητήρες οπτικών ινών,Εντοπισμένος επιφανιακός πλασμονικός συντονισμός,Νανοσωματίδια χρυσού,Ακτινοβολία λέιζερ,Optical fiber sensors,Localized surface plasmon resonance,Gold nanoparticles,Laser irradiation|
|Appears in Collections:||Διδακτορικές Διατριβές|
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|Δ.Δ. ΣΠΑΣΟΠΟΥΛΟΣ ΔΗΜΟΣΘΕΝΗΣ 2018.pdf||8.08 MB||Adobe PDF||View/Open|
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