Structural and electronic properties of carbon nanotube tapers Metadata

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Title

  • Main Title Structural and electronic properties of carbon nanotube tapers

Creator

  • Author: Meunier, Vincent
    Creator Type: Personal
    Creator Info: North Carolina State University
  • Author: Buongiorno Nardelli, Marco
    Creator Type: Personal
    Creator Info: University of North Texas; North Carolina State University
  • Author: Roland, Christopher
    Creator Type: Personal
    Creator Info: North Carolina State University
  • Author: Bernholc, Jerry
    Creator Type: Personal
    Creator Info: North Carolina State University

Publisher

  • Name: American Physical Society
    Place of Publication: [College Park, Maryland]

Date

  • Creation: 2001-10-29

Language

  • English

Description

  • Content Description: Article on structural and electronic properties of carbon nanotube tapers, a set of nanostructures comprised of straight tubular sections with decreasing diameters, joined to each other via conical funnels and terminated with a hemispherical cap.
  • Physical Description: 7 p.

Subject

  • Keyword: carbon nanotubes
  • Keyword: scanning tunneling microscopy
  • Keyword: nanotechnology

Source

  • Journal: Physical Review B, 2000, College Park: American Physical Society

Citation

  • Publication Title: Physical Review B
  • Volume: 64
  • Pages: 7
  • Peer Reviewed: True

Collection

  • Name: UNT Scholarly Works
    Code: UNTSW

Institution

  • Name: UNT College of Arts and Sciences
    Code: UNTCAS

Rights

  • Rights Access: public

Resource Type

  • Article

Format

  • Text

Identifier

  • DOI: 10.1103/PhysRevB.64.195419
  • Archival Resource Key: ark:/67531/metadc234914

Degree

  • Academic Department: Physics

Note

  • Display Note: Copyright 2001 American Physical Society. The following article appeared in Physical Review B, 64, http://link.aps.org/doi/10.1103/PhysRevB.64.195419
  • Display Note: Abstract: Carbon nanotube tapers are a set of nanostructures comprised of straight tubular sections with decreasing diameters, joined to each other via conical funnels and terminated with a hemispherical cap. The funnels are formed with the help of topological defects, which minimally include at least one pentagon-heptagon pair. The structural, electronic, and transport properties of tapers are analyzed using realistic tight-binding models. Specifically, it is shown that straight nanotube tapers are monochiral objects. Among a variety of possible taper structures, kinetics of the growth process suggests that the most prevalent tapers will have either zigzag or armchair structures. Their scanning tunneling microscopy (STM) images have been simulated for identification purposes. The STM images of tapers are dominated by a protruding pentagon inherent in the taper structure, which unfortunately does not allow for an easy identification of the chirality of the underlying nanotubes. Turning to transport properties, it is shown that zigzag-based tapers will likely be poor conductors, because of gaps induced by the semiconducting segments. Armchair-based tapers, on the other hand, are characterized by a finite conductance at low bias voltages and make attractive prototypes for nanoscale probes and devices.
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