Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 772-791 of 838

  • Thermoelectric properties of A-site deficient La-doped SrTiO3 at 100–900 °C under reducing conditions 
    Singh, Sathya Prakash; Kanas, Nikola; Desissa, Temesgen Debelo; Johnsson, Mats; Einarsrud, Mari-Ann; Norby, Truls Eivind; Wiik, Kjell (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Lanthanum doped strontium titanate is a potential n-type thermoelectric material at moderate and high temperatures. (La0.12Sr0.88)0.95TiO3 ceramics were prepared by two different routes, conventional sintering at 1500 °C ...
  • Thermoelectric properties of non-stoichiometric CaMnO3-d composites formed by redox-activated exsolution. 
    Singh, Sathya Prakash; Kanas, Nikola; Desissa, Temesgen Debelo; Einarsrud, Mari-Ann; Norby, Truls Eivind; Wiik, Kjell (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    A novel synthesis route for preparing well-defined composites based on CMO (CaMnO3) has been established taking advantage of the unique phase relations in the system Ca-Mn-O at reducing- and oxidizing atmosphere, respectively. ...
  • Thermoelectric transport trends in group 4 half-Heusler alloys 
    Berland, Kristian; Shulumba, Nina; Hellman, Olle; Persson, Clas; Løvvik, Ole Martin (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    The thermoelectric properties of 54 different group 4 half-Heusler (HH) alloys have been studied from first principles. Electronic transport was studied with density functional theory using hybrid functionals facilitated ...
  • Thermohydrological Impact of Forest Disturbances on Ecosystem-Protected Permafrost 
    Stuenzi, Simone Maria; Kruse, Stefan; Boike, Julia; Herzschuh, Ulrike; Oehme, Alexander; Pestryakova, Luidmila A.; Westermann, Sebastian; Langer, Moritz (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Boreal forests cover over half of the global permafrost area and protect underlying permafrost. Boreal forest development, therefore, has an impact on permafrost evolution, especially under a warming climate. Forest ...
  • Thin films made by reactive sputtering of high entropy alloy FeCoNiCuGe: Optical, electrical and structural properties 
    Mayandi, Jeyanthinath; Finstad, Terje Gunnar; Dahl, Øyvind; Ponniah, Vajeeston; Schrade, Matthias; Løvvik, Ole Martin; Diplas, Spyridon; Almeida Carvalho, Patricia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Films were reactively sputtered from a high entropy alloy (HEA) FeCoNiCuGe target in an Ar/O2 plasma. The case of zero O2 gas flow yielded HEA films of FeCoNiCuGe. These as-deposited HEA films have a face centered cubic ...
  • Thio-olivine Mn2SiS4 thin films by reactive magnetron sputtering: Structural and optical properties with insights from first principles calculations 
    Davydova, A; Eriksson, J; Chen, Rongzhen; Rudisch, K; Persson, Clas; Scragg, Jonathan (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    Thio-olivines such as (Fe,Mn)2(Si,Ge)S4 have been proposed as candidate earthabundant materials for single and multi-junction solar cells. In this work we present the first investigation of Mn2SiS4thin films prepared by ...
  • Ti- and Fe-related charge transition levels in beta-Ga2O3 
    Zimmermann, Christian; Frodason, Ymir Kalmann; Barnard, Abraham Willem; Varley, Joel B; Irmscher, Klaus; Galazka, Zbigniew; Karjalainen, Antti; Meyer, Walter Ernst; Auret, F.D.; Vines, Lasse (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Deep-level transient spectroscopy measurements on β-Ga2O3 crystals reveal the presence of three defect signatures labeled E2a, E2b, and E3 with activation energies at around 0.66 eV, 0.73 eV, and 0.95 eV below the conduction ...
  • Time-enhanced performance of oxide thermoelectric modules based on a hybrid p-n junction 
    Kanas, Nikola; Bjørk, Rasmus; Wells, Kristin Høydalsvik; Schuler, Raphael; Einarsrud, Mari-Ann; Pryds, Nini; Wiik, Kjell (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The present challenge with all-oxide thermoelectric modules is their poor durability at high temperatures caused by the instability of the metal-oxide interfaces at the hot side. This work explains a new module concept ...
  • TiO2 as a Photocatalyst for Water Splitting—An Experimental and Theoretical Review 
    Eidsvåg, Håkon; Bentouba, Said; Vajeeston, Ponniah; Shivatharsiny, Yohi; Velauthapillai, Dhayalan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Abstract: Hydrogen produced from water using photocatalysts driven by sunlight is a sustainable way to overcome the intermittency issues of solar power and provide a green alternative to fossil fuels. TiO2 has been used ...
  • Titration of Cu(I) Sites in Cu-ZSM-5 by Volumetric CO Adsorption 
    Deplano, Gabriele; Signorile, Matteo; Crocellà, Valentina; Porcaro, Natale Gabriele; Atzori, Cesare; Solemsli, Bjørn Gading; Svelle, Stian; Bordiga, Silvia (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Cu-exchanged zeolites are widely studied materials because of their importance in industrial energetic and environmental processes. Cu redox speciation lies at the center of many of these processes but is experimentally ...
  • Topology-guided polar ordering of collective cell migration 
    Lång, Emma Helena; Lång, Anna Ulrika; Blicher, Pernille; Rognes, Torbjørn; Dommersnes, Paul Gunnar; Bøe, Stig Ove (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    The ability of epithelial monolayers to self-organize into a dynamic polarized state, where cells migrate in a uniform direction, is essential for tissue regeneration, development, and tumor progression. However, the ...
  • Total Scattering Study of Local Structural Changes in MnAs1-xPx Influenced by Magnetic Interactions 
    Saha, Dipankar; Kumar, Susmit; Gonano, Bruno Raymond Gino; Sjåstad, Anja Olafsen; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    The interplay between fluctuations of the local structure and magnetic interactions is of great importance for phenomena like superconductivity, colossal magnetoresistance, and frustrated magnetism. Such local distortions ...
  • Toward Atomistic Understanding of Materials with the Conversion–Alloying Mechanism in Li-Ion Batteries 
    Park, Heesoo; van Duin, Adri C. T.; Koposov, Alexey (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The need for practical anodes for rechargeable batteries calls for new materials with improved storage capacity and cycling stability compared to the materials of today. Materials capable of alloying with alkali metals ...
  • Towards bone regeneration: Understanding the nucleating ability of proline-rich peptides in biomineralisation 
    Øvrebø, Øystein; De Lauretis, Angela; Ma, Qianli; Perale, Giuseppe; Nilsen, Ola; Rossi, Filippo; Haugen, Håvard Jostein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
    Obtaining rapid mineralisation is a challenge in current bone graft materials, which has been attributed to the difficulty of guiding the biological processes towards osteogenesis. Amelogenin, a key protein in enamel ...
  • Tracing North Atlantic volcanism and seaway connectivity across the Paleocene–Eocene Thermal Maximum (PETM) 
    Jones, Morgan Thomas; Stokke, Ella Wulfsberg; Svensen, Henrik Hovland; Planke, Sverre; Vickers, Madeleine Larissa (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract. There is a temporal correlation between the peak activity of the North Atlantic Igneous Province (NAIP) and the Paleocene–Eocene Thermal Maximum (PETM), suggesting that the NAIP may have initiated and/or prolonged ...
  • Tracking Lithiation of Si-Based Anodes in Real Time by Total Scattering Computed Tomography 
    Wragg, David Stephen; Skautvedt, Casper; Brennhagen, Anders; Geiss, Carina; Checchia, Stefano; Koposov, Alexey (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    The existing set of characterization tools does not permit a full description of the three-dimensional (3D) structure and operating mechanisms of amorphous, low-scattering alloying active materials in metal-ion batteries. ...
  • Tracking Structural Deactivation of H-Ferrierite Zeolite Catalyst During MTH with XRD 
    Berdiell, Izar Capel; Braghin, Giorgio Bruno; Cordero-Lanzac, Tomas; Beato, Pablo; Lundegaard, Lars F.; Wragg, David Stephen; Bordiga, Silvia; Svelle, Stian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract We used the methanol-to-hydrocarbon (MTH) reaction as a shape-selective model reaction to investigate coke formation in zeolite H-Ferrierite. Despite being a 2D topology in terms of channel propagation, the FER ...
  • Trajectories of freshwater microbial genomics and greenhouse gas saturation upon glacial retreat 
    Wei, Jing; Fontaine, Laurent; Valiente Parra, Nicolas; Dörsch, Peter; Hessen, Dag Olav; Eiler, Alexander (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Due to climate warming, ice sheets around the world are losing mass, contributing to changes across terrestrial landscapes on decadal time spans. However, landscape repercussions on climate are poorly constrained ...
  • Transient electrohydrodynamic flow with concentration-dependent fluid properties: Modelling and energy-stable numerical schemes 
    Linga, Gaute; Bolet, Asger; Mathiesen, Joachim (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Transport of electrolytic solutions under influence of electric fields occurs in phenomena ranging from biology to geophysics. Here, we present a continuum model for single-phase electrohydrodynamic flow, which can be ...
  • Transient High Strain Rate During Localized Viscous Creep in the Dry Lower Continental Crust (Lofoten, Norway) 
    Campbell, Lucy; Menegon, Luca (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Understanding the ability of the lower crust to support transient changes in stresses and strain rates during the earthquake cycle requires a detailed investigation of the deformation mechanisms and rheology of deep crustal ...