Chirality effect of single-wall carbon nanotubes on field emission

Shi-Dong Liang, K.S.; Xu, N.S.
August 2003
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1213
Academic Journal
The chirality effect of an opened-end single-wall carbon nanotube on field emission is studied by using the tunneling theory with the tight-binding approximation. The characteristic of the emission-current line density versus field is found to be dependence on the chirality of nanotubes. A metallic tube has a line density higher than that of a semiconducting one. Also, for semiconducting tubes, a tube of larger chiral angle has a line density higher than that of smaller chiral angle; a zigzag semiconducting tube has a smallest line density among the others. Further, the Fowler–Nordheim plots may have a nonlinear behavior in high current region. Finally, at temperature T<1000 K, the emission current is almost independent of temperature. Our results are explained by the energy band structure of nanotubes. © 2003 American Institute of Physics.


Related Articles

  • Chirality dependent G-band Raman intensity of an individual single wall carbon nanotube. Saito, R.; Jorio, A.; Hafner, J. H.; Lieber, C. M.; Hunter, M.; McClure, T.; Dresselhaus, G.; Dresselhaus, M. S. // AIP Conference Proceedings;2001, Vol. 590 Issue 1, p185 

    The chirality-dependent G-band Raman intensity of an individual single wall carbon nanotube is presented both by a non-resonant theory for the Raman tensor and by confocal micro-Raman measurements. Theory predicts six or three intense Raman modes, respectively, for chiral or achiral nanotubes...

  • Theoretical Investigation of Small Diameter Single-Wall Carbon Nanotubes. Kürti, Jenő; Zólyomi, Viktor // AIP Conference Proceedings;2003, Vol. 685 Issue 1, p456 

    Density functional theory calculations were carried out to obtain the geometries, electronic band structures and the radial breathing mode frequencies of 23 single wall carbon nanotubes (armchair, zigzag as well as chiral tubes) within the diameter range of 0.3–0.8 nm. These parameters...

  • Nonequilibrium electron charging in carbon-nanotube-based molecular bridges. Deretzis, I.; La Magna, A. // Applied Physics Letters;10/15/2007, Vol. 91 Issue 16, p163111 

    We evidence the importance of electron charging under nonequilibrium conditions for carbon-nanotube-based molecular bridges, using a self-consistent Green’s function method with an extended Hückel Hamiltonian and a three-dimensional Poisson solver. Our analysis demonstrates that such...

  • In situ growth rate control of carbon nanotubes by optical imaging method. Gunjishima, Itaru; Inoue, Takashi; Okamoto, Atsuto // Applied Physics Letters;11/5/2007, Vol. 91 Issue 19, p193102 

    Feedback control of the growth rate of carbon nanotubes (CNTs) was performed. By measuring the CNTs thickness using an optical microscope and an image processor, and instantaneous calculation of growth rate, continuous data of CNT thickness/growth rate versus growth time curves were obtained....

  • Exact Geometric Relationships, Symmetry Breaking and Structural Stability for Single-Walled Carbon Nanotubes. Tong Zhang; Ze Shuai Yuan; Li Hao Tan // Nano-Micro Letters;2011, Vol. 3 Issue 4, p228 

    We pioneered a study about how the geometric relationship of single-walled carbon nanotubes (SWCNT) is influenced by curvature factor and non-planar geometry factor in cylindrical coordinate system based on the assumption of complete symmetry. The bond length and angle of every carbon-carbon...

  • Measurements of near-ultimate strength for multiwalled carbon nanotubes and irradiation-induced crosslinking improvements. Bei Peng; Locascio, Mark; Zapol, Peter; Shuyou Li; Mielke, Steven L.; Schatz, George C.; Espinosa, Horacio D. // Nature Nanotechnology;Oct2008, Vol. 3 Issue 10, p626 

    The excellent mechanical properties of carbon nanotubes are being exploited in a growing number of applications from ballistic armour to nanoelectronics. However, measurements of these properties have not achieved the values predicted by theory due to a combination of artifacts introduced during...

  • Photoluminescence from single-walled carbon nanotubes: a comparison between suspended and micelle-encapsulated nanotubes. Lefebvre, J.; Fraser, J. M.; Homma, Y.; Finnie, P. // Applied Physics A: Materials Science & Processing;2004, Vol. 78 Issue 8, p1107 

    Single-walled carbon nanotubes (SWNTs) are luminescent. Up to now, two preparation methods, both of which isolate individual SWNTs, have enabled the detection of nanotube bandgap photoluminescence (PL): encapsulation of individual SWNTs into surfactant micelles and direct growth of individual...

  • Ultra-fast optical spectroscopy of micelle-suspended single-walled carbon nanotubes. Kono, J.; Ostojic, G. N.; Zaric, S.; Strano, M. S.; Moore, V. C.; Shaver, J.; Hauge, R. H.; Smalley, R. E. // Applied Physics A: Materials Science & Processing;2004, Vol. 78 Issue 8, p1093 

    We present results of wavelength-dependent ultra-fast pump�probe experiments on micelle-suspended single-walled carbon nanotubes. The linear absorption and photoluminescence spectra of the samples show a number of chirality-dependent peaks and, consequently, the pump�probe results...

  • Crystal-Geometry Description of the Morphological Features and Determination of the Chiral Angle of Carbon Nanotubes. Grigor'eva, L.D. // Doklady Physics;May2004, Vol. 49 Issue 5, p261 

    Describes the crystal-geometry of the morphological features of the chiral angle of carbon nanotubes. Electron diffraction patterns; Crystallographic directions of chiral characteristics; Position of the nodes of the reciprocal lattice.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics