| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Leißner, Till
University of Southern Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
- 2021Bias-Dependent Dynamics of Degradation and Recovery in Perovskite Solar Cellscitations
- 2019Femtosecond time-resolved photoemission electron microscopy operated at sample illumination from the rear sidecitations
- 2018Detection and characterization of attenuated multimode waveguiding in SiO2 slabs using photoemission electron microscopycitations
- 2018Single-mode to multi-mode crossover in thin-load polymethyl methacrylate plasmonic waveguides
- 2016Challenges of fabricating plasmonic and photonic structures with Neon ion beam milling
- 2015Local field enhanced second-harmonic response of organic nanofibers deposited on encapsulated plasmonic substratescitations
- 2014The complex dispersion relation of surface plasmon polaritons at gold/para-hexaphenylene interfacescitations
- 2014The Interplay between Localized and Propagating Plasmonic Excitations Tracked in Space and Timecitations
- 2013Surface plasmon polariton propagation in organic nanofiber based plasmonic waveguidescitations
- 2013Spatiotemporal characterization of SPP pulse propagation in two-dimensional plasmonic focusing devicescitations
- 2012Application of a grating coupler for surface plasmon polariton excitation in a photoemission electron microscopy experimentcitations
- 2012Mapping surface plasmon polariton propagation via counter-propagating light pulsescitations
Places of action
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article
Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
Abstract
<p>Polypropylene (PP) films have a wide range of applications, e.g. as dielectric materials for metallized film capacitors. In this article, we present a method for thickness reduction of PP films by ion irradiation, which has a direct effect on device capacitance. We show that the thickness of PP layers can be reduced by irradiation with He<sup>+</sup> ions and controlled on the nanometer scale by the irradiation dose. The effect of different thin metal film coatings on PP surface was also investigated. The metal coatings were used for two reasons: they function as one of the metal electrodes in the capacitor structure, and they minimize sample charging during ion irradiation. Three different metallization materials were investigated: 5 nm Pt<sub>60</sub>Pd<sub>40</sub>, 5 nm Au, and 15 nm Al. We studied two technologically relevant PP films: the thinnest commercially available biaxially oriented polypropylene (BOPP) and spin-coated polypropylene (SC-PP) thin films. The irradiation was done with a focused Helium-ion beam (He-FIB) in a Zeiss Orion NanoFab Microscope at a landing energy of 30 keV with doses in a range of 5.4 × 10<sup>–5</sup> nC/μm<sup>2</sup> to 8.1 × 10<sup>–3</sup> nC/μm<sup>2</sup>. An atomic force microscope (AFM) was used to analyze the details of surface modification: the surface height of the irradiated regions and surface morphology changes caused by the irradiation. For all applied doses, the Al-coated samples demonstrated smaller surface-height reduction compared to the Pt<sub>60</sub>Pd<sub>40</sub> and Au-coated samples. We speculate that the possible factors responsible for this effect include differences in the thickness and the crystalline-grain orientation (texture) of the metallization films. Both BOPP and spin-coated PP presented surface ridges at the borders between the irradiated and non-irradiated regions. It can be attributed to the mechanical strain induced by the material modification.</p>