Browsing Fakultet for naturvitenskap (NV) by Title
Now showing items 10845-10864 of 12667
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Supported Iridium-Ruthenium Mixed Oxide Catalysts for Oxygen Evolution: Synthesis of Mixed Oxides by the Microwave Polyol Method. Composition Dependency of the Catalytic Activities of Mixed Oxides for the OER in PEM Water Electrolysis
(Master thesis, 2013)In this work the microwave polyol synthesis method have been shown as an advantageous method for producing ATO supported IrO2, RuO2 and iridium-ruthenium mixed oxides, allowing for faster synthesis than the normal polyol ... -
Supported Manganese Oxide Catalysts for NO Oxidation in Nitric Acid Production
(Master thesis, 2018)Nitric acid is an important bulk chemical in the petrochemical industry, and the main product is ammonium nitrate for fertilizers. It is produced by the Ostwald process, where one of three chemical steps is the oxidation ... -
Supporting Fall Prevention for the Elderly by Using Mobile and Ubiquitous Computing
(Master thesis, 2013)Approximately one third of the elderly (over age 65) fall each year. Falls are the one of the main reasons of injury-related cases and the leading cause of accidental deaths among the elderly. The overwhelming majority of ... -
Suppression of multiple Scattering and imaging of nonlinear Scattering in Ultrasound imaging
(Master thesis, 2013)The work presented is based on an imaging method using dual-frequency band pulses for imaging of nonlinear scatters from stiff particles like micro calcifications. The pulse complex consist of a high-frequency imaging pulse ... -
Surface Acoustic Wave Acoustophoresis for Microfluidic Based Micron and Submicron Particle Separation
(Master thesis, 2016)Microvesicles secreted from our cells referred to as exosomes contain vital information on our health status and are believed to revolutionize early diagnosis. Therefore, separation of such particles is a growing field ... -
Surface and bulk properties of chromium oxide: Implications for reduction by methane
(Journal article; Peer reviewed, 2015)A computational method for Cr2O3 and Cr3C2 has been established based on a systematic investigation of functionals, basis sets and corrections for dispersion, self-interaction and relativistic effects. The suggested method ... -
Surface Characterization of Titanium Dioxide Thin Film
(Master thesis, 2021)One of the third-generation solar cell concepts is the intermediate band solar cells (IBSCs), which are based on a new type of semiconductor materials, that has an intermediate band (IB) within the forbidden band gap. IBSCs ... -
Surface Diffusion of Oxygen Transport Membrane Materials Studied by Grain-Boundary Grooving
(Journal article; Peer reviewed, 2016)Mass transport mechanism responsible for grain-boundary grooving during thermal annealing of polished ceramics of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) and La2NiO4+δ (LN) was revealed by atomic force microscopy. Surface diffusion ... -
Surface interactions relevant to cancer treatment - A study of fluorouracil reactions on diamond and graphite surfaces
(Master thesis, 2015)Fluorouracil (5-FU) is a chemotherapy drug with molecular formula C4H3FN2O2. The interaction between fluorouracil and nanocrystalline diamond, and between fluorouracil and graphite was studied with X-ray photoelectron ... -
Surface Modified γ-Alumina Supports For Cobalt Fischer-Tropsch Catalysts
(Master thesis, 2015)Fischer-Tropsch synthesis over cobalt based catalysts is an important route for the conversion of syngas, derived from natural gas, to liquid fuels. Fischer-Tropsch performance of cobalt catalysts depends on a number of ... -
Surface passivation properties of HfO2 thin film on n-Type crystalline Si
(Journal article, 2017)Atomic layer deposited hafnium oxide is shown to provide good surface passivation of low resistivity, n-type crystalline Si wafers after a low temperature anneal. The surface passivation is related to a fixed negative ... -
Surface phase diagrams of La-based perovskites towards the O-rich limit from first principles
(Journal article; Peer reviewed, 2019)The exposed termination of transition-metal oxide surfaces plays a major role in determining the catalyst performance in redox reactions. In this contribution, the surface phase diagrams of LaMO3(001) (M = Sc–Fe) and ... -
Surface pretreatments and filiform corrosion mechanism of model recycled aluminium alloys
(Doctoral theses at NTNU;2024:224, Doctoral thesis, 2024)Filiform corrosion (FFC) is a type of localized corrosion process that affects metals such as aluminium, magnesium and steel under certain environmental circumstances. FFC often occurs in environments combining marine and ... -
Surface processing and analysis of crystalline silicon solar cell materials
(Doctoral theses at NTNU;2023:251, Doctoral thesis, 2023) -
Surface reactivity and cation non-stoichiometry in BaZr1-xYxO3-δ (x=0-0.2) exposed to CO2 at elevated temperature
(Journal article; Peer reviewed, 2019)The reactivity of BaZr1−xYxO3−δ (x = 0–0.2) ceramics under 1 atm CO2 at 650 °C for up to 1000 h was investigated in order to elucidate possible degradation processes occurring when the material is applied as a proton-conducting ... -
Surface science studies of Cobalt and Rhodium single crystal surfaces
(Dr. ingeniøravhandling, 0809-103X; 2001:82, Doctoral thesis, 2001)The main topic of this thesis is the investigation of small molecules adsorbed on the transition metals cobalt and rhodium surfaces by means of predominantly high-resolution core level photoemission and near edge x-ray ... -
Surface science studies of TiO2 single crystal systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:239, Doctoral thesis, 2009)Titanium dioxide is a material finding applications in variety of areas, including catalysis, photocatalysis, photovoltaics, energy storage, gas sensors and biocompatible materials. As a consequence, this material has been ... -
Surface Studies of as-cut Silicon for solar cells
(Master thesis, 2009) -
Surface studies of LaAlO3 substrates for TiO2 thin film deposition
(Master thesis, 2020)Inanattempttoincreasetheefficiencyofsolarcells, the one proposed solution is intermediate band solar cells (IBSCs). IBSCs are based on so-called intermediate band materials, that have an intermediate band within the bandgap. ... -
Surface studies of palladium based membranes and model systems
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:64, Doctoral thesis, 2009)The work of this thesis can be divided in to parts, one is based on the Pd/Ag alloy membranes and the other is about the model systems. It is well known that, Pd is a potential candidate membrane material, due to both its ...