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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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Otto, Felix
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Topics
Publications (13/13 displayed)
- 2023Structural and electronic properties of MoS2 and MoSe2 monolayers grown by chemical vapor deposition on Au(111)†citations
- 2023Superconductivity of K‐Intercalated Epitaxial Bilayer Graphenecitations
- 2023Heterostructure Films of SiO 2 and HfO 2 for High-Power Laser Optics Prepared by Plasma-Enhanced Atomic Layer Depositioncitations
- 2023Heterostructure Films of SiO2 and HfO2 for High-Power Laser Optics Prepared by Plasma-Enhanced Atomic Layer Depositioncitations
- 2023Early oxidation stages of austenitic stainless steel monitored using Mn as tracercitations
- 2022Representative volume elements for matrix-inclusion composites - a computational study on periodizing the ensemblecitations
- 2022Cation speciation, compactness, and structure‐property correlations in manganese aluminosilicate glassescitations
- 2022Correlation between two- and three-dimensional crystallographic lattices for epitaxial analysis. II. Experimental resultscitations
- 2022Plasma-Enhanced Atomic Layer Deposition of HfO2 with Substrate Biasing: Thin Films for High-Reflective Mirrorscitations
- 2021Influence of substrate materials on nucleation and properties of iridium thin films grown by ALDcitations
- 2020Effect of an electric field during the deposition of silicon dioxide thin films by plasma enhanced atomic layer deposition:an experimental and computational studycitations
- 2017Fully Atomistic Understanding of the Electronic and Optical Properties of a Prototypical Doped Charge-Transfer Interfacecitations
- 2017Fully atomistic understanding of the electronic and optical properties of a prototypical doped charge-transfer interfacecitations
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article
Influence of substrate materials on nucleation and properties of iridium thin films grown by ALD
Abstract
Ultra-thin metallic films are widely applied in optics and microelectronics. However, their properties differ significantly from the bulk material and depend on the substrate material. The nucleation, film growth, and layer properties of atomic layer deposited (ALD) iridium thin films are evaluated on silicon wafers, BK7, fused silica, SiO2 , TiO2 , Ta2O5 , Al2O3 , HfO2 , Ru, Cr, Mo, and graphite to understand the influence of various substrate materials. This comprehensive study was carried out using scanning electron and atomic force microscopy, X-ray reflectivity and diffraction, four-point probe resistivity and contact angle measurements, tape tests, and Auger electron spectroscopy. Within few ALD cycles, iridium islands occur on all substrates. Nevertheless, their size, shape, and distribution depend on the substrate. Ultra-thin (almost) closed Ir layers grow on a Ta2O5 seed layer after 100 cycles corresponding to about 5 nm film thickness. In contrast, the growth on Al2O3 and HfO2 is strongly inhibited. The iridium growth on silicon wafers is overall linear. On BK7, fused silica, SiO2 , TiO2 , Ta2O5 , Ru, Cr, and graphite, three different growth regimes are distinguishable. The surface free energy of the substrates correlates with their iridium nucleation delay. Our work, therefore, demonstrates that substrates can significantly tailor the properties of ultra-thin films.