Browsing Det matematisk-naturvitenskapelige fakultet by Title

Now showing items 286-305 of 838

  • First-Principles Analyses of Nanoionic Effects at Oxide-Oxide Heterointerfaces for Electrochemical Applications 
    Saeed, Sarmad Waheed; Norby, Truls; Bjørheim, Tor S. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Defect segregation at homo- and heterointerfaces enables heterogeneous doping of functional nanocomposites for enhanced charge and mass transport or storage properties compared to homogeneously doped bulk materials. The ...
  • First-principles calculations of Stark shifts of electronic transitions for defects in semiconductors: the Si vacancy in 4H-SiC 
    Bathen, Marianne Etzelmüller; Vines, Lasse; Coutinho, José (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Point defects in solids are promising single-photon sources with application in quantum sensing, computing and communication. Herein, we describe a theoretical framework for studying electric field effects on defect-related ...
  • First-Principles Insights into the Relative Stability and Physical and Chemical Properties of MoSe2 
    Banu S, Lathifa; Veerapandy, Vasu; Fjellvåg, Helmer; Ponniah, Vajeeston (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
    A fascinating transition-metal dichalcogenide (TMDC) compound, MoSe2, has attracted a lot of interest in electrochemical, photocatalytic, and optoelectronic systems. However, detailed studies on the structural stability ...
  • First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs 
    Vajeeston, Ponniah; Bianchini, Federico; Fjellvåg, Helmer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    In recent years, the scientific community has shown an increasing interest in regards to the investigation of novel materials for the intercalation of lithium atoms, suitable for application as cathodes in the new generations ...
  • Fish AI: Sustainable Commercial Fishing 
    Nordmo, Tor-Arne Schmidt; Kvalsvik, Ove; Kvalsund, Svein Ove; Hansen, Birte; Halvorsen, Pål; Hicks, Steven; Johansen, Dag; Johansen, Håvard D.; Riegler, Michael Alexander (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Sustainable Commercial Fishing is the second challenge at the Nordic AI Meet following the successful MedAI, which had a focus on medical image segmentation and transparency in machine learning (ML)-based systems. FishAI ...
  • Flow around topological defects in active nematic films 
    Rønning, Jonas; Marchetti, Cristina M.; Bowick, Mark J.; Angheluta, Luiza (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We study the active flow around isolated defects and the self-propulsion velocity of +1/2 defects in an active nematic film with both viscous dissipation (with viscosity η) and frictional damping Γ with a substrate. The ...
  • Fluid-mediated, brittle-ductile deformation at seismogenic depth – Part 2: Stress history and fluid pressure variations in a shear zone in a nuclear waste repository (Olkiluoto Island, Finland) 
    Prando, Francesca; Menegon, Luca; Anderson, Mark W; Marchesini, Barbara; Mattila, Jussi; Viola, Giulio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Abstract. The microstructural record of fault rocks active at the brittle–ductile transition zone (BDTZ) may retain information on the rheological parameters driving the switch in deformation mode and on the role of stress ...
  • Fluid-mediated, brittle–ductile deformation at seismogenic depth – Part 1: Fluid record and deformation history of fault veins in a nuclear waste repository (Olkiluoto Island, Finland) 
    Marchesini, Barbara; Garofalo, Paolo Stefano; Menegon, Luca; Mattila, Jussi; Viola, Giulio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    The dynamic evolution of fault zones at the seismogenic brittle–ductile transition zone (BDTZ) expresses the delicate interplay between numerous physical and chemical processes. Deformation and fluid flow at the BDTZ are ...
  • Formation and Characterization of Shallow Junctions in GaAs Made by Ion Implantation and ms-Range Flash Lamp Annealing 
    Duan, Juanmei; Wang, Mao; Vines, Lasse; Bottger, Roman; Helm, Manfred; Zeng, Yu-Jia; Zhou, Shengqiang; Prucnal, Slawomir (Journal article / Tidsskriftartikkel / SubmittedVersion, 2019)
    With the demand of aggressive scaling in nanoelectronics, further progress can be realized by integration of high mobility semiconductors, such as III–V compound semiconductors, with complementary metal‐oxide‐semiconductor ...
  • Formation and control of the E2* center in implanted b-Ga2O3 by reverse-bias and zero-bias annealing 
    Zimmermann, Christian; Verhoeven, Espen Førdestrøm; Frodason, Ymir Kalmann; Weiser, Philip Michael; Varley, Joel B; Vines, Lasse (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
    Deep-level transient spectroscopy measurements are conducted on β-Ga2O3 thin-films implanted with helium and hydrogen (H) to study the formation of the defect level E2 lowast (EA = 0.71 eV) during heat treatments under an ...
  • Formation and control of the E2* center in implanted b-Ga2O3 by reverse-bias and zero-bias annealing 
    Zimmermann, Christian; Verhoeven, Espen Førdestrøm; Frodason, Ymir Kalmann; Weiser, Philip Michael; Varley, Joel B; Vines, Lasse (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Deep-level transient spectroscopy measurements are conducted onβ-Ga2O3thin-filmsimplanted with helium and hydrogen (H) to study the formation of the defect levelE∗2(EA=0.71 eV) during heat treatments under an applied ...
  • Formation and functionalization of Ge-nanoparticles in ZnO 
    Aarseth, Bjørn Lupton; Granerød, Cecilie Skjold; Galeckas, Augustinas; Azarov, Alexander; Nguyen, Phuong Dan; Prytz, Øystein; Vines, Lasse (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
    Semiconductor nanocrystals are often proposed as a viable route to improve solar energy conversion in photovoltaics and photoelectrochemical systems. Embedding the nanocrystals in, e.g. a transparent and conducting electrode ...
  • Formation and functioning of bimetallic nanocatalysts: The power of X-ray probes 
    Filez, Matthias; Redekop, Evgeniy; Dendooven, Jolien; Ramachandran, Ranjith K.; Solano, Eduardo; Olsbye, Unni; Weckhuysen, Bert M.; Galvita, Vladimir V.; Poelman, Hilde; Detavernier, Christophe; Marin, Guy B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Bimetallic nanocatalysts are key enablers of current chemical technologies, including car exhaust converters and fuel cells, and play a crucial role in industry to promote a wide range of chemical reactions. However, owing ...
  • Formation of carbon interstitial-related defect levels by thermal injection of carbon into n-type 4H-SiC 
    Karsthof, Robert Michael; Bathen, Marianne Etzelmüller; Kuznetsov, Andrej; Vines, Lasse (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2022)
    Electrical properties of point defects in 4𝐻-SiC have been studied extensively, but those related to carbon interstitials (Ci) have remained elusive until now. Indeed, when introduced via ion irradiation or implantation, ...
  • Formation of carbon vacancy in 4H Silicon Carbide during high-temperature processing 
    Ayedh, Hussein Mohammed Hussein; Bobal, Viktor; Nipoti, R; Hallen, Anders; Svensson, Bengt Gunnar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    As-grown and pre-oxidized silicon carbide (SiC) samples of polytype 4H have been annealed at temperatures up to 1950 °C for 10 min duration using inductive heating, or at 2000 °C for 30 s using microwave heating. The samples ...
  • Formation of N2 bubbles along grain boundaries in (ZnO)1−x(GaN)x: nanoscale STEM-EELS studies 
    Bazioti, Kalliopi; Olsen, Vegard Skiftestad; Kuznetsov, Andrej; Vines, Lasse; Prytz, Øystein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    Direct evidence of N2 formation after annealing of (ZnO)1−x(GaN)x alloys was revealed. N2 was trapped by VZn+Ga-clusters, forming faceted voids along grain boundaries. This study shows that N–N bonding is a competitive ...
  • Formation of γ-Ga2O3 by ion implantation: Polymorphic phase transformation of β-Ga2O3 
    Garcia Fernandez, Javier; Kjeldby, Snorre Braathen; Nguyen, Phuong Dan; Karlsen, Ole Bjørn; Vines, Lasse; Prytz, Øystein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    Ion implantation induced phase transformation and the crystal structure of a series of ion implanted β-Ga 2 O 3 samples were studied using electron diffraction, high resolution transmission electron microscopy, and scanning ...
  • Fotokjemiske strategier for behandling av kolangiokarsinom 
    Ali, Jaweria (Master thesis / Masteroppgave, 2023)
    Kreft er den nest største dødsårsaken i verden, der utvikling av resistens mot ulike kjemoterapeutikum spiller en stor rolle for sykdommens negative progresjon. Forskning og utvikling av nye effektive behandlinger av kreft ...
  • Four-dimensional X-ray micro-tomography imaging of dynamic processes in geosciences 
    Noiriel, Catherine; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    The dynamic response of rocks to thermal, hydrodynamical, mechanical, and geochemical solicitations is of fundamental interest in several disciplines of geosciences, including geo-engineering, geophysics, rock physics, ...
  • Fracture Network Localization Preceding Catastrophic Failure in Triaxial Compression Experiments on Rocks 
    McBeck, Jessica Ann; Ben-Zion, Yehuda; Renard, Francois (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    We quantify the spatial distribution of fracture networks throughout six in situ X-ray tomography triaxial compression experiments on crystalline rocks at confining stresses of 5–35 MPa in order to quantify how fracture ...