Corrosion mechanisms of TiO2 photoelectrode coatings in alkaline conditions
L. Palmolahti, J. Hämelahti, M. Hannula, H. Ali-Löytty, and M. Valden
Surface and Coatings Technology 494, 3, (2024)
Refereed Journal Articles
2024
Production of mixed phase Ti3+-rich TiO2 thin films by oxide defect engineered crystallization
L. Palmolahti, H. Ali-Löytty, M. Hannula, T. Tinus, K. Lehtola, A. Tukiainen, J. Reuna and M. Valden
Nanoscale (2024)
Ti3+ Self-doping-mediated optimization of TiO2 photocatalyst coating grown by atomic layer deposition
B. D. Bhuskute, H. Ali-Löytty, J. Saari, A. Tukiainen, and M. Valden
ACS Applied Engineering Materials 2, 9, 2278–2284 (2024)
Silver nanoparticle coatings with adjustable extinction spectra produced with liquid flame spray, and their role in photocatalytic enhancement of TiO2
M. Sorvali, T. Tinus, J. Thamby, M. Honkanen, H. Ali-Löytty, A. Charmforoushan, M. Valden, J. J. Saarinen, and J. M. Mäkelä
Materials & Design 239, 112800 (2024)
2023
Water-resistant perovskite-inspired copper/silver pnictohalide nanocrystals for photoelectrochemical water splitting
M. Liu, G. K. Grandhi, B. Al-Anesi, H. Ali-Löytty, K. Lahtonen, R. Grisorio, and P. Vivo
Electrochimica Acta 462, 142734 (2023)
Less is more: Simplified fluorene-based dopant-free hole transport materials promote the long-term ambient stability of perovskite solar cells
P. Mäkinen, F. Fasulo, M. Liu, G. K. Grandhi, D. Conelli, B. Al-Anesi, H. Ali-Löytty, K. Lahtonen, S. Toikkonen, G. P. Suranna, A. B. Muñoz-García, M. Pavone, R. Grisorio, and P. Vivo
Chemistry of Materials 35, 2975-2987 (2023)
Role of CsMnCl3 nanocrystal structure on its luminescence properties
A. Matuhina, G. K. Grandhi, F. Pan, M. Liu, H. Ali-Löytty, H. M. Ayedh, A. Tukiainen, J.-H. Smått, V. Vähänissi, H. Savin, J. Li, P. Rinke, and P. Vivo
ACS Applied Nano Materials 6, 953-965 (2023)
Antimony-Bismuth Alloying: The Key to a Major Boost in the Efficiency of Lead-Free Perovskite-Inspired Photovoltaics
B. Al-Anesi, G. K. Grandhi, A. Pecoraro, V. Sugathan, N. S. M. Viswanath, H. Ali-Löytty, M. Liu, T.-P. Ruoko, K. Lahtonen, D. Manna, S. Toikkonen, A. B. Muñoz-García, M. Pavone, P. Vivo
Small (2023)
Ex-situ biological hydrogen methanation in trickle bed reactors: Integration into biogas production facilities
D. Kamravamanesh, J. M. Rinta Kanto, H. Ali-Loytty, A. Myllärinen, M. Saalasti, J. Rintala, and M. Kokko,
Chemical Engineering Science 269, 118498 (2023)
Triple A-site cation mixing in 2D perovskite-inspired antimony halide absorbers for efficient indoor photovoltaics
N. Lamminen, G. K. Grandhi, F. Fasulo, A. Hiltunen, H. Pasanen, M. Liu, B. Al-Anesi, A. Efimov, H. Ali-Löytty, K. Lahtonen, P. Mäkinen, A. Matuhina, A. B. Muñoz-García, M. Pavone, and P. Vivo
Advanced Energy Materials 13(4), 2203175 (2023)
Is carrier mobility a limiting factor for charge transfer in TiO2/Si devices? A study by transient reflectance spectroscopy
R. Khan, H. P. Pasanen, H. Ali-Löytty, H. M. Ayedh, J. Saari, V. Vähänissi, M. Valden, H. Savin, N. V. Tkachenko
Surfaces and Interfaces 38, 102871 (2023)
Surface and optical properties of phase-pure silver iodobismuthate nanocrystals
A. Matuhina, G. K. Grandhi, A. Bergonzoni, L. Pedesseau, R. Grisorio, S. Annurakshita, H. Ali-Löytty, R. Varghese, K. Lahtonen, G. Volonakis, V. Pecunia, G. Bautista, J. Even, and P. Vivo
Nanoscale 15, 14764-14773 (2023)
2022
A new user-friendly materials science end station at the FinEstBeAMS beamline of MAX IV
W. Wang, A. Kivimäki, K. Chernenko, R. Pärna, T. Käämbre, E. Kukk, K. Kokko, M. Valden, M. Hirsimäki, M. Kirm, and M. Huttula
Journal of Physics: Conference Series 2380, 012048 (2022)
Influence of the photodeposition sequence on the photocatalytic activity of plasmonic Ag–Au/TiO2 nanocomposites
B. D. Bhuskute, H. Ali-Löytty, M. Honkanen, T. Salminen, and M. Valden
Nanoscale Advances 4, 4335-4343 (2022)
Fractal-like Hierarchical CuO Nano/Microstructures for Large-Surface-to-Volume-Ratio Dip Catalysts
V. Sharma, V. S. Parihar, H. Ali-Löytty, J. Vihinen, D. Ukale, K. Yiannacou, K. Lahtonen, M. Kellomäki, and V. Sariola
ACS Applied Nano Materials 5, 14591–14601 (2022)
Low-temperature route to direct amorphous to rutile crystallization of TiO2 thin films grown by atomic layer deposition
J. Saari, H. Ali-Löytty, K. Lahtonen, M. Hannula, L. Palmolahti, A. Tukiainen, and M. Valden
Journal of Physical Chemistry C 126, 15357-15366 (2022)
Functionalization of TiO2 inverse opal structure with atomic layer deposition grown Cu for photocatalytic and antibacterial applications
K. Pham, H. Ali-Löytty, J. Saari, M. Zubair, M. Valden, K. Lahtonen, N. Kinnunen, M. Gunell, and J. J. Saarinen
Optical Materials 131, 112695 (2022)
Pinhole-resistant nanocrystalline rutile TiO2 photoelectrode coatings
L. Palmolahti, H. Ali-Löytty, M. Hannula, J.Saari, W. Wang, A. Tukiainen, K. Lahtonen, and M. Valden
Acta Materialia 239, 118257 (2022)
Heparin-Derived Theranostic Nanoprobes Overcome the Blood–Brain Barrier and Target Glioma in Murine Model
S. Samanta, V. Le Joncour, O. Wegrzyniak, V. K. Rangasami, H. Ali-Löytty, T. Hong, R. K. Selvaraju, O. Aberg, J. Hilborn, P. Laakkonen, O. P. Varghese, O. Eriksson, H. Cabral, O. P. Oommen
Advanced Therapeutics 5, 2200001 (2022)
Enhancing the microstructure of perovskite-inspired Cu-Ag-Bi-I absorber for efficient indoor photovoltaics
G. K. Grandhi, B. Al-Anesi, H. Pasanen, H. Ali-Löytty, K. Lahtonen, S. Granroth, N. Christian, A. Matuhina, M. Liu, A. Berdin, V. Pecunia, and P. Vivo
Small 18, 2203768 (2022)
Tunable Ti3+-mediated charge carrier dynamics of atomic layer deposition-grown amorphous TiO2
J. Saari, H. Ali-Löytty, M. Kauppinen, M. Hannula, R. Khan, K. Lahtonen, L. Palmolahti, A. Tukiainen, H. Groenbeck, N. Tkachenko, and M. Valden
Journal of Physical Chemistry C 126 (9), 4542-4554 (2022)
Low residual dissolved phosphate in spent medium bioleaching enables rapid and enhanced solubilization of rare earth elements from end-of-life NiMH batteries
P. Rasoulnia, R. Barthen, A.-M. Lakaniemi, H. Ali-Löytty, and J. A. Puhakka,
Minerals Engineering 176, 107361 (2022)
Moisture-assisted near-UV emission enhancement of lead-free Cs4CuIn2Cl12 double perovskite nanocrystals
M. Liu, S. Matta, H. Ali-Löytty, A. Matuhina, G. K. Grandhi, K. Lahtonen, S. Russo, and P. Vivo
Nano Letters 22 (1), 311–318 (2022)
2021
Octahedral distortion driven by CsPbI3 nanocrystals reaction temperature – the effects on phase stability and beyond
A. Matuhina, G. K. Grandhi, M. Liu, J.-H. Smått, N. S. M. Viswanath, H. Ali-Löytty, K. Lahtonen, and P. Vivo
Nanoscale 13 (33), 14186–14196 (2021)
Comparison of the heat-treatment effect on carrier dynamics in TiO2 thin films deposited by different methods
R. Khan, H. Ali-Löytty, A. Tukiainen, and N. Tkachenko
Physical Chemistry Chemical Physics 23, 17672–17682 (2021)
Visible to near-infrared broadband fluorescence from Ce-doped silica fiber
A. Yadav, N. B. Chichkov, R. Gumenyuk, H. Ali-Löytty, K. Lahtonen, M. Valden, M. A. Melkumov, M. V. Yashkov, E. Zherebtsov, and E. U. Rafailov
Optical Materials Express 11 (8), 2528–2538 (2021)
Lead-free cesium titanium bromide double perovskite nanocrystals
G. K. Grandhi, A. Matuhina, M. Liu, S. Annurakshita, H. Ali-Löytty, G. Bautista, and P. Vivo
Nanomaterials 11 (6), 1458 (2021)
Interface engineering of TiO2 photoelectrode coatings grown by atomic layer deposition on Silicon
J. Saari, H. Ali-Löytty, M. Honkanen, A. Tukiainen, K. Lahtonen, and M. Valden
ACS Omega 6 (41), 27501–27509 (2021)
Manganese doping promotes the synthesis of bismuth-based perovskite nanocrystals while tuning their band structures
M. Liu, H. Ali‐Löytty, A. Hiltunen, E. Sarlin, S. Qudsia, J.-H. Smått, M. Valden, P. Vivo
Small 2100101 (2021)
Ultrathin-walled 3D inorganic nanostructured networks templated from crosslinked cellulose nanocrystal aerogels
A. Hiltunen, T. Or, K. Lahtonen, H. Ali-Löytty, N. Tkachenko, M. Valden, E. Sarlin, E. D. Cranston, J. M. Moran-Mirabal, and J. Vapaavuori
Advanced Materials Interfaces 2001181 (2021)
Copper oxide micro-tufts on natural fractals for efficient water harvesting
V. Sharma, H. Ali-Löytty, A. Koivikko, K. Yiannacou, K. Lahtonen, and V. Sariola
Langmuir 37 (11), 3370–3381 (2021)
GaAs surface passivation for InAs/GaAs quantum dot based nanophotonic devices
A. Chellu, E. Koivusalo, M. Raappana, S. Ranta, V. Polojärvi, A. Tukiainen, K. Lahtonen, J. Saari, M. Valden, H. Seppänen, H. Lipsanen, M. Guina, and T. Hakkarainen
Nanotechnology 32 (13), 130001 (2021)
2020
Strong, rapid and reversible photochromic response of Nb doped TiO2 nanocrystal colloids in hole scavenging media
R. Eglītis, U. Joost, A. Zukuls, K. Rubenis, R. Ignatāns, L. Avotiņa, L. Baumane, K. Šmits, M. Hirsimäki, T. Käämbre, and A. Šutka
ACS Applied Materials & Interfaces 12 (51), 57609–57618 (2020)
B-site co-alloying with Germanium improves the efficiency and stability of all-inorganic Tin-based perovskite nanocrystal solar cells
M. Liu, H. Pasanen, H. Ali-Löytty, A. Hiltunen, K. Lahtonen, S. Qudsia, J.-H. Smått, M. Valden, N. Tkachenko, and P. Vivo
Angewandte Chemie International Edition 59, 22117–22125 (2020)
Gas-phase endstation of electron, ion and coincidence spectroscopies for diluted samples at the FinEstBeAMS beamline of the MAX IV 1.5 GeV storage ring
K. Kooser, A. Kivimäki, P. Turunen, R. Pärna, L. Reisberg, M. Kirm, M. Valden, M. Huttula, and E. Kukk
Journal of Synchrotron Radiation 27, 1080–1091 (2020)
Optimization of photogenerated charge carrier lifetimes in ALD grown TiO2 for photonic applications
R. Khan, H. Ali-Löytty, J. Saari, M. Valden, A. Tukiainen, K. Lahtonen, and N. V. Tkachenko
Nanomaterials 10 (8), 1567 (2020)
Modification of surface states of hematite-based photoanodes by submonolayer of TiO2 for enhanced solar water splitting
L. Palmolahti, H. Ali-Löytty, R. Khan, J. Saari, N. V. Tkachenko, and M. Valden
Journal of Physical Chemistry C 124, 13094–13101 (2020)
Aluminium oxide formation via atomic layer deposition using a polymer brush mediated selective infiltration approach
M. Snelgrove, C. McFeely, P. G. Mani-Gonzalez, K. Lahtonen, R. Lundy, G. Hughes, M. Valden, E. McGlynn, P. Yadav, J. Saari, M. Morris, and R. O'Connor
Applied Surface Science 515, 145987 (2020)
Negative-ion/positive-ion coincidence spectroscopy as a tool to identify anionic fragments: the case of core-excited CHF3
A. Kivimäki,C. Stråhlman, R. Sankari, R. Richter
Journal of Mass Spectrometry 55 (5), e4487 (2020)
2019
Chemical dissolution of Pt(111) during potential cycling under negative pH conditions studied by operando X-ray photoelectron spectroscopy
H. Ali-Löytty, M. Hannula, M. Valden, A. Eilert, H. Ogasawara, and A. Nilsson
Journal of Physical Chemistry C 123 (41), 25128–25134 (2019)
Large-scale efficient water harvesting using bioinspired micro-patterned copper oxide surfaces and guided droplet transport
V. Sharma, K. Yiannacou, M. Karjalainen, K. Lahtonen, M. Valden, and V. Sariola
Nanoscale Advances 1, 4025–4040 (2019)
Influence of ex-situ annealing on the properties of MgF2 thin films deposited by electron beam evaporation
J. Reuna, V. Polojärvi, P. Pääkkönen, K. Lahtonen, M. Raappana, T. Aho, R. Isoaho, A. Aho, M. Valden, and M. Guina
Optical Materials 96, 109326 (2019)
Highly efficient charge separation in model Z-scheme TiO2/TiSi2/Si photoanode by micropatterned titanium silicide interlayer
M. Hannula, H. Ali-Löytty, K. Lahtonen, J. Saari, A. Tukiainen, and M. Valden
Acta Materialia 174, 237–245 (2019)
Charge carrier dynamics in tantalum oxide overlayered and doped hematite photoanodes
T.-P. Ruoko, A. Hiltunen, T. Iivonen, R. Ulkuniemi, K. Lahtonen, H. Ali-Löytty, M. Valden, M. Leskelä, and N. Tkachenko
Journal of Materials Chemistry A 7, 3206–3215 (2019)
Operando observation of chemical transformations of Iridium oxide during photoelectrochemical water oxidation
L. Li, J. Yang, H. Ali-Löytty, T.-C. Weng, F. M. Toma, D. Sokaras, I. D. Sharp, and A. Nilsson
ACS Applied Energy Materials 2, 1371–1379 (2019)
Diversity of TiO2: Controlling the molecular and electronic structure of atomic layer deposited black TiO2
H. Ali-Löytty, M. Hannula, J. Saari, L. Palmolahti, B. Bhuskute, R. Ulkuniemi, T. Nyyssönen, K. Lahtonen, and M. Valden
ACS Applied Materials & Interfaces 11, 2758–2762 (2019)
2018
DLC-treated aramid-fibre composites: tailoring nanoscale-coating for macroscale performance
M. Kanerva, S. Korkiakoski, K. Lahtonen, J. Jokinen, E. Sarlin, S. Palola, A. Iyer, P. Laurikainen, X. W. Liu, M. Raappana, S. Tervakangas, and M. Valden
Composites Science and Technology 171, 62–69 (2018)
Reversible photodoping of TiO2 nanoparticles for photochromic applications
U. Joost, A. Šutka, M. Oja, K. Smits, N. Döbelin, A. Loot, M. Järvekülg, M. Hirsimäki, M. Valden, and E. Nõmmiste
Chemistry of Materials 30(24), 8968–8974 (2018)
Solvothermal synthesis derived Co-Ga codoped ZnO diluted magnetic degenerated semiconductor nanocrystals
A. Šutka, T. Käämbre, U. Joost, K. Kooser, M. Kook, R. F. Duarte, V. Kisand, M. Maiorov, N. Döbelin, K. Smits
Journal of Alloys and Compounds 763, 164–172 (2018)
Design aspects of all atomic layer deposited TiO2-Fe2O3 scaffold-absorber photoanodes for water splitting
A. Hiltunen, T.-P. Ruoko, T. Iivonen, K. Lahtonen, H. Ali-Löytty, E. Sarlin, M. Valden, M. Leskelä, and N. Tkachenko
Sustainable Energy & Fuels 2, 2124–2130 (2018)
Fabrication of ultrathin multilayered superomniphobic nanocoatings by liquid flame spray, atomic layer deposition and silanization
M. Sorvali, L. Vuori, M. Pudas, J. Haapanen, R. Mahlberg, H. Ronkainen, M. Honkanen, M. Valden, and J. Mäkelä
Nanotechnology 29, 185708 (2018)
Improved stability of ALD grown amorphous TiO2 photoelectrode coatings by thermally induced oxygen defects
M. Hannula, H. Ali-Löytty, K. Lahtonen, E. Sarlin, J. Saari, and M. Valden
Chemistry of Materials 30(4), 1199–1208 (2018)
Switchable light reflectance in dilute magneto-optical colloids based on nickel ferrite nanowires
A. Šutka, M. Timusk, U. Joost, R. Ignatans, and M. Maiorov
e-Journal of Surface Science and Nanotechnology 16, 119–121 (2018)
Aqueous synthesis of Z-Scheme photocatalyst powders and thin-film photoanodes from earth abundant elements
A. Šutka, M. Vanags, U. Joost, K. Šmits, J. Ruža, J. Ločs, J. Kleperis, and T. Juhna
Journal of Environmental Chemical Engineering 6 (2), 2606–2615 (2018)
The role of (FeCrSi)2(MoNb)-type Laves phase on the formation of Mn-rich protective oxide scale on ferritic stainless steel
H. Ali-Löytty, M. Hannula, T. Juuti, Y. Niu, A. A. Zakharov, and M. Valden
Corrosion Science 132, 214–222 (2018)
Humidity influence on optical properties of nanowire colloids with modulated visual response to electrostatic charge
A. Šutka, U. Joost, M. Järvekülg, and M. Timusk
Colloid and Interface Science Communications 22, 34–37 (2018)
2017
High-power 1180 nm GaInNAs DBR laser diodes
A. T. Aho, J. Viheriälä, V.-M. Korpijärvi, M. Koskinen, H. Virtanen, M. Christensen, T. Uusitalo, K. Lahtonen, M. Valden, and M. Guina
IEEE Photonics Technology Letters 29(23), 2023–2026 (2017)
FinEstBeaMS - a wide-range Finnish-Estonian beamline for materials science at the 1.5 GeV storage ring at the MAX IV Laboratory
R. Pärna, R. Sankari, E. Kukk, E. Nõmmiste, M. Valden, M. Lastusaari, K. Kooser, K. Kokko, M. Hirsimäki, S. Urpelainen, P. Turunen, A. Kivimäki, V. Pankratov, L. Reisberg, F. Hennies, H. Tarawneh, R. Nyholm, and M. Huttula
Nuclear Instruments and Methods in Physics Research A: Accelerators, Spectrometers, Detectors and Associated Equipment 859, 83–89 (2017)
Building up colors: multilayered arrays of peryleneimides on flat surfaces and on mesoporous layers
L. George, E. Efimova, E. Sariola-Leikas, K. Lahtonen, M. Valden, P. Vivo, H. Hakola, A. Hiltunen, and A. Efimov
ChemPlusChem 82, 1–12 (2017)
Investigation of the structural anisotropy in a self-assembling glycinate layer on Cu(100) by scanning tunneling microscopy and density functional theory calculations
M. Kuzmin, K. Lahtonen, L. Vuori, R. Sánchez-de-Armas, M. Hirsimäki, and M. Valden
Applied Surface Science 409, 111–116 (2017)
Hot dip galvanized steel by nanomolecular silane layers as hybrid interface between zinc and top coatings
L. Vuori, H. Ali-Löytty, K. Lahtonen, M. Hannula, E. Lehtonen, Y. R. Niu, and M. Valden
Corrosion 73(2), 169–180 (2017)
Tailored fabrication of transferable and hollow weblike titanium dioxide structures
A. Hiltunen, K. Lahtonen, J. Saari, A. Ojanperä, E. Sarlin, H. Wondraczek, A. Efimov, K. Kaunisto, P. Vivo, C. Maccato, D. Barreca, P. Fardim, N. Tkachenko, M. Valden, and H. Lemmetyinen
ChemPhysChem 18, 64–71 (2017)
2016
UPS and DFT investigation of the electronic structure of gas-phase trimesic acid
L. Reisberg, R. Pärna, A. Kikas, I. Kuusik, V. Kisand, M. Hirsimäki, M. Valden, and E. Nõmmiste
Journal of Electron Spectroscopy and Related Phenomena 213, 11–16 (2016)
Grain orientation dependent Nb–Ti microalloying mediated surface segregation on ferritic stainless steel
H. Ali-Löytty, M. Hannula, M. Honkanen, K. Östman, K. Lahtonen, and M. Valden
Corrosion Science 112, 204–213 (2016)
Improved antifouling properties and selective biofunctionalization of stainless steel by employing heterobifunctional silane-polyethylene glycol overlayers and avidin-biotin technology
V. Hynninen, L. Vuori, M. Hannula, K. Tapio, K. Lahtonen, T. Isoniemi, E. Lehtonen, M. Hirsimäki, J. J. Toppari, M. Valden, and V. Hytönen
Scientific Reports 6, 29324 (2016)
Fabrication of topographically microstructured titanium silicide interface for advanced photonic applications
M. Hannula, K. Lahtonen, H. Ali-Löytty, A. A. Zakharov, T. Isotalo, J. Saari, and M. Valden
Scripta Materialia 119, 76 (2016)
Ambient-pressure XPS study of a Ni–Fe electrocatalyst for the oxygen evolution reaction
H. Ali-Löytty, M. W. Louie, M. R. Singh, L. Li, H. G. Sanchez Casalongue, H. Ogasawara, E. J. Crumlin, Z. Liu, A. T. Bell, A. Nilsson, and D. Friebel
Journal of Physical Chemistry C 120 (4), 2247 (2016)
Color bricks: Building highly organized and strongly absorbing multicomponent arrays of terpyridyl perylenes on metal oxide surfaces
E. Sariola-Leikas, Z. Ahmed, P. Vivo, A. Ojanperä, K. Lahtonen, J. Saari, M. Valden, H. Lemmetyinen, and A. Efimov
Chemistry - A European Journal 22, 1501 (2016)
2015
Thermal management in long-wavelength flip-chip semiconductor disk lasers
A. Rantamäki, E. J. Saarinen, J. Lyytikäinen, J. Heikkinen, J. M. Kontio, K. Lahtonen, M. Valden, and O. G. Okhotnikov
IEEE Journal of Selected Topics in Quantum Electronics 21, 1501507 (2015)
Towards high power flip-chip long-wavelength semiconductor disk lasers
A. Rantamäki, E. J. Saarinen, J. Lyytikäinen, J. M. Kontio, J. Heikkinen, K. Lahtonen, M. Valden, and O. G. Okhotnikov
Proceedings of SPIE vol. 9349 (2015)
2014
Ormocomp® -modified glass as culture substratum for human embryonic stem cell-derived retinal pigment epithelial cells
E. Käpylä, A. Sorkio, S. Teymouri, K. Lahtonen, L. Vuori, M. Valden, H. Skottman, M. Kellomäki, and K. Juuti-Uusitalo
Langmuir 30, 14555 (2014)
Controlling the synergetic effects in (3-aminopropyl) trimethoxysilane and (3-mercaptopropyl) trimethoxysilane coadsorption on stainless steel surfaces
L. Vuori, M. Hannula, K. Lahtonen, P. Jussila, H. Ali-Löytty, M. Hirsimäki, R. Pärna, E. Nõmmiste, and M. Valden
Applied Surface Science 317, 856 (2014)
Biofunctional hybrid materials: bimolecular organosilane monolayers on FeCr alloys
L. Vuori, J. Leppiniemi, M. Hannula, K. Lahtonen, M. Hirsimäki, L. Costelle, E. Nõmmiste, V. Hytönen, and M. Valden
Nanotechnology 25, 435603 (2014)
Anodic oxidation of ultra-thin Ti layers on ITO substrates and their application in organic electronic memory elements
P. S. Heljo, K. Wolff, K. Lahtonen, M. Valden, P. Berger, H. S. Majumdar, and D. Lupo
Electrochimica Acta 137, 91 (2014)
Effect of plasma treated Ag/indium tin oxide anode modification on stability of polymer solar cells
B. Augustine, R. Sliz, K. Lahtonen, M. Valden, R. Myllylä, and T. Fabritius
Solar Energy Materials and Solar Cells 128, 330 (2014)
High power semiconductor disk laser with a semiconductor-dielectric-metal compound mirror
A. Rantamäki, E. J. Saarinen, J. Lyytikäinen, K. Lahtonen, M. Valden, and O.G. Okhotnikov
Applied Physics Letters 104, 101110 (2014)
2013
In situ XPS studies of electrochemically negatively polarized molybdenum carbide derived carbon double layer capacitor electrode
A. Tonisoo, J. Kruusma, R. Pärna, A. Kikas, M. Hirsimäki, E. Nõmmiste, and E. Lust
Journal of the Electrochemical Society 160(8), A1084 (2013)
Optimization of the electrical properties of Ti–Nb stabilized ferritic stainless steel SOFC interconnect alloy upon high-temperature oxidation: The role of excess Nb on the interfacial oxidation at the oxide–metal interface
H. Ali-Löytty, P. Jussila, and M. Valden
International Journal of Hydrogen Energy 38(2), 1039 (2013)
2012
Influence of precipitation on initial high-temperature oxidation of Ti-Nb stabilized ferritic stainless steel SOFC interconnect alloy
H. Ali-Löytty, P. Jussila, T. Juuti, L. P. Karjalainen, A. A. Zakharov, and M. Valden
International Journal of Hydrogen Energy 37(19), 14528 (2012)
Nanoscale surface properties of a Ni-Mn-Ga 10M magnetic shape memory alloy
I. Aaltio, X. W. Liu, M. Valden, K. Lahtonen, O. Söderberg, Y. Ge, and S.-P. Hannula
Journal of Alloys and Compounds 577, S367 (2012)
Effect of different annealing temperatures and SiO2/Si(100) substrate on the properties of nickel containing titania thin sol-gel films
R. Pärna, U. Joost, E. Nõmmiste, T. Käämbre, A. Kikas, I. Kuusik, I. Kink, M. Hirsimäki, and V. Kisand
Physica Status Solidi (a) 209, 953 (2012)
2011
Adsorption structure and bonding of trimesic acid on Cu(100)
L. Kanninen, N. Jokinen, H. Ali-Löytty, P. Jussila, K. Lahtonen, M. Hirsimäki, M. Kuzmin, R. Pärna, E. Nõmmiste, and M. Valden
Surface Science 605, 1968-1978 (2011)
Effect of dielectric barrier on rectification, injection and transport properties of printed organic diodes
K. E. Lilja, H. S. Majumdar, K. Lahtonen, P. Heljo, S. Tuukkanen, T. Joutsenoja, M. Valden, R. Österbacka, and D. Lupo
Journal of Physics D: Applied Physics 44, 295301 (2011)
Characterization of silane layers on modified stainless steel surfaces and related stainless steel-plastic hybrids
M. Honkanen, M. Hoikkanen, M. Vippola, J. Vuorinen, P. Jussila, H. Ali-Löytty, M. Lampimäki, M. Valden, and T. Lepistö
Applied Surface Science 257, 9335-9346 (2011)
Influence of CrN surface compound on the initial stages of high temperature oxidation of ferritic stainless steel
H. Ali-Löytty, P. Jussila, M. Hirsimäki, and M. Valden
Applied Surface Science 257, 7783-7791 (2011)
Effect of cobalt doping and annealing on properties of titania thin films prepared by sol-gel process
R. Pärna, U. Joost, E. Nõmmiste, T. Käämbre, A. Kikas, I. Kuusik, M. Hirsimäki, I. Kink, and V. Kisand
Applied Surface Science 257, 6897-6907 (2011)
The effect of iridium precursor on oxide-supported iridium catalysts prepared by atomic layer deposition
H. Vuori, A. Pasanen, M. Lindblad, M. Valden, M. Veringa Niemelä, and A. O. I. Krause
Applied Surface Science 257, 4204-4210 (2011)
2010
Electron spectroscopic study of passive oxide layer formation on Fe-19Cr-18Ni-1Al-TiC austenitic stainless steel
R. Pärna, E. Nõmmiste, A. Kikas, P. Jussila, M. Hirsimäki, M. Valden, and V. Kisand
Journal of Electron Spectroscopy and Related Phenomena 182, 108-114 (2010)
Effect of surface hydroxyl concentration on the bonding and morphology of aminopropylsilane thin films on austenitic stainless steel
P. Jussila, H. Ali-Löytty, K. Lahtonen, M. Hirsimäki, and M. Valden
Surface and Interface Analysis 42, 157-164 (2010)
2009
Inhibition of initial surface oxidation by strongly bound hydroxyl species and Cr segregation: H2O and O2 adsorption on Fe-17Cr
P. Jussila, H. Ali-Löytty, K. Lahtonen, M. Hirsimäki, and M. Valden
Surface Science 603, 3005-3010 (2009)
2008
Kinetic hindrance during the surface oxidation of Cu(100)-c(10×2)-Ag
K. Lahtonen, M. Lampimäki, M. Hirsimäki, and M. Valden
Journal of Chemical Physics 129, 194707 (2008)
Oxygen adsorption-induced nanostructures and island formation on Cu{100}: Bridging the gap between the formation of surface confined oxygen chemisorption layer and oxide formation
K. Lahtonen, M. Hirsimäki, M. Lampimäki, and M. Valden
Journal of Chemical Physics 129, 124703 (2008)
Adsorption dynamics of O2 on Cu(100): the role of vacancies, steps and adatoms in dissociative chemisorption of O2
M. Ahonen, M. Hirsimäki, A. Puisto, S. Auvinen, M. Valden, and M. Alatalo
Chemical Physics Letters 456, 211-214 (2008)
Influence of minor alloying elements on the initial stages of oxidation of austenitic stainless steel materials
P. Jussila, K. Lahtonen, M. Lampimäki, M. Hirsimäki, and M. Valden
Surface and Interface Analysis 40, 1149-1156 (2008)
Ag/Cu(100) surface alloy and polycrystalline Cu(Ag) alloy studied by XPS
P. Jussila, K. Lahtonen, M. Lampimäki, M. Hirsimäki, M. Honkanen, T. Lepistö, P. Taskinen, and M. Valden
Surface Science Spectra 15, 31-40 (2008)
Substrate-induced effects in the creation and decay of potassium 2p core excitations in ultrathin films of KCl on copper
V. Kisand, A. Kikas, E. Kukk, E. Nõmmiste, K. Kooser, T. Käämbre, R. Ruus, M. Valden, M. Hirsimäki, P. Jussila, M. Lampimäki, H. Aksela, and S. Aksela
Journal of Physics: Condensed matter 20, 145206 (2008)
2007
Oxidation induced nanostructures on Cu{100}, Cu(Ag) and Ag/Cu{100} studied by photoelectron spectroscopy
M. Lampimäki, K. Lahtonen, M. Hirsimäki, and M. Valden
Surface and Interface Analysis 39(4), 359-366 (2007)
Substrate-induced effects in the creation and decay of core excitations in ultrathin films of potassium chloride on copper
V. Kisand, A. Kikas, K. Kooser, T. Käämbre, E. Nõmmiste, R. Ruus, M. Hirsimäki, P. Jussila, M. Lampimäki, and M. Valden
Journal of Electron Spectroscopy and Related Phenomena 156-158, 294-298 (2007)
Morphology and composition of nanoscale oxides on Fe-20Cr-18Ni{111} austenitic stainless steel
K. Mansikkamäki, U. Haapanen, C. Johans, K. Kontturi, and M. Valden
Journal of the Electrochemical Society 153(8), B311-B318 (2006)
Adsorption and diffusion dynamics of atomic and molecular oxygen on reconstructed Cu(100)
S. Jaatinen, J. Blomqvist, P. Salo, A. Puisto, M. Alatalo, M. Hirsimäki, M. Ahonen, and M. Valden
Physical Review B 75, 075402 (2007)
Nanoscale oxidation of Cu(100): Oxide morphology and surface reactivity
M. Lampimäki, K. Lahtonen, M. Hirsimäki, and M. Valden
Journal of Chemical Physics 126, 034703 (2007)
2006
Pintatieteen tutkimusta aika- ja kokoskaalat yhdistäen
M. Valden
Arkhimedes 6, 14-18 (2006)
Instrumentation and analytical methods of an x-ray photoelectron spectroscopy–scanning tunneling microscopy surface analysis system for studying nanostructured materials
M. Hirsimäki, M. Lampimäki, K. Lahtonen, I. Chorkendorff, and M. Valden
Surface Science 583(2-3), 157-165 (2005)
Rh oxide reducibility and catalytic activity of model Pt-Rh catalysts
A. Suopanki, R. Polvinen, M. Valden, and M. Härkönen
Catalysis Today 100(3-4), 327-330 (2005)