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Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts.
Umeå University, Faculty of Science and Technology, Physics.
Umeå University, Faculty of Science and Technology, Physics.
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2000 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 320, no 3-4, 365-372 p.Article in journal (Refereed) Published
Abstract [en]

SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the smallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and short time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats.

Place, publisher, year, edition, pages
Elsevier B.V. , 2000. Vol. 320, no 3-4, 365-372 p.
Keyword [en]
Single-walled carbon nanotubes, carbon nanotubes, SWCNT, synthesis, catalyst, arc synthesis, Raman spectroscopy, SEM, acid treatment, purification, electrical resistivity, hopping conduction, 2D, two-dimensional, 3D, three-dimensional, bundles
National Category
Condensed Matter Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:umu:diva-22515DOI: 10.1016/S0009-2614(00)00235-9OAI: oai:DiVA.org:umu-22515DiVA: diva2:216790
Available from: 2009-05-12 Created: 2009-05-12 Last updated: 2017-12-13

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