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    • Flavor Oscillations of High-Energy Neutrinos 

      Sánchez Navas, Sergio (Master thesis, 2016)
      In this thesis, we study neutrino oscillations in vacuum and in the presence of a Dark Matter halo in the Milky Way. For that purpose, first describe the particle physics of neutrinos through an historical introduction. ...

    • Vapor deposited Cr-doped ZnS thin films: Towards optically pumped mid-infrared waveguide lasers 

      Karhu, Eric Andrew; Ildstad, Charles Rutherford; Poggio, Stefano; Furtula, Vedran; Tolstik, Nikolai; Sorokina, Irina T; BelBruno, Joseph; Gibson, Ursula (Journal article; Peer reviewed, 2016)
      Compact, affordable mid-IR lasers require the development of gain materials in waveguide form. We report on the high vacuum deposition of Cr:ZnS films with concentration ranging from 1018-1020 dopants/cm3 . At low ...

    • Design of a 5-axis Manipulator for Use in Angle-Resolved Photoemission Spectroscopy 

      Kjeken, Eirik (Master thesis, 2016)
      The design of a 5-axis manipulator for use in Angle-Resolved Photoemission Spectroscopy (ARPES) is presented along with an outline of the specific challenges it was designed to adress. The theory and nomenclature of X-ray ...

    • Development of a Long-Wave Infrared Laser Source Based on Optical Parametric Amplification in ZnGeP2 

      Bakkland, Ingrid Anette (Master thesis, 2016)
      This thesis presents the design and implementation of an 8 μm laser source based on nonlinear conversion in ZGP. ZGP is an attractive material for this purpose due to its high nonlinear coefficient, good transmission at ...

    • Luminescent Eu3+-doped NaLa(WO4)(MoO4) and Ba2CaMoO6 prepared by the modified Pechini method 

      Sletnes, Malin; Skjærvø, Susanne Linn; Lindgren, Mikael; Grande, Tor; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2016)
      Modified Pechini synthesis routes were developed for synthesis of the novel red phosphor materials NaLa(WO4)(MoO4):Eu3+ and Ba2CaMoO6:Eu3+. Phase pure NaLa(WO4)(MoO4):Eu3+ was obtained at calcination temperatures ≥600 °C ...

    • Influence of oligoguluronates on alginate gelation and on alginate gel properties 

      Padoł, Anna Maria (Doctoral thesis at NTNU;2016:59, Doctoral thesis, 2016)
      Alginates are very abundant material in nature, mostly known for its gelling ability. Alginate is a family of linear copolymers of β-D-mannuronic acid and α-L-guluronic acid. Due to its biocompatibility, nontoxicity and ...

    • In-plane Fracture Front Propagation in the Thin Plate Fiber Bundle Model 

      Vågan, Jørgen (Master thesis, 2016)
      A new history independent thin plate Fiber Bundle Model is derived in or- der to model in-plane material fracture. The model provides an easy way of studying the not yet fully understood fracture processing zone. Only ...

    • Three-optical-cycle frequency comb centered around 4.2 µm using OP-GaP-based half-harmonic generation 

      Sorokin, Evgeni; Marandi, Alireza; Schunemann, PG; Fejer, M; Sorokina, Irina T; Byer, Robert L. (Chapter, 2016)
      We report a broadband mid-infrared frequency comb with three-optical-cycle pulse duration centered around 4.2 µm, with up to 220 mW average power, via OP-GaP-based half-harmonic generation pumped by mode-locked fiber lasers.

    • Rayleigh and Wood anomalies in the diffraction of light from a perfectly conducting reflection grating 

      Maradudin, AA; Simonsen, Ingve; Polanco, J; Fitzgerald, RM (Journal article; Peer reviewed, 2016)
      By means of a modal method we have calculated the angular dependence of the reflectivity and the efficiencies of several other diffracted orders of a perfectly conducting lamellar reflection grating illuminated by p-polarized ...

    • High Energy Broadband Femtosecond Pulse Generation From Tm-doped Fiber MOPA 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2016)
      We report generation of high energy (up to 280 nJ), broadband (over 450 nm between 1.95 - 2.4 µm), 200 fs pulses at 2.1 W average power directly from a Tm-fiber MOPA laser.

    • Influence of electrode gas flow rate and electrolyte composition on thermoelectric power in molten carbonate thermocell 

      Kandhasamy, Sathiyaraj; Calandrino, Luca; Burheim, Odne Stokke; Solheim, Asbjørn; Kjelstrup, Signe Helene; Haarberg, Geir Martin (Journal article, 2016)
      A thermocell (thermo-electrochemical cell) is an electrochemical system with two identical electrodes placed at different temperatures in an electrolyte solution. Ion transport between the electrodes due to the temperature ...

    • X-ray nanoscopy of a bulk heterojunction 

      Patil, Nilesh; Skjønsfjell, Eirik Torbjørn Bakken; Van den Brande, Niko; Chavez Panduro, Elvia Anabela; Claessens, Raf; Guizar-Sicairos, Manuel; Van Mele, Bruno; Breiby, Dag Werner (Journal article; Peer reviewed, 2016)
      Optimizing the morphology of bulk heterojunctions is known to significantly improve the photovoltaic performance of organic solar cells, but available quantitative imaging techniques are few and have severe limitations. ...

    • SEM, EDS and XPS Analysis of the Coatings Obtained on Titanium after Plasma Electrolytic Oxidation in Electrolytes Containing Copper Nitrate 

      Rokosz, Krzysztof; Hryniewicz, Tadeusz; Matysek, Dalibor; Raaen, Steinar; Valicek, Jan; Dudek, Lukasz; Harnicarova, Marta (Journal article; Peer reviewed, 2016)
      In the paper, the Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDS) and X-ray Photoelectron Spectroscopy (XPS) results of the surface layer formed on pure titanium after plasma electrolytic ...

    • Análise da Reflexão 001 da Níquel-Fluorohectorita por Difração de Raios X Síncrotron 

      de Oliveira, J. S.; Michels, Leander; Sousa, Marcelo Henrique; Fossum, Jon Otto; Da Silva, G.J.; Mundim, Kleber Carlos; Ribeiro, L. (Journal article; Peer reviewed, 2016)
      In the present work X-ray diffraction was used in order to observe the stable hydration states of the clay nickel-fluorohectorite. The diffraction patterns were measured as function of relative humidity and temperature. ...

    • Augmenting drug-carrier compatibility improves tumour nanotherapy efficacy 

      Zhao, Yiming; Fay, Francois; Hak, Sjoerd; Manuel Perez-Aguilar, Jose; Sanchez-Gaytan, Brenda L; Goode, Brandon; Duivenvoorden, Raphael; Davies, Ruth Catharina de Lange; Bjørkøy, Astrid; Weinstein, Harel; Fayad, Zahi A; Perez-Medina, Carlos; Mulder, Willem J M (Journal article; Peer reviewed, 2016)
      A major goal of cancer nanotherapy is to use nanoparticles as carriers for targeted delivery of anti-tumour agents. The drug–carrier association after intravenous administration is essential for efficient drug delivery to ...

    • Strengthening mechanisms in ultrafine grained Al-Mg-Si alloy processed by hydrostatic extrusion – Influence of ageing temperature 

      Chrominski, Witold; Wenner, Sigurd; Marioara, Calin Daniel; Holmestad, Randi; Lewandowska, Malgorzata (Journal article, 2016)
      Microstructure of hydrostatically extruded Al-Mg-Si alloy was studied by the combination of electron backscattered diffraction and transmission electron microscopy. Three different grain types which feature various defects ...

    • Versatile, cell and chip friendly method to gel alginate in microfluidic devices 

      Håti, Armend Gazmeno; Bassett, David; Ribe, Jonas Myren; Sikorski, Pawel; Weitz, David A.; Stokke, Bjørn Torger (Journal article, 2016)
      Alginate is used extensively in microfluidic devices to produce discrete beads or fibres at the microscale. Such structures may be used to encapsulate sensitive cargoes such as cells and biomolecules. On chip gelation of ...

    • Superconductivity in Dirac Materials 

      Sjømark, Severin Bøyesen (Master thesis, 2016)
      In this Master s thesis we consider superconductivity in Bravais and bipartite lattice fermion models with nearest neighbour hopping and Rashba-type spin-orbit coupling. The superconductivity is modelled from a negative-U ...

    • α-Mg primary phase formation and dendritic morphology transition in solidification of a Mg-Nd-Gd-Zn-Zr casting alloy 

      Casari, Daniele; Mirihanage, Wajira; Falch, Ken Vidar; Ringdalen, Inga Gudem; Friis, Jesper; Schmid-Fetzer, Rainer; Zhao, Dongdong; Li, Yanjun; Sillekens, Wim H.; Mathiesen, Ragnvald (Journal article; Peer reviewed, 2016)
      Microstructure evolution in the commercial Mg-Nd-Gd-Zn-Zr alloy Elektron 21, solidified under nearly isothermal conditions, has been studied via in-situ X-ray radiography. For cooling rates View the MathML source≤0.075 ...

    • Normal and superfluid spin dynamics in magnetic insulator heterostructures 

      Skarsvåg, Hans Langva (Doctoral theses at NTNU;2016:334, Doctoral thesis, 2016)
      Summary of thesis: Normal and superfluid spin dynamics in magnetic insulator heterostructures In this thesis, the results of six research papers on spintronics-related effects are presented. The main focus is on ...