Blar i Fakultet for naturvitenskap (NV) på emneord "Nanoteknologi for materialer, energi og miljø"
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A Finite-Size Study on Samarium-Substituted Bismuth Ferrite: Multiferroic and Lead-Free Piezoelectric Materials
(Master thesis, 2011)Multiferroic materials combine two or more ferroic orders such as ferroelectricity, ferromagnetism and ferroelasticity. They have a great interest for the development of the next generations of digital electronic memory ... -
Alloys as Anode Materials in Magnesium Ion Batteries
(Master thesis, 2012)This thesis is a feasibility study of the possible application of magnesium alloys forfuture magnesium-ion batteries. It investigates dierent alloys and characterizesthem with respect to internal resistance, overpotentials ... -
Biosynthesis and characterization of Ti-doped silica-based Nanostructures formed by the Diatoms Pinnularia sp. and Coscinodiscus wailesii
(Master thesis, 2011)The metabolic insertion of titanium into the biosilica frustules of the pennate diatom Pinnularia sp. and the centric diatom Coscinodiscus wailesii was explored in the present study. A total of five titanium incorporation ... -
Carbon Nanocones as Electrode Material in Lithium Ion Batteries
(Master thesis, 2011)A carbon powder containing carbon nanocones was used as an anode material in lithium ion batteries. The powder was also treated in different ways, chemically, with microwaves, and with heat. The carbon powder was tape ... -
Characterization of Structure and Optical Properties of Diatoms for improved Solar Cell Efficiency
(Master thesis, 2011)Interest in renewable energy resources has increased in recent years, and solar cells are one of the areas that have been subject to intensive research. For solar energy to develop into a competitive alternative to fossil ... -
Colloidal Crystals as Templates for Light Harvesting Structures in Solar Cells
(Master thesis, 2011)Monolayer colloidal crystals are formed using silica- and polystyrene beads and used as templates in nanosphere lithography for creating various hexagonal periodic structures intended for light harvesting in crystalline ... -
Electrical Characterization of Amorphous Silicon Nitride Passivation Layers for Crystalline Silicon Solar Cells
(Master thesis, 2011)High quality surface passivation is important for the reduction of recombination losses in solar cells. In this work, the passivation properties of amorphous hydrogenated silicon nitride for crystalline silicon solar cells ... -
Electron Microscopy characterization of the Interface between a (111)-Si Substrate and GaAs Nanowires grown by Self-Catalysis by MBE
(Master thesis, 2011)The interface between zincblende (ZB) GaAs nanowires (NWs) grown by selfcatalysisin MBE, and a 111-Si substrate was studied. This was done with thepurpose of determining if any defects, stacking fault, twins, different ... -
Multiferroic, Magnetoelectric Nanoparticles: Lanthanum-substituted Bismuth Ferrite
(Master thesis, 2011)In this report, 10 at% lanthanum was introduced to the perovskite structure of bismuth ferrite at the expense of bismuth through a modified Pechini wet chemical method. Green body powders were calcined at several temperatures, ... -
Production of Lead-free Electroceramics: K0.5Na0.5NbO3 substituted with Li & Ta
(Master thesis, 2011)K0:485Na0:485Li0:03Nb0:8Ta0:2O3 powder has been prepared by spray pyrolysis ofaqueous solutions of K/Na/Li nitrates mixed with water soluble Nb and Ta precursors.The as-prepared ceramic powder was calcined at 600 °C to ...