Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 152-171 of 838

  • Defect annealing kinetics in ZnO implanted with Zn substituting elements: Zn interstitials and Li redistribution 
    Azarov, Alexander; Aarseth, Bjørn Lupton; Vines, Lasse; Hallen, Anders; Monakhov, Eduard; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    It is known that the behavior of residual Li in ion implanted ZnO depends on the preferential localization of the implants, in particular, forming characteristic Li depleted or Li pile-up regions for Zn or O sublattice ...
  • Defect formation and thermal stability of H in high dose H implanted ZnO 
    Chan, K.-S.; Vines, Lasse; Johansen, Klaus Magnus H; Monakhov, Edouard; Ye, J.D; Parkinson, P; Jagadish, C; Svensson, Bengt Gunnar; Wong-Leung, J (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    We studied the structural properties, defect formation, and thermal stability of H in hydrothermally grown ZnO single crystals implanted with H- dose ranging from 2.5×1016 to 1×1017 cm−2. H implantation is found to create ...
  • Defect level in κ-Ga2O3 revealed by thermal admittance spectroscopy 
    Langørgen, Amanda; Frodason, Ymir Kalmann; Karsthof, Robert Michael; Von Wenckstern, Holger; Jensen, Ingvild Julie Thue; Vines, Lasse; Grundmann, Marius (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Defects in pulsed-laser deposition grown have been investigated using thermal admittance spectroscopy and secondary ion mass spectrometry (SIMS). A film was grown on either a tin-doped indium oxide or an aluminum-doped ...
  • Defect self-propulsion in active nematic films with spatially varying activity 
    Rønning, Jonas; Marchetti, M. Cristina; Angheluta, Luiza (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We study the dynamics of topological defects in active nematic films with spatially varying activity and consider two set-ups: (i) a constant activity gradient and (ii) a sharp jump in activity. A constant gradient of ...
  • Defects and polaronic electron transport in Fe2WO6 
    Schuler, Raphael; Norby, Truls Eivind; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    We report the synthesis of phase pure Fe2WO6 and its structural characterization by high quality synchrotron X-ray powder diffraction, followed by studies of electric and thermoelectric properties as a function of temperature ...
  • Defects in semiconductors 
    Vines, Lasse; Monakhov, Eduard; Kuznetsov, Andrej (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
  • Deficit of homozygosity among 1.52 million individuals and genetic causes of recessive lethality 
    Oddsson, Asmundur; Sulem, Patrick; Sveinbjornsson, Gardar; Arnadottir, Gudny A.; Steinthorsdottir, Valgerdur; Halldorsson, Gisli H.; Atlason, Bjarni A.; Oskarsson, Gudjon R.; Helgason, Hannes; Nielsen, Henriette Svarre; Westergaard, David; Karjalainen, Juha; Katrinardottir, Hildigunnur; Fridriksdottir, Run; Jensson, Brynjar O.; Tragante, Vinicius; Ferkingstad, Egil; Jónsson, Hákon; Gudjonsson, Sigurjon A.; Beyter, Doruk; Moore, Kristjan H.S.; Thordardottir, Helga B.; Kristmundsdottir, Snædis; Stefansson, Olafur A.; Rantapää Dahlqvist, Solbritt; Sonderby, Ida Elken; Didriksen, Maria; Stridh, Pernilla; Haavik, Jan; Tryggvadottir, Laufey; Frei, Oleksandr; Walters, G. Bragi; Kockum, Ingrid; Hjalgrim, Henrik; Olafsdottir, Thorunn A; Selbæk, Geir; Nyegaard, Mette; Erikstrup, Christian; Brodersen, Thorsten; Sævarsdottir, Sædis; Olsson, Tomas; Nielsen, Kaspar Rene; Haraldsson, Àsgeir; Bruun, Mie Topholm; Hansen, Thomas Folkmann; Steingrimsdottir, Thora; Jacobsen, Rikke Louise; Lie, Rolv T.; Djurovic, Srdjan; Alfredsson, Lars; Portilla, A.L.; Brunak, Søren; Havdahl, Alexandra; Andreassen, Ole (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Genotypes causing pregnancy loss and perinatal mortality are depleted among living individuals and are therefore difficult to find. To explore genetic causes of recessive lethality, we searched for sequence variants ...
  • Deformation evolves from shear to extensile in rocks due to energy optimization 
    McBeck, Jessica Ann; Cordonnier, Benoit; Cooke, Michele; Fattaruso, Laura; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    Abstract Determining how fracture network development leads to macroscopic failure in heterogeneous materials may help estimate the timing of failure in rocks in the upper crust as well as in engineered structures. The ...
  • Deformation precursors to catastrophic failure in rocks 
    McBeck, Jessica Ann; Aiken, John Mark; Mathiesen, Joachim; Ben-Zion, Yehuda; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Forecasting the timing of catastrophic failure, such as crustal earthquakes, has been a central concern for centuries. Such forecasting requires identifying signals that evolve or accelerate in the precursory phase leading ...
  • Deposition and characterization of lithium doped direct current magnetron sputtered Cu2O films 
    Nyborg, Martin; Azarov, Alexander; Bergum, Kristin; Monakhov, Eduard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
  • Design of a practical and compact mm-wave MIMO system with optimized capacity and phased arrays 
    Cella, Tommaso; Orten, Pål; Ekman, Torbjörn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    In this paper we evaluate the feasibility of short range outdoor mm-wave MIMO links in the 70 GHz portion of the E-band (71–76 GHz). We use phased arrays in order to strongly reduce the impact of the multipath components, ...
  • 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 ...
  • Design, calibration, and performance of a uniaxial pressure cell for neutron scattering studies of quantum magnetism 
    Sandberg, L.I.; Haubro, M.L.; Krighaar, K.M.L.; Edberg, R.; Fjellvåg, Ingrid Marie Bakke; Guthrie, M.; Holmes, A.T.; Mangin-Thro, L.; Wildes, A.; Henelius, P.; Lefmann, K.; Deen, P.P. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    We provide an overview of a pressure cell designed to apply uniaxial pressure to single crystals for the study, by neutron scattering techniques, of strongly correlated magnetic systems and, in particular, quantum magnets. ...
  • Designing Pd and Ni Catalysts for Cross-Coupling Reactions by Minimizing Off-Cycle Species 
    Balcells, David; Nova, Ainara (Journal article / Tidsskriftartikkel / SubmittedVersion, 2018)
    This Perspective presents an overview on recent experimental and computational studies on the off-cycle reactions of palladium- and nickel-catalyzed cross-couplings. Several reactions entering or leaving the catalytic cycle ...
  • Detecting Early-Stage Cohesion Due to Calcium Silicate Hydration with Rheology and Surface Force Apparatus 
    Liberto, Teresa; Nenning, Andreas; Bellotto, Maurizio; Dalconi, Maria Chiara; Dworschak, Dominik; Kalchgruber, Lukas; Robisson, Agathe; Valtiner, Markus; Dziadkowiec, Joanna (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Extremely robust cohesion triggered by calcium silicate hydrate (C–S–H) precipitation during cement hardening makes concrete one of the most commonly used man-made materials. Here, in this proof-of-concept study, we seek ...
  • Determination of atomic positions and polar direction in half-Heusler material Sb1- xSnxTi1-y-zHfyZrzCo using electron channeling 
    Hansen, Vidar; Echevarria-Bonet, Cristina; Minde, Mona Wetrhus; Taftø, Johan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Variation of electron-induced x-ray emission with the crystal direction of an incoming electron beam (channeling) is used to study the crystal site preference of different elements in a promising thermoelectric half-Heusler ...
  • Development of crystallographic preferred orientation during cataclasis in low-temperature carbonate fault gouge 
    Demurtas, Matteo; Smith, Steven A.; Prior, D.J.; Spagnuolo, Elena; Di Toro, Giulio (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Grain size reduction due to cataclasis is a key process controlling fault frictional properties during the seismiccycle. We investigated the role of cleavage planes on fracturing and microstructural evolution during ...
  • Development of custom made bimetallic alloy model systems based on platinum-rhodium for heterogeneous catalysis 
    Kumar, Susmit; Waller, David; Fjellvåg, Helmer; Sjåstad, Anja Olafsen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The current study extends the insight into solid-state diffusion in alloys of the Platinum Group Metals (PGMs). Thereby, we pave the way for tailor making surface compositions of binary platinum (Pt) – rhodium (Rh) model ...
  • Diazotroph Genomes and Their Seasonal Dynamics in a Stratified Humic Bog Lake 
    Fernandez, Leyden; Peura, Sari; Eiler, Alexander; Linz, Alexandra M; McMahon, Kathrine D; Bertilsson, Stefan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Aquatic N-fixation is generally associated with the growth and mass development of Cyanobacteria in nitrogen-deprived photic zones. However, sequenced genomes and environmental surveys suggest active aquatic N-fixation ...
  • Different roles of environmental selection, dispersal, and drift in the assembly of intestinal microbial communities of freshwater fish with and without a stomach 
    Zha, Yinghua; Eiler, Alexander; Lindström, Eva S.; Svanback, Richard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    The composition of intestinal microbiota commonly varies among animal hosts and may affect host health. However, we have limited knowledge about the different relative roles of assembly processes, such as drift, dispersal ...