| 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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Minjauw, Matthias
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Atomic layer deposition for tuning the surface chemical composition of nickel iron phosphates for oxygen evolution reaction in alkaline electrolyzerscitations
- 2024Controlling Pt nanoparticle sintering by sub-monolayer MgO ALD thin filmscitations
- 2022Atomic layer deposition of ternary ruthenates by combining metalorganic precursors with RuO4 as the co-reactantcitations
- 2022Shuffling Atomic Layer Deposition Gas Sequences to Modulate Bimetallic Thin Films and Nanoparticle Propertiescitations
- 2022Shuffling atomic layer deposition gas sequences to modulate bimetallic thin films and nanoparticle propertiescitations
- 2022Atomic layer deposition of ruthenium dioxide based on redox reactions between alcohols and ruthenium tetroxidecitations
- 2022Plasma-enhanced atomic layer deposition of nickel and cobalt phosphate for lithium ion batteriescitations
- 2021In situ study of noble metal atomic layer deposition processes using grazing incidence small angle X-ray scattering
- 2021Emergence of Metallic Conductivity in Ordered One-Dimensional Coordination Polymer Thin Films upon Reductive Dopingcitations
- 2019Atomic layer deposition of thin films as model electrodes : a case study of the synergistic effect in Fe2O3-SnO2citations
- 2016Atomic layer deposition route to tailor nanoalloys of noble and non-noble metalscitations
Places of action
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article
Atomic layer deposition of ruthenium dioxide based on redox reactions between alcohols and ruthenium tetroxide
Abstract
Atomic layer deposition (ALD) of ruthenium dioxide (RuO2) thin films using metalorganic precursors and O-2 can be challenging because the O-2 dose needs to be precisely tuned and significant nucleation delays are often observed. Here, we present a low-temperature ALD process for RuO2 combining the inorganic precursor ruthenium tetroxide (RuO4) with alcohols. The process exhibits immediate linear growth at 1 angstrom/cycle when methanol is used as a reactant at deposition temperatures in the range of 60-120 degrees C. When other alcohols are used, the growth per cycle increases with an increasing number of carbon atoms in the alcohol chain. Based on X-ray photoelectron spectroscopy (XPS) and conventional X-ray diffraction, the deposited material is thought to be amorphous RuO2. Interestingly, pair distribution function (PDF) analysis shows that a structural order exists up to 2-3 nm. Modeling of the PDF suggests the presence of Ru nanocrystallites within a predominantly amorphous RuO2 matrix. Thermal annealing to 420 degrees C in an inert atmosphere crystallizes the films into rutile RuO2. The films are conductive, as is evident from a resistivity value of 230 mu Omega.cm for a 20 nm film grown with methanol, and the resistivity decreased to 120 mu Omega.cm after crystallization. Finally, based on in situ mass spectrometry, in situ infrared spectroscopy, and in vacuo XPS studies, an ALD reaction mechanism is proposed, involving partial reduction of the RuO2 surface by the alcohol followed by reoxidation of the surface by RuO4 and concomitant deposition of RuO2.