Sökning: "Muhammet S. Toprak"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Muhammet S. Toprak.

  1. 1. Engineered Nanostructures and Thermoelectric Nanomaterials

    Författare :Muhammet S. Toprak; KTH; []
    Nyckelord :Nanoengineering; Thermoelectric materials; Chemical Alloying; Skutterudite;

    Sammanfattning : This thesis deals with novel aspects of Nanomaterials,Nanoscience and Nanotechnology. On the materials side, novelmethods were developed for the fabrication of nano-sizedbuilding blocks, such as nanoparticles, nanorods and nanowireswith defined structures and high homogeneity. Nanoparticleswere consolidated to nanostructured materials. LÄS MER

  3. 2. Quantum Dot Solar Cells: Towards Environmentally Friendly Materials

    Författare :Viktor A. Öberg; Erik Johansson; Muhammet S. Toprak; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum dots; Nano-crystals; Energy conversion; Solar cells; Quantum dot solar cells; Low toxicity; Silver Sulfide; Silver Bismuth Sulfide; Lead Sulfide; Chemistry with specialization in Physical Chemistry; Kemi med inriktning mot fysikalisk kemi;

    Sammanfattning : To decrease the world’s energy dependence on fossil fuels, energy production and specifically electricity production needs to shift to more sustainable alternatives. One such alternative is solar cells as they directly convert energy emitted from the sun into electricity. LÄS MER

  4. 3. Growth, processing and characterization of group IV materials for thermoelectric applications

    Författare :Mohammad Noroozi; Muhammet .S Toprak; Henry .H Radamson; Raşit Turan; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Thermoelectric; SiGe; GeSn Si ; Chemical vapor deposition; Nanowires; Fysik; Physics;

    Sammanfattning : Discover of new energy sources and solutions are one of the important global issues nowadays, which has a big impact on economy as well as environment. One of the methods to help to mitigate this issue is to recover wasted heat, which is produced in large quantities by the industry, through vehicle exhausts and in many other situations where we consume energy. LÄS MER

  5. 4. Tungsten-Based Nanocomposites by Chemical Methods

    Författare :Sverker Wahlberg; Muhammet S. Toprak; Håkan Engqvist; FNM Funktionella material KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Tungsten based-materials find use in many different fields of engineering, particularly in applications where good temperature and/or erosion resistance is important. Nanostructuring of tungsten composites is expected to dramatically improve the materials’ properties and enhancing the performance in present applications but also enabling totally new possibilities. LÄS MER

  7. 5. Nanostructured Bulk Thermoelectrics : Scalable Fabrication Routes, Processing and Evaluation

    Författare :Mohsen Yakhshi Tafti; Muhammet S. Toprak; Gao Min; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thermoelectric; Iron antimonide FeSb2 Skutterudite; Copper Selenide Cu2Se ; Spark Plasma Sintering SPS ; nanomaterial; Teknisk materialvetenskap; Materials Science and Engineering; Energy Technology; Energiteknik;

    Sammanfattning : Current fossil fuel based energy sources have a huge shortcoming when one discusses their efficiency. The conversion efficiency of fossil fuel-based technologies is less than 40% in best cases. LÄS MER