Sökning: "carbon nanotube"

Visar resultat 11 - 15 av 16 uppsatser innehållade orden carbon nanotube.

  1. 11. Carbon Nanotubes : A Theoretical study of Young's modulus

    Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Tore Fredriksson; [2014]
    Nyckelord :Carbon nanotube; Density Functional Theory. DFT; Augmented Plane Wave Method; APW; ELK;

    Sammanfattning : Carbon nanotubes have extraordinary mechanical, electrical, thermal andoptical properties. They are harder than diamond yet exible, have betterelectrical conductor than copper, but can also be a semiconductor or evenan insulator. These ranges of properties of course make carbon nanotubeshighly interesting for many applications. LÄS MER

  3. 12. Mechanical properties of carbon nanotubes grown by pyrolysis of ferrocene

    Master-uppsats, Fakulteten för teknik- och naturvetenskap

    Författare :Sofie Yngman; [2012]
    Nyckelord :Carbon Nanotubes; Mechanical properties; Scanning electron microscopy; Atomic force microscopy; Youngs modulus; transmission electron microscopy;

    Sammanfattning : Carbon nanotubes (CNTs) have drawn a lot of attention during the last decades due to its promising mechanical and electrical properties. Extensive research regarding the mechanical properties of CNTs has been carried out during the last decades. LÄS MER

  4. 13. Curvature-Induced Energy Band Tilting in Finite-Length Carbon Nanotubes

    Master-uppsats, Institutionen för fysik

    Författare :Anton Vikström; [2011]
    Nyckelord :carbon nanotubes; graphene; Dirac cone; condensed matter; velocity asymmetry; tilting; kolnanorör; grafen; Dirac-kon; kondenserade materien; hastighetsasymmetri; lutning;

    Sammanfattning : The near-Fermi-energy energy band structure of carbon nanotubes is given by cross-sections of the graphene Dirac cones near the K and K' points. Using second-order perturbation theory and a nearest-neighbor approximated tight-binding model, curvature-induced corrections to the graphene-based effective model are derived. LÄS MER

  5. 14. To automatically estimate the surface area coverage of carbon nanotubes on thin film transistors with image analysis : Bachelor’s degree project report

    Kandidat-uppsats, Institutionen för teknikvetenskaper

    Författare :Martin Noring; [2011]
    Nyckelord :image analysis; thin film transistor; TFT; carbon nanotube; CNT;

    Sammanfattning : This report discuss the developement of a MATLAB-based tool for the analysis ofsurface area coverage of carbon nanotube networks from atomic force microscopyimages. The tool was compared with a manual method and the conclusion was that ithas, at least, the same accuracy as the manual mehtod, and it needs much less time forthe analysis. LÄS MER

  7. 15. Fabrication of Carbon Nanotube Doped Thin Films for Laser Applications.

    Kandidat-uppsats, KTH/Fysik

    Författare :Robert W Hurra; [2011]
    Nyckelord :;

    Sammanfattning : Mode-locked lasers are used for a vast amount of applications, e.g. corneal surgery[1] and optical data storage[2] . The currently established technique for mode-locking with a semiconductor saturable absorber mirror is expensive and in- volves a fairly advanced production technique[3] . LÄS MER