Blar i Institutt for fysikk på utgivelsesdato

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    • InAs/(Al)GaAs quantum dots for intermediate band solar cells 

      Thomassen, Sedsel Fretheim (Doktoravhandlinger ved NTNU, 1503-8181; 2012:242, Doctoral thesis, 2012)
      Intermediate band solar cells (IBSCs) have a theoretical conversion efficiency limit of 63.2%, compared to 40.7% for a single junction solar cell. The enhanced efficiency limit is due to an intermediate energy level ...

    • Characterization and structure of precipitates in 6xxx Aluminium Alloys 

      Holmestad, Randi; Bjørge, Ruben; Ehlers, Flemming J H; Torsæter, Malin; Marioara, Calin Daniel; Andersen, Sigmund Jarle (Journal article; Peer reviewed, 2012)
      Solute atom nanoscale precipitates are responsible for the favourable mechanical properties of heat treatable aluminium alloys such as Al-Mg-Si (6xxx). The shape, structure and strengthening properties of age-hardening ...

    • The Frederiks transition in an aqueous clay dispersion 

      Hemmen, Henrik; Hansen, Elisabeth Lindbo; Ringdal, Nils Ivar; Fossum, Jon Otto (Journal article; Peer reviewed, 2012)
      We show that under certain circumstances, aqueous dispersions of Na-fluorohectorite synthetic clay display transient spatially periodic structures when subjected to magnetic fields. These nematic structures result from the ...

    • On the Design of Accurate Spatial and Temporal Temperature Measurements in Sea Ice 

      Meyer, Karsten (Master thesis, 2012)
      Studies on sea ice have become increasingly popular among researchers in the last decades, due to its effect on the global climate and the challenges it presents for arctic engineering. The research is in demand of reliable ...

    • Nanostructured surfaces with patterned wettability 

      Melberg, Brita (Master thesis, 2012)
      This project aims at the fabrication of a rough polydimethylsiloxane(PDMS) surface with patterned smooth areas. The idea is that such a surface will allow for water capturing on the smooth areas of the surface. The ...

    • Numerical modelling of marine icing on offshore structures and vessels 

      Hansen, Eirik Schrøder (Master thesis, 2012)
      A numerical model for predicting icing on offshore structures and vessels has been developed and implemented. The model calculates the icing caused by freezing sea spray, and focuses on two distinct sources of spray - spray ...

    • Radiative corrections to van der Waals interaction in fluids 

      Waage, Magnus Heskestad (Master thesis, 2012)
      The van der Waals interaction energy is derived for a homogenous fluid of polarizable particles. Low-temperature corrections to the van der Waals interaction energy are computed numerically for three cases: Dilute media ...

    • Broad-band GVD Measurement of Specialty Fibers in mid-IR 

      Klimentov, Dmitry; Dvoyrin, Vladislav; Tolstik, Nikolai; Sorokina, Irina T (Chapter, 2012)
      We demonstrate a novel interferometeric setup for broad-band (>300nm) GVD measurements in short-length optical fibers in the mid-IR wavelength range using a superluminescent fiber source and investigate specialty fibers ...

    • Nanoscopic and Photonic Ultrastructural Characterization of Two Distinct Insulin Amyloid States 

      Psonka-Antonczyk, Katarzyna Maria; Duboisset, Julien; Stokke, Bjørn Torger; Zako, Tamotsu; Kobayashi, Takahiro; Maeda, Mizuo; Nyström, Sofie; Mason, Jeffrey; Hammarström, Per; Nilsson, K. Peter R.; Lindgren, Mikael (Journal article; Peer reviewed, 2012)
      Two different conformational isoforms or amyloid strains of insulin with different cytotoxic capacity have been described previously. Herein these filamentous and fibrillar amyloid states of insulin were investigated using ...

    • Spin-Polarized Non-Local Transport in Hybrid Structures with Magnetic and Superconducting Correlations 

      Stige, Kristoffer (Master thesis, 2012)
      In this thesis we theoretically examine spin-polarized non-local transport in two junctions built up by materials with superconducting and magnetic properties. The first consists of a Zeeman-split superconductor placed ...

    • Dispersion hardening during annealing at low Temperatures in four 3xxx Al-Mn-Fe-Si Alloys 

      Mørtsell, Eva Anne (Master thesis, 2012)
      3xxx aluminiumslegeringer har Mangan som hovedlegeringselement, og får sin styrke fra plastisk bearbeidelse. 3xxx legeringer har tidligere blitt ansett for å oppnå neglisjerbare endringer i hardhet og styrke som følge av ...

    • Plasmon polariton deceleration in graphene structures 

      Batrakov, K.G.; Saroka, Vasil; Maksimenko, S.A.; Thomsen, C. (Journal article; Peer reviewed, 2012)
      Surface plasmon-polariton waves with low-phase speed in carbon nanostructures can be utilized for the generation of coherent terahertz radiation through the Čerenkov mechanism, the effect being especially pronounced in ...

    • On the properties of La0.7Sr0.3MnO3 thin films on (001) SrTiO 3 substrates 

      Monsen, Åsmund Fløystad (Doktoravhandlinger ved NTNU, 1503-8181; 2012:288, Doctoral thesis, 2012)
      The performance of spintronic devices are heavily dependent on both the static and dynamic magnetic properties of both their functional interfaces and bulk properties. In this thesis work we study the stoichiometry, ...

    • Monte Carlo and film dosimetry with applications in breast cancer radiotherapy 

      Almberg, Sigrun Saur (Doktoravhandlinger ved NTNU, 1503-8181; 2012:194, Doctoral thesis, 2012)
      The purpose of the present work has been to exploit dosimetric methods and procedures for accurate quantification of dose distributions in general and for breast cancer treatments in particular. Out-of-field dose was in ...

    • Yb-Doped Fiber Lasers Operating in the Range of 1147-1200 nm 

      Dvoyrin, Vladislav; Medvedkov, OI; Sorokina, Irina T (Chapter, 2012)
      Pump source brightness and heat production per unit fiber length were found to be the critical parameters for the realized and investigated Yb-doped fiber lasers operating in the range of 1147-1200 nm.

    • The Effect of Thermophoresis on the Particle Deposition on a Cylinder 

      Lutro, Henrik Fahre (Master thesis, 2012)
      The effect of thermophoresis on the particle deposition on a cooled cylinderin non-isothermal laminar gas ow has been studied using Direct NumericalSimulations (DNS). Simulations where thermophoresis have been taken ...

    • Positive Partial Transpose States in Multipartite Quantum Systems 

      Garberg, Øyvind Steensgaard (Master thesis, 2012)
      In this master thesis I study the extremal positive partial transpose (PPT) states of the three qubit $(2times2times2)$ system using numerical methods. Using two algorithms which locate PPT states of a specified rank and ...

    • Clad-Pumped YDFLs Operating in the 1150-1200 nm Range 

      Dvoyrin, Vladislav; Medvedkov, OI; Sorokina, Irina T (Chapter, 2012)
      We demonstrate clad-pumped YDFLs operating at the 1147, 1160 and 1180 nm wavelengths at 35, 21 and 10.5 W of output power, respectively; operation at 1200 nm was realized for the first time.

    • Optimizing an Infrared Camera for Observing Atmospheric Gravity Waves from a CubeSat Platform 

      Rønning, Snorre Stavik (Master thesis, 2012)
      The NTNU Test Satellite (NUTS) is a double CubeSat deigned by master students at NTNU. The goal of the project is to image atmospheric gravity waves in the OH airglow layer. This thesis explores the theory behind gravity ...

    • Proximity effect with noncentrosymmetric superconductors 

      Annunziata, Gaetano; Manske, Dirk; Linder, Jacob (Journal article, 2012)
      We describe the superconducting proximity effect taking place in a contact between a noncentrosymmetric superconductor and a diffusive normal/ferromagnetic metal within the quasiclassical theory of superconductivity. By ...