Formation of Metal-Polymer Nanocomposites Using Cluster Beam Technique
Author
Ceynowa, Florian Alexander
Term
4. term
Education
Publication year
2017
Submitted on
2017-05-19
Pages
88
Abstract
Dette speciale undersøger, hvordan man fremstiller metal-polymer nanokompositfilm, og hvordan deres metal-nanopartikler interagerer med lys (plasmoniske egenskaber). I første del deponeres størrelsesselekterede kobber-nanopartikler på tynde film af PMMA (akrylplast) og polystyren ved hjælp af en magnetron-sputter klyngekilde. Vi følger, hvordan partiklerne indlejres i polymererne, og hvordan forsigtig opvarmning (udglødning) ændrer deres lokaliserede overfladeplasmonresonans (LSPR) – den karakteristiske farve/lysabsorption for metal-nanopartikler. Behandling af nys deponerede partikler med ozon, som danner en tynd oxidskal, viste sig lovende til at bevare LSPR stabil over lang tid i luft. I anden del kombineres klyngebjælke-teknikken med elektronstrålelitografi for at fremstille ordnede arrays af sølv-nanopartikler. Vi demonstrerer, at metoden er gennemførlig, og præsenterer de første målinger af deres plasmoniske respons.
This thesis investigates how to make metal–polymer nanocomposite films and how their metal nanoparticles interact with light, known as plasmonic behavior. In the first part, size-selected copper nanoparticles were deposited onto thin films of PMMA (acrylic plastic) and polystyrene using a magnetron-sputtering cluster source. We tracked how the particles embed into the polymers and how gentle heating (annealing) changes their localized surface plasmon resonance (LSPR)—the characteristic color/light-absorption response of metal nanoparticles. Exposing freshly deposited particles to ozone, which forms a thin oxide shell, was found to be a promising way to keep the LSPR stable for long periods in air. In the second part, the cluster-beam method was combined with electron-beam lithography to fabricate ordered arrays of silver nanoparticles. We show that this approach is feasible and report initial measurements of their plasmonic response.
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