Sökning: "shell core particles"

Visar resultat 21 - 25 av 46 avhandlingar innehållade orden shell core particles.

  1. 21. Synthesis of carbon-covered iron nanoparticles by photolysis of ferrocene

    Författare :Karine Elihn; Knut Deppert; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; iron; carbon; nanoparticle; ferrocene; laser-assisted CVD; particle size; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : One important driving force in nanotechnology today is the change which can be made in the properties of a material when the dimensions of its individual building blocks are decreased below approximately 100 nm. Such small building blocks, typically nanoparticles, may induce new and unique properties compared to those of the corresponding bulk material. LÄS MER

  3. 22. Optical Properties of Nanoparticles in Composite Materials

    Författare :Lin Dong; Sergei Popov; Ari Friberg; Toralf Scharf; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Nanoparticles are synthetic structures with dimension from 1 to 100 nanometers and are various in types. Some favorable properties peculiar to the nanoparticles (generally owing to size effects) make them prevailing and beneficial for applications in different scientific and engineering fields. LÄS MER

  4. 23. Synthesis of tailored nanoparticles for palladium-based oxidation catalysts

    Författare :Yanyue Feng; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supported catalysts; CO oxidation; morphology and surface properties; in situ spectroscopy; Pd and Au@Pd nanoparticles;

    Sammanfattning : The immense changes of physical and chemical properties of materials caused by the transition from microscale to nanoscale have been attracting scientific attention for decades. Rapid development of modern techniques triggers the attention on the multicomponent nanoparticle catalysts with enhanced catalytic activities. LÄS MER

  5. 24. Thermally Expandable Microspheres Prepared via Suspension Polymerization - Synthesis, Characterization, and Application

    Författare :Magnus Jonsson; Eva Malmström Jonsson; Søren Hvilsted; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thermally expandable microspheres; Polymer chemistry; Polymerkemi;

    Sammanfattning : Thermally expandable microspheres are polymeric core/shell particles in which a volatile hydrocarbon is encapsulated by a thermoplastic shell. When these microspheres are heated, they expand and increase their volume dramatically. LÄS MER

  7. 25. Surface Modifications and Applications of Aqueous Silica Sols

    Författare :Peter Greenwood; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; applications; Surface modification; aqueous; silica sol; silane; colloidal silica; titania;

    Sammanfattning : Methods of modifying the surface of the particles of colloidal silica were developed and the effects of surface modification on the properties of colloidal silica were studied.Gamma-glycidoxypropyltrimethoxysilane (GPTMS) readily reacts with water to yield a hydrolysed silane that reacts readily with the silica surface. LÄS MER