Now showing items 952-971 of 1040

    • The thermal boundary resistance at semiconductor interfaces: a critical appraisal of the Onsager vs. Kapitza formalisms 

      Rurali, Riccardo; Cartoixà, Xavier; Bedeaux, Dick; Kjelstrup, Signe; Colombo, Luciano (Journal article; Peer reviewed, 2018)
      We critically readdress the definition of thermal boundary resistance at an interface between two semiconductors. By means of atomistic simulations we provide evidence that the widely used Kapitza formalism predicts thermal ...
    • Thermal conductivity and internal temperature profiles of Li-ion secondary batteries 

      Richter, Frank; Kjelstrup, Signe; Vie, Preben Joakim Svela; Burheim, Odne Stokke (Journal article, 2017)
      In this paper we report the thermal conductivity for several battery components. Materials were obtained from several electrode- and separator suppliers, and some were extracted from commercial batteries. We measured with ...
    • Thermal conductivity and temperature profiles in carbon electrodes for supercapacitors 

      Burheim, Odne Stokke; Aslan, M; Atchison, JS; Presser, V (Journal article, 2014)
      The thermal conductivity of supercapacitor film electrodes composed of activated carbon (AC), AC with 15 mass% multi-walled carbon nanotubes (MWCNTs), AC with 15 mass% onion-like carbon (OLC), and only OLC, all mixed with ...
    • Thermal conductivity of carbon dioxide from non-equilibrium molecular dynamics: a systematic study of several common force fields 

      Trinh, Thuat; Vlugt, Thijs J.H.; Kjelstrup, Signe (Journal article; Peer reviewed, 2014)
      We report a systematic investigation of the thermal conductivity of various three-site models of carbon dioxide (CO2) using nonequilibrium molecular dynamics in the temperature range 300–1000 K and for pressures up to 200 ...
    • Thermal Conductivity of Molten Carbonates with Dispersed Solid Oxide from Differential Scanning Calorimetry 

      Kandhasamy, Sathiyaraj; Støre, Anne; Haarberg, Geir Martin; Kjelstrup, Signe; Solheim, Asbjørn (Journal article; Peer reviewed, 2019)
      Recently, there has been a noticeable increase in the applications of composite mixtures containing molten salt and solid oxide for thermal energy conversion and storage systems. This highlights that thermal conductivity ...
    • Thermal Conductivity, Heat Sources and Temperature Profiles of Li-ion Batteries 

      Burheim, Odne Stokke; Onsrud, Morten Andreas; Pharoah, John George; Vullum-Bruer, Fride; Vie, Preben Joakim Svela (Journal article; Peer reviewed, 2014)
      In this paper we report the thermal conductivity of several commercial and non-commercial Li-ion secondary battery electrode materials with and without electrolytesolvents. We also measure the Tafel potential, the ohmic ...
    • Thermal transport in polyethylene: The effect of force fields and crystallinity 

      Sæther, Sandra; Erichsen, Merete Falck; Zhang, Zhiliang; Lervik, Anders; He, Jianying (Peer reviewed; Journal article, 2021)
      In this article, we study the local structure and heat transfer properties (thermal conductivity and interfacial conductance) in model semi-crystalline Polyethylene (PE) by non-equilibrium molecular dynamics. We compare ...
    • Thermo-molecular orientation effects in fluids of dipolar dumbbells 

      Daub, Christopher David; Åstrand, Per-Olof; Bresme, Fernando (Journal article, 2014)
      We use molecular dynamics simulations in applied thermal gradients to study thermomolecular orientation (TMO) of size-asymmetric dipolar dumbbells with different molecular dipole moments. We find that the direction of the ...
    • Thermo-osmosis in membrane systems: a review 

      Barragán, V. María; Kjelstrup, Signe (Journal article; Peer reviewed, 2017)
      We give a first review of experimental results for a phenomenon little explored in the literature, namely thermal osmosis or thermo-osmosis. Such systems are now getting increased attention because of their ability to use ...
    • Thermodynamic Characterization Of Two Layers Of CO2 On A Graphite Surface 

      Trinh, Thuat; Bedeaux, Dick; Simon, Jean-Marc; Kjelstrup, Signe (Journal article; Peer reviewed, 2014)
      We find by examination of density profiles that carbon dioxide adsorbs on graphite in two distinct layers. We report the activity coefficient, entropy and enthalpy for CO2 in each layer using a convenient computational ...
    • Thermodynamic Properties of Hydrogen Dissociation Reaction from the Small System Method and Reactive Force Field ReaxFF 

      Trinh, Thuat; Eriksen, Nora Meling; Bedeaux, Dick; Kjelstrup, Signe (Journal article, 2017)
      We present thermodynamic properties of the H2 dissociation reaction by means of the Small System Method (SSM) using Reactive Force Field (ReaxFF) simulations. Thermodynamic correction factors, partial molar enthalpies and ...
    • Thermodynamic properties of the 3D Lennard-Jones/spline model 

      Hafskjold, Bjørn; Travis, Karl; Bailey, Amanda H.; Hammer, Morten; Aasen, Ailo; Wilhelmsen, Øivind (Peer reviewed; Journal article, 2019)
      In the Lennard-Jones spline (LJ/s) model, the Lennard-Jones (LJ) potential is truncated and splined so that both the pair potential and the force continuously approach zero at rc ≈ 1.74σ. It exhibits the same structural ...
    • Thermoelectric Power of Ion Exchange Membrane Cells Relevant to Reverse Electrodialysis Plants 

      Kristiansen, Kim; Barragán, V. María; Kjelstrup, Signe (Journal article; Peer reviewed, 2019)
      A thermoelectric cell is designed and experiments are carried out in order to measure Seebeck coefficients of ion exchange membranes at different constant concentrations of NaCl in water. The purpose of the investigation ...
    • Thermoelectric Properties of Non-Aqueous Electrochemical Cells - Local Reversible Heat Effects Relevant for Lithium Ion Batteries 

      Gunnarshaug, Astrid Fagertun (Master thesis, 2018)
      The aim of this thesis was to investigate the thermoelectric properties and local reversible heat effects of cells relevant to lithium-ion batteries. The theory of non-equilibrium thermodynamics and experimental measurements ...
    • Thermoelectrochemical Cell with Molten Carbonate Electrolyte 

      Haarberg, Geir Martin; Kandhasamy, Sathiyaraj; Kjelstrup, Signe Helene; Solheim, Asbjørn (Journal article, 2017)
      Industrial processes for production of metals and alloys by metallurgical and electrochemical methods generate a lot of heat due to irreversible losses. The waste heat should be used to generate electricity. Commercial ...
    • Thin film breakage in oil–in–water emulsions, a multidisciplinary study 

      Aarøen, Ola; Riccardi, Enrico; van Erp, Titus Sebastiaan; Sletmoen, Marit (Peer reviewed; Journal article, 2022)
      Coalescence is a critical phenomenon in separation and transport processes. An improved understanding of coalescence can enhance current models predicting emulsion stability and separation. We here report a combined ...
    • Total Synthesis and Semi Synthesis of Steroids: What is the best approach? 

      Berg, Kristoffer Grytdal (Bachelor thesis, 2022)
      Steroider, komplekse molekyler med flere kirale sentre og en størrelsesorden av biokjemiske effekter, har vært i søkelyset for mange kjemikere siden 1940-tallet. På grunn av den økende etterspørselen av steroider for ...
    • Total synthesis of Dothideopyrone E and Dothideopyone F 

      Liwara, David (Master thesis, 2021)
      Dette arbeidet er relatert til syntesen av to naturprodukter, dothideopyrone E og F. Ulike veier har blitt prøvd for å syntetisere disse molekylene. I de første testene ble en Carreira-alkynylering utført for å oppnå gode ...
    • Total Synthesis of Dothideopyrones A-D 

      Noilhan, Victor Hubert Pierre (Master thesis, 2021)
      Dothideopyrone A-D [1-4] har blitt isolert fra dothideomycete LRUB20, en endofytisk sopp som lever i planten Leeea rubra.1 Deres cytotoksiske aktiviteter har blitt testet og ser ut til å være lave, men på grunn av den lave ...
    • Trace element status in patients with type 2 diabetes in Norway: The HUNT3 Survey 

      Simic, Anica; Hansen, Ailin Falkmo; Åsvold, Bjørn Olav; Romundstad, Pål Richard; Midthjell, Kristian; Syversen, Tore; Flaten, Trond Peder (Journal article; Peer reviewed, 2017)
      Several epidemiological studies have indicated that a number of trace elements may play a role in type 2 diabetes (T2D). We investigated the association between prevalent T2D and the concentrations of 25 trace elements in ...