Sökning: "Funktionella"

Visar resultat 21 - 25 av 442 avhandlingar innehållade ordet Funktionella.

1. 21. Nano-EngineeredThermoelectric Materials for Waste Heat Recovery

   Författare :Mohsin Saleemi; Muhammet Toprak; Mari-Ann Einarsrud; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Energy crisis and thermal management related issues have been highlighted in the modern century due to escalating demands for energy consumption and global warming from fossil fuels. Sustainable and alternative energy sources are an ever growing global concern. LÄS MER

3. 22. Green Chemical Synthesis of II-VI Semiconductor Quantum Dots

   Författare :Robina Shahid; Mamoun Muhammed; Gunnar Westin; KTH; []
   Nyckelord :Semiconductor; Quantum Dots; Microwave; Ionic Liquids; Green Chemical Syntheis; Quantum Confinement; Optical Properties;

   Sammanfattning : Nanotechnology is the science and technology of manipulating materials at atomic and molecular scale with properties different from bulk. Semiconductor QDs are important class of nanomaterials with unique physical and chemical properties owing to the quantum confinement effect. LÄS MER

4. 23. Fabrication and Photoelectrochemical Applications of II-VI Semiconductor Nanomaterials

   Författare :Abhilash Sugunan; Muhammet Toprak; Mamoun Muhammed; Gerrit Boschloo; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ZnO; nanowire arrays; photocatalysis; CdTe; CdSe; CdS; nanotetrapods; nanotetrahedrons; photoconduction; nano-gap electrodes; Type-II QDs; P3HT nanofibers; microwave synthesis.;

   Sammanfattning : In this work we investigated fabrication of semiconductor nanomaterials and evaluated their potential for photo-chemical and photovoltaic applications. We investigated different II-VI semiconductor nanomaterial systems; (i) ZnO oriented nanowire arrays non-epitaxially grown from a substrate; and (ii) colloidal CdE (E=Te,Se,S) quantum structures synthesized by solution-based thermal decomposition of organo-metallic precursors. LÄS MER

5. 24. Photochemical and Photoelectric Applications of II-VI Semiconductor Nanomaterials

   Författare :Abhilash Sugunan; Mamoun Muhammed; Lars Kloo; KTH; []
   Nyckelord :ZnO; Nanowire arrays; Photocatalysis; Nanofibers; CdTe; Nanotetrapods; Ostwalds ripening; Photoconduction; Nano-gap electrodes;

   Sammanfattning : In this work we investigated fabrication of semiconductor nanomaterials and evaluated their potential for photo-chemical and photovoltaic applications. We investigated two different II-VI semiconductor nanomaterial systems; (i) ZnO oriented nanowire arrays non-epitaxially grown from a substrate; and (ii) colloidal CdTe nanotetrapods synthesized by solution-based thermal decomposition of organo-metallic precursors. LÄS MER

7. 25. Nanostructured Tungsten Materials by Chemical Methods

   Författare :Sverker Wahlberg; Mamoun Muhammed; Håkan Engqvist; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Tungsten based-materials are used in many different technical fields, particularly in applications requiring good temperature and/or erosion resistance. Nanostructuring of tungsten alloys and composites has the potential to dramatically improve the materials’ properties, enhancing the performance in present applications or enabling totally new possibilities. LÄS MER