Search for dissertations about: "carbon nanotubes"

Showing result 1 - 5 of 155 swedish dissertations containing the words carbon nanotubes.

  1. 1. Chemistry of Carbon Nanostructures Functionalization of Carbon Nanotubes and Synthesis of Organometallic Fullerene Derivatives

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Claes-Henrik Andersson; Helena Grennberg; Nazario Martín León; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbon nanotubes; Fullerenes; Purification; Functionalization; Organometallic complexes; Kemi med inriktning mot organisk kemi; Chemistry with specialization in Organic Chemistry;

    Abstract : This thesis is based on two main parts. The first part concerns purification and functionalization of carbon nanotubes (papers I-III), and the second part is related to the synthesis of organometallic fullerene derivatives (papers IV-VII):Two oxidative methods involving aqueous nitric acid were compared with respect to their capability to introduce carboxylic groups into single walled carbon nanotubes, and several literature methods for esterification and amidation of these groups have been evaluated with focus on efficiency and reproducibility in forming covalently functionalized products soluble in organic media. READ MORE

  2. 2. Cellulose–Assisted Dispersion of Carbon Nanotubes : From Colloids to Composites

    University dissertation from KTH Royal Institute of Technology

    Author : Alireza Hajian; Lars Berglund; Milo Shaffer; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nanocelluloses; Carbon nanotubes; Composites; Colloids; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Abstract : It is a challenge to disperse nanoparticles to obtain a nanostructured composite. This thesis aims at providing a new route to fabricate carbon nanotube (CNT) composites and suggests mechanisms for nanocellulose–CNT interactions. This route is based on unmodified CNT dispersed in water with the help of nanocellulose. READ MORE

  3. 3. Towards Controlled Growth and Applications of Carbon Nanotubes

    University dissertation from KTH Royal Institute of Technology

    Author : Raluca Elena Morjan; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acetylene; carbon nanotubes; carbon feedstock; chemical vapor deposition; fullerenes; dc-glow discharge plasma; growth mechanism; metal catalyst;

    Abstract : This thesis deals with growth, characterization and application of carbon nanotubes. The methods involved in the production of carbon nanotubes are thermal chemical vapor deposition (T-CVD) and plasma enhanced chemical vapor deposition (PE-CVD). READ MORE

  4. 4. Dispersing Carbon Nanotubes: Towards Molecular Understanding

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Ricardo M. Ferreira Fernandes; Istvan Furo; Eduardo Marques; Philippe Poulin; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; carbon nanotubes; dispersion; surfactants; polymers; adsorption; liquid crystals; nuclear magnetic resonance; self-diffusion; Kemi; Chemistry;

    Abstract : Carbon nanotubes (CNTs) exhibit unique and fascinating intrinsic electrical, optical, thermal or mechanical properties that lead to a plethora of potential applications in composite materials, electronics, energy storage, medicine, among others. However, the manipulation of nanotubes is not trivial and there are significant difficulties to overcome before achieving their full potential in applications. READ MORE

  5. 5. Low temperature growth of carbon nanotubes

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Staffan Dittmer; [2006]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acetylene; iron catalyst; low temperature growth; electric field alignment; chemical vapor deposition; tungsten electrodes; ethylene; on-clip growth; localised resistive heating; carbon nanotubes;

    Abstract : .... READ MORE