Browsing Kjemisk institutt by Author "Nilsen, Ola"

Now showing items 1-20 of 43

  • A CMOS Multi-Electrode Array for Four-Electrode Bioimpedance Measurements 
    Nøvik, Steffen; Flø Drageseth, Magnus; Grøndalen, Magnus Børresen; Nilsen, Ola; Krauss, Stefan Johannes Karl; Martinsen, Ørjan Grøttem; Häfliger, Philipp Dominik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    This work demonstrates how a multi-electrode array (MEA) dedicated to four-electrode bioimpedance measurements can be implemented on a complementary metal–oxide–semiconductor (CMOS) chip. As a proof of concept, an 8 × 8 ...
  • Al incorporation during metal organic chemical vapour deposition of aluminium zinc oxide 
    Ellingsen, Josef Gert Åsheim; Venkatachalapathy, Vishnukanthan; Azarov, Alexander; Nilsen, Ola; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aluminium zinc oxide (AZO) is a promising transparent conductive oxide this is difficult to fabricate by metal-organic chemical vapour deposition (MOCVD) because of prereactions between the precursors for Al and oxygen. ...
  • Aromatic sensitizers in luminescent hybrid films 
    Hansen, Per-Anders Stensby; Svendsen, Joachim; Nesteng, Hanne Martinsen; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Atomic layer deposition offers a unique set of design possibilities due to the vast range of metal and organic precursors that can be used and combined. In this work, we have combined lanthanides with aromatic aids as ...
  • Atomic layer deposition of (K,Na)(Nb,Ta)O3 thin films 
    Sønsteby, Henrik Hovde; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Thin films of complex alkali oxides are frequently investigated due to the large range of electric effects that are found in this class of materials. Their piezo- and ferroelectric properties also place them as sustainable ...
  • Atomic layer deposition of ferroelectric LiNbO3 
    Østreng, Erik; Sønsteby, Henrik H.; Sajavaara, Timo; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / Published version; Peer reviewed, 2013)
    The ferroelectric and electro-optical properties of LiNbO3 make it an important material for current and future applications. It has also been suggested as a possible lead-free replacement for present PZT-devices. The ...
  • Atomic Layer Deposition of GdCoO3 and Gd0.9Ca0.1CoO3 
    Duparc, Marion Jeanne Louise; Sønsteby, Henrik Hovde; Nilsen, Ola; Sjåstad, Anja Olafsen; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Thin films of the catalytically interesting ternary and quaternary perovskites GdCoO3 and Gd0.9Ca0.1CoO3 are fabricated by atomic layer deposition using metal β-diketonates and ozone as precursors. The resulting thin films ...
  • Atomic layer deposition of sodium and potassium oxides: evaluation of precursors and deposition of thin films 
    Østreng, Erik; Sønsteby, Henrik H.; Øien, Sigurd; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    Thin films of sodium and potassium oxides have for the first time been deposited using atomic layer deposition. Sodium and potassium complexes of tert-butanol, trimethylsilanol and hexamethyldisilazide have been evaluated ...
  • Avoiding water reservoir effects in ALD of functional complex alkali oxides by using O3 as the oxygen source 
    Sønsteby, Henrik Hovde; Killi, Veronica Anne-Line Kathrine; Rykkje, Linn Margrethe; Bickford, Justin R.; Martin, Eric G.; Hoffman, Robert C.; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    A new ozone-based route for excellent control of complex alkali oxides by ALD.
  • Bioactive titaminates from molecular layer deposition 
    Momtazi, Leva; Sønsteby, Henrik Hovde; Dartt, DA; Eidet, Jon Roger; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Organic–inorganic hybrid materials are an emerging class of materials suitable for deposition by the molecular layer deposition (MLD) technique. Their toolbox is now expanded to include linkers of amino acids, which when ...
  • Biocompatible organic-inorganic hybrid materials based on nucleobases and titanium developed by molecular layer deposition 
    Momtazi, Leva; Sønsteby, Henrik Hovde; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We have constructed thin films of organic–inorganic hybrid character by combining titanium tetra-isopropoxide (TTIP) and the nucleobases thymine, uracil or adenine using the molecular layer deposition (MLD) approach. Such ...
  • Chemical Uniformity in Ferroelectric KxNa1−xNbO3 Thin Films 
    Sønsteby, Henrik Hovde; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Potassium sodium niobate (KNN) has long been considered a viable candidate for replacing lead‐based materials in piezo‐ and ferroelectric devices. The introduction of KNN on an industrial scale is highly awaited; however, ...
  • Control of growth orientation in as-deposited epitaxial iron-rich nickel ferrite spinel 
    Bratvold, Jon E.; Sønsteby, Henrik Hovde; Nilsen, Ola; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The authors here report epitaxial growth of the ferrimagnet NixFe3–xO4 (NFO) by atomic layer deposition at low temperatures. Films grow epitaxially at a reactor temperature of 250 °C and require no further postannealing ...
  • Controlling luminescence and quenching mechanisms in subnanometer multilayer structure of europium titanate thin films 
    Hansen, Per-Anders Stensby; Granerød, Cecilie Skjold; Prytz, Øystein; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    We have investigated how layered structures of TiO2 and Eu2O3 on the subnanometer scale control the optical absorption, energy transfer, emission and quenching mechanisms in sensitized lanthanide luminescence systems. By ...
  • Design of experiments approach to luminescent CaMoO4 by atomic layer deposition 
    Kvalvik, Julie Nitsche; Hansen, Per-Anders Stensby; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Atomic layer deposition (ALD) is evolving beyond binary compounds to complex oxides and doped structures, taking advantage of the nanometer precision ALD provides. In practice, the development of complex ALD-processes ...
  • Effect of Subcycle Arrangement on Direct Epitaxy in ALD of LaNiO3 
    Sønsteby, Henrik Hovde; Skaar, Erik; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Monolithic device integration of crystalline complex oxide thin films can open for smarter and more sustainable devices in electronics and energy technology. However, the facile integration of such compounds has so far ...
  • Electrochemically Assisted Growth of Hopper and Tabular Calcite under Confinement 
    Dziadkowiec, Joanna; Linga, Gaute; Kalchgruber, Lukas; Kavunga, Sunil; Cheng, Hsiu-Wei; Nilsen, Ola; Campsteijn, Coen; Pokroy, Boaz; Valtiner, Markus (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    Crystallization under confinement is commonplace in nature and offers new pathways to engineer crystals with the desired morphologies in a controlled and reproducible manner. In this work, we demonstrate the electrochemically ...
  • A foundation for complex oxide electronics -low temperature perovskite epitaxy 
    Sønsteby, Henrik H.; Skaar, Erik; Fjellvåg, Øystein; Bratvold, Jon E.; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    As traditional silicon technology is moving fast towards its fundamental limits, all-oxide electronics is emerging as a challenger offering principally different electronic behavior and switching mechanisms. This technology ...
  • High power iron phosphate cathodes by atomic layer deposition 
    Brennhagen, Anders; Kvamme, Kristian Breivik; Sverdlilje, Katja S. S.; Nilsen, Ola (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Amorphous thin films of FePO4 and Fe4(P2O7)3 show excellent power capabilities and good stability as cathode materials in Li-ion batteries. Within our tested range of materials, 10 nm FePO4 shows the best results and can ...
  • Intense NIR emission in YVO4:Yb3+ thin films by atomic layer deposition 
    Getz, Michael; Hansen, Per-Anders Stensby; Fjellvåg, Øystein Slagtern; Ahmed, Mohammed Amin Karim; Fjellvåg, Helmer; Nilsen, Ola (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    We demonstrate controlled deposition by atomic layer deposition of YVO4:Yb3+ thin films exhibiting an intense NIR emission under UV excitation after post-deposition annealing at 1000 °C. The samples are deposited using the ...
  • Interrogation of the Interfacial Energetics at a Tantalum Nitride/Electrolyte Heterojunction during Photoelectrochemical Water Splitting by Operando Ambient Pressure X-ray Photoelectron Spectroscopy 
    Dahl, Øystein; Sunding, Martin Fleissner; Killi, Veronica Anne-Line Kathrine; Svenum, Ingeborg-Helene; Grandcolas, Mathieu; Andreassen, Magnus; Nilsen, Ola; Thøgersen, Annett; Jensen, Ingvild Julie Thue; Chatzitakis, Athanasios (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Photoelectrochemical (PEC) water electrolysis is an important energy conversion (power-to-chemical) method, providing a solution to the intermittent nature of solar energy. However, as PEC systems usually suffer from low ...