Search for dissertations about: "VLS-growth"

Showing result 1 - 5 of 6 swedish dissertations containing the word VLS-growth.

  2. 1. Preparation and characterisation of refractory whiskers and selected alumina composites

    Author : Mats Carlsson; Mats Johnsson; Tor Grande; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; VLS-growth; Characterisation; Whiskers; Sintering; Ceramic composites; Inorganic chemistry; Oorganisk kemi;

    Abstract : A whisker is a common name of single crystalline inorganic fibre of small dimensions, typically 0.5-1 μm in diameter and 20-50 μm in length. Whiskers are mainly used as reinforcement of ceramics. This work describes the synthesis and characterisation of new whisker types. READ MORE

  4. 2. Carbothermal synthesis of transition metal carbide and carbonitride whiskers via a Vapour-Liquid-Solid (VLS) growth mechanism

    Author : Niklas Ahlén; Jan Otto Carlsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; oorganisk kemi; Inorganic Chemistry;

    Abstract : A route for the synthesis of TiC, TiCyN1-y, TaxTi1-xC and TaxTi1-xCyN1-y whiskers via a carbothermal Vapour-Liquid-Solid (VLS) growth mechanism, yielding 70-90 vol.% whiskers, has been established. The whiskers were uniform in diameter (0.3-0. READ MORE

  5. 3. Thermodynamic modelling of composition and crystal structure of ternary nanowires

    Author : Egor Leshchenko; NanoLund: Centre for Nanoscience; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : An analytic expression for the composition of a ternary solid material nucleating from a quaternary liquid melt has been derived. This theory has been applied to Au-catalyzed and self-catalyzed, nucleation limited VLS growth of ternary III-V nanowires. READ MORE

  6. 4. Epitaxial Growth, Processing and Characterization of Semiconductor Nanostructures

    Author : Magnus Borgström; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum transport; resonant tunneling diodes; relativity; quantum mechanics; statistical physics; thermodynamics; Matematisk och allmän teoretisk fysik; klassisk mekanik; kvantmekanik; relativitet; gravitation; statistisk fysik; termodynamik; classical mechanics; Mathematical and general theoretical physics; whiskers; ultra high vacuum chemical vapor deposition; RTD; self assembled quantum dots; semiconducting III-V materials; nanowires; metalorganic vapor phase epitaxy; MOVPE; nanostructures; AFM; Atomic force microscopy; InAs; Fysicumarkivet A:2003:Borgström;

    Abstract : This thesis deals with the growth, processing and characterization of nano-sized structures, eg., self-assembled quantum dots and nano-wires. READ MORE

  7. 5. InP/GaInP Nanowires for Tandem Junction Solar Cells : Growth, Processing, and Characterization

    Author : Xulu Zeng; Fasta tillståndets fysik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanowires; GaInP; InP; tandem; tunnel diode; solar cell;

    Abstract : Semiconductor nanowire solar cells have achieved comparable efficiency to their planar counterparts with substantial reduction of material consumption. Tandem geometry is a path towards even higher efficiency. However, extensive studies are needed to reach this goal. READ MORE