Mikko Heikkilä
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View article: Production of Isobutylene from Syngas – Isosynthesis Over Zirconia-Based Catalysts
Production of Isobutylene from Syngas – Isosynthesis Over Zirconia-Based Catalysts Open
This study presents the conversion of syngas (synthesis gas, CO + H 2 ) into isobutylene with monoclinic zirconia ( m- ZrO 2 ), mixed monoclinic/tetragonal zirconia ( m / t -ZrO 2 ), tetragonal zirconia ( t- ZrO 2 ) and Ce/La-doped zirconi…
View article: Atomic Layer Deposition of Superconductive Niobium Carbonitride Thin Films
Atomic Layer Deposition of Superconductive Niobium Carbonitride Thin Films Open
Transition metal carbonitrides (TMCN) are stable materials with excellent catalytic and superconductive properties. Atomic layer deposition (ALD) stands out as the optimal method for the fabrication of these materials, enabling their use i…
View article: Atomic Layer Deposition of Ti<sub><i>x</i></sub>Fe<sub>2–<i>x</i></sub>O<sub>3</sub> Photoanodes and Photocurrent Response Optimization Using the Response Surface Methodology
Atomic Layer Deposition of Ti<sub><i>x</i></sub>Fe<sub>2–<i>x</i></sub>O<sub>3</sub> Photoanodes and Photocurrent Response Optimization Using the Response Surface Methodology Open
Hematite (Fe2O3) is a promising visible-light-active semiconductor material for photoelectrocatalytic applications; however, it has yet to achieve its theoretical maximum efficiency. Researchers globally are making si…
View article: Chemically Specific Coherent Raman Imaging of Liquid–Liquid Phase Separation and Its Sequelae
Chemically Specific Coherent Raman Imaging of Liquid–Liquid Phase Separation and Its Sequelae Open
Liquid-liquid phase separation (LLPS) plays a pivotal role in processes ranging from cellular structure reorganization to the formation of crystalline structures in materials science. In the pharmaceutical field, it has been demonstrated t…
View article: Indoor direct air capture using amorphous MOF pellets from blast furnace slag: Waste to porous functional materials
Indoor direct air capture using amorphous MOF pellets from blast furnace slag: Waste to porous functional materials Open
View article: Atomic Layer Deposition of TixFe2-xO3 Photoanodes and Photocurrent Response Optimization by using Response Surface Methodology
Atomic Layer Deposition of TixFe2-xO3 Photoanodes and Photocurrent Response Optimization by using Response Surface Methodology Open
Hematite (Fe2O3) is a promising visible-light-active semiconductor material for photoelectrocatalytic applications; however, it has yet to achieve its theoretical maximum efficiency. Researchers globally are making significant efforts to e…
View article: Atomic Layer Deposition of TixFe2-xO3 Photoanodes and Photocurrent Response Optimization by using Response Surface Methodology
Atomic Layer Deposition of TixFe2-xO3 Photoanodes and Photocurrent Response Optimization by using Response Surface Methodology Open
Hematite (Fe2O3) is a promising visible-light-active semiconductor material for photoelectrocatalytic applications; however, it has yet to achieve its theoretical maximum efficiency. Researchers globally are making significant efforts to e…
View article: Atomic Layer Deposition of Molybdenum Carbide Thin Films
Atomic Layer Deposition of Molybdenum Carbide Thin Films Open
The development of deposition processes for metal carbide thin films is rapidly advancing, driven by their potential for applications including catalysis, batteries, and semiconductor devices. Within this landscape, atomic layer deposition…
View article: Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media
Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media Open
Coinage metals Cu, Ag, and Au are essential for modern electronics and their recycling from waste materials is becoming increasingly important to guarantee the security of their supply. Designing new sustainable and selective procedures th…
View article: Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media
Sequential Selective Dissolution of Coinage Metals in Recyclable Ionic Media Open
Coinage metals Cu, Ag, and Au are essential for modern electronics and their recycling from waste materials is becoming increasingly important to guarantee the security of their supply. Designing new sustainable and selective procedures th…
View article: Atomic Layer Deposition of ScF<sub>3</sub> and Sc<sub><i>x</i></sub>Al<sub><i>y</i></sub>F<sub><i>z</i></sub> Thin Films
Atomic Layer Deposition of ScF<sub>3</sub> and Sc<sub><i>x</i></sub>Al<sub><i>y</i></sub>F<sub><i>z</i></sub> Thin Films Open
In this paper, we present an ALD process for ScF3 using Sc(thd)3 and NH4F as precursors. This is the first material made by ALD that has a negative thermal expansion over a wide-temperature range. Crystalli…
View article: Molecular Layer Deposition of Pyrrone Thin Films by Oxidative Polymerization
Molecular Layer Deposition of Pyrrone Thin Films by Oxidative Polymerization Open
In this paper, the deposition of pyrrone thin film materials by molecular layer deposition (MLD) is reported for the first time using pyromellitic dianhydride (PMDA) and 3,3'‐diaminobenzidine (DAB) as monomers, and ozone as a promoting pre…
View article: Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake
Electroblown titanium dioxide and titanium dioxide/silicon dioxide submicron fibers with and without titania nanorod layer for strontium(II) uptake Open
Nuclear power is a clean alternative to fossil fuels. However, the use of nuclear energy generates hazardous fission products of which 90Sr is the second most important. To remove Sr2+ from aqueous solutions, we synthesized submicron TiO2 …
View article: Bulk synthesis of stoichiometric/meteoritic troilite (FeS) by high‐temperature pyrite decomposition and pyrrhotite melting
Bulk synthesis of stoichiometric/meteoritic troilite (FeS) by high‐temperature pyrite decomposition and pyrrhotite melting Open
Stoichiometric troilite (FeS) is a common phase in differentiated and undifferentiated meteorites. It is the endmember of the iron sulfide system. Troilite is important for investigating shock metamorphism in meteorites and studying spectr…
View article: Laboratory-scale X-ray absorption spectroscopy of 3d transition metals in inorganic thin films
Laboratory-scale X-ray absorption spectroscopy of 3d transition metals in inorganic thin films Open
Ex-situ and in-situ x-ray absorption near edge spectroscopy (XANES) and ex-situ extended x-ray absorption fine structure (EXAFS) studies of CuI and CuO thin films with laboratory-scale X-ray absorption spectrometer in fluorescence mode.
View article: Red Y2O3:Eu-Based Electroluminescent Device Prepared by Atomic Layer Deposition for Transparent Display Applications
Red Y2O3:Eu-Based Electroluminescent Device Prepared by Atomic Layer Deposition for Transparent Display Applications Open
Y2O3:Eu is a promising red-emitting phosphor owing to its high luminance efficiency, chemical stability, and non-toxicity. Although Y2O3:Eu thin films can be prepared by various deposition methods, most of them require high processing temp…
View article: Atomic Layer Deposition of Insulating AlF3/Polyimide Nanolaminate Films
Atomic Layer Deposition of Insulating AlF3/Polyimide Nanolaminate Films Open
This article describes the deposition of AlF3/polyimide nanolaminate film by inorganic-organic atomic layer deposition (ALD) at 170 °C. AlCl3 and TiF4 were used as precursors for AlF3. Polyimide layers were deposited from PMDA (pyromelliti…
View article: Atomic layer deposition of TbF3 thin films
Atomic layer deposition of TbF3 thin films Open
Lanthanide fluoride thin films have gained interest as materials for various optical applications, including electroluminescent displays and mid-IR lasers. However, the number of atomic layer deposition (ALD) processes for lanthanide fluor…
View article: Role\nof ALD Al<sub>2</sub>O<sub>3</sub> Surface Passivation\non the Performance of p‑Type Cu<sub>2</sub>O Thin Film Transistors
Role\nof ALD Al<sub>2</sub>O<sub>3</sub> Surface Passivation\non the Performance of p‑Type Cu<sub>2</sub>O Thin Film Transistors Open
High-performance p-type oxide thin\nfilm transistors (TFTs) have\ngreat potential for many semiconductor applications. However, these\ndevices typically suffer from low hole mobility and high off-state\ncurrents. We fabricated p-type TFTs …
View article: Role of ALD Al2O3 Surface Passivation on the Performance of p-Type Cu2O Thin Film Transistors.
Role of ALD Al2O3 Surface Passivation on the Performance of p-Type Cu2O Thin Film Transistors. Open
High-performance p-type oxide thin film transistors (TFTs) have great potential for many semiconductor applications. However, these devices typically suffer from low hole mobility and high off-state currents. We fabricated p-type TFTs with…
View article: Novel electroblowing synthesis of tin dioxide and composite tin dioxide/silicon dioxide submicron fibers for cobalt(<scp>ii</scp>) uptake
Novel electroblowing synthesis of tin dioxide and composite tin dioxide/silicon dioxide submicron fibers for cobalt(<span>ii</span>) uptake Open
Calcination temperature and heating rate markedly affected the structure and morphology of electroblown SnO2/SiO2composite fibers. Compared with bare SnO2fibers, the SiO2component improved the me…
View article: Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions
Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions Open
IntroductionShock-induced changes in planetary materials related to impacts or planetary collisions are known to be capable of altering their optical properties. One such example is observed in ordinary chondrite meteorites. The highly sho…
View article: Sulphide‐induced stress corrosion cracking and hydrogen absorption of copper in deoxygenated water at 90°C
Sulphide‐induced stress corrosion cracking and hydrogen absorption of copper in deoxygenated water at 90°C Open
Stress corrosion cracking (SCC) of oxygen‐free phosphorous‐alloyed copper was investigated in sulphide‐ and chloride‐containing deoxygenated water at 90°C with sulphide concentrations of 0.001 and 0.00001 M. Several intergranular defects w…
View article: Magnetic properties and resistive switching in mixture films and nanolaminates consisting of iron and silicon oxides grown by atomic layer deposition
Magnetic properties and resistive switching in mixture films and nanolaminates consisting of iron and silicon oxides grown by atomic layer deposition Open
SiO2-Fe2O3 mixture films and nanolaminates were grown by atomic layer deposition from iron trichloride, hexakis(ethylamino)disilane, and ozone at 300 °C. Orthorhombic ɛ-Fe2O3 was identified in Fe2O3 reference films and in Fe2O3 layers grow…
View article: Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions
Experimental constraints on the ordinary chondrite shock darkening caused by asteroid collisions Open
Shock-induced changes in ordinary chondrite meteorites related to impacts or planetary collisions are known to be capable of altering their optical properties. Thus, one can hypothesize that a significant portion of the ordinary chondrite …
View article: High-temperature X-ray scattering studies of atomic layer deposited IrO<sub>2</sub>
High-temperature X-ray scattering studies of atomic layer deposited IrO<sub>2</sub> Open
IrO 2 is an important material in numerous applications ranging from catalysis to the microelectronics industry, but despite this its behaviour upon annealing under different conditions has not yet been thoroughly studied. This work provid…
View article: Silicon oxide-niobium oxide mixture films and nanolaminates grown by atomic layer deposition from niobium pentaethoxide and hexakis(ethylamino) disilane
Silicon oxide-niobium oxide mixture films and nanolaminates grown by atomic layer deposition from niobium pentaethoxide and hexakis(ethylamino) disilane Open
Amorphous SiO2-Nb2O5 nanolaminates and mixture films were grown by atomic layer deposition. The films were grown at 300 °C from Nb(OC2H5)5, Si2(NHC2H
View article: Research data archive of the sperical shock experiment with Chelyabinsk meteorite
Research data archive of the sperical shock experiment with Chelyabinsk meteorite Open
This archive contains files with research data supplement to a publication "Experimental constrains on the mechanism and the amount of spectral shock darkening in ordinary chondrite materials during asteroid collisions" by Kohout et al. Th…
View article: Research data archive of the sperical shock experiment with Chelyabinsk meteorite
Research data archive of the sperical shock experiment with Chelyabinsk meteorite Open
This archive contains files with research data supplement to a publication "Experimental constrains on the mechanism and the amount of spectral shock darkening in ordinary chondrite materials during asteroid collisions" by Kohout et al. Th…
View article: Research data archive of the sperical shock experiment with Chelyabinsk meteorite
Research data archive of the sperical shock experiment with Chelyabinsk meteorite Open
This archive contains files with research data supplement to a publication "Experimental constrains on the mechanism and the amount of spectral shock darkening in ordinary chondrite materials during asteroid collisions" by Kohout et al. Th…