Sökning: "sol-gel synthesis"

Visar resultat 11 - 15 av 25 avhandlingar innehållade orden sol-gel synthesis.

1. 11. Engineering nanomaterials with enhanced functionality

   Författare :Shanghua Li; Mamoun Muhammed; Saad Elraghy; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PMMA-ZnO; nanocomposite; hybrid material; in situ sol-gel polymerization; quantum dots; UV-shielding; Nanostructured surface; Pool boiling; Heat transfer coefficient; Bubble nucleation; Enhanced boiling; dendritic branch; Electrodeposition; Nanoengineering; Materials chemistry; Materialkemi;

   Sammanfattning : This thesis deals with the engineering of novel nanomaterials, particularly nanocomposites and nanostructured surfaces with enhanced functionalities. The study includes two parts; in the first part, an in situ sol-gel polymerization approach is used for the synthesis of polymer-inorganic hybrid material and its exceptional transparent UV-shielding effect has been investigated. LÄS MER

3. 12. Synthesis of nanostructured and hierarchical materials for bio-applications

   Författare :Fei Ye; Mamoun Muhammed; Andreas Fisher; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fe3O4; mSiO2; core-shell; MRI; multifunctional; PNIPAAm; LCST; gold; nanorod; nitric acid; AR; MDDC; biocompatibility; immunomodulation; Materials chemistry; Materialkemi;

   Sammanfattning : In recent years, nanostructured materials incorporated with inorganic particles and polymers have attracted attention for simultaneous multifunctional biomedical applications. This thesis summarized three works, which are preparation of mesoporous silica coated superparamagnetic iron oxide (Fe3O4@mSiO2) nanoparticles (NPs) as magnetic resonance imaging T2 contrast agents, polymer grafted Fe3O4@mSiO2 NPs response to temperature change, synthesis and biocompatibility evaluation of high aspect ratio (AR) gold nanorods. LÄS MER

4. 13. Mesoporous Building Blocks : Synthesis and Characterization of Mesoporous Silica Particles and Films

   Författare :Emma M. Björk; Magnus Odén; Fredik Söderlind; José Córdoba; Mika Lindén; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : Catalyst supports, drug delivery systems, hosts for nanoparticles, and solar cells are just some examples of the wide range of exciting applications for mesoporous silica. In order to optimize the performance of a specific application, controlling the material’s morphology and pore size is crucial. LÄS MER

5. 14. Colloidal Synthesis and Characterisation of (a) Na0.5K0.5NbO3 Thin Films; and (b) Functionalised Gd2O3 Nanocrystals

   Författare :Fredrik Söderlind; Per-Olov Käll; Lars Ojamäe; Linköpings universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : (a) Thin films of the perovskite structured Na0.5K0.5NbO3 (NKN) have been synthesised with several different sol-gel methods. Only one method gave pure NKN phase while the other methods gave extra peaks in the x-ray diffraction patterns, indicating that other, unidentified, phases were present. LÄS MER

7. 15. Synthesis–Structure–Property Relationships in Li- and Mn-rich Layered Oxides

   Författare :Ashok S. Menon; William Brant; Montserrat Casas-Cabanas; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Li- and Mn-rich layered oxides; Li-ion battery cathode materials; synthesis–property relationships; stacking faults; anionic redox materials;

   Sammanfattning : The commercialisation of Li-ion batteries over the last decade has provided additional impetus for the improvement of existing energy storage technologies. Towards this, a major portion of the global efforts includes exploratory research aimed at the development of new material chemistries. LÄS MER