TITLE

Upper bound for the conductivity of nanotube networks

AUTHOR(S)
Pereira, L. F. C.; Rocha, C. G.; Latgé, A.; Coleman, J. N.; Ferreira, M. S.
PUB. DATE
September 2009
SOURCE
Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p123106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Films composed of nanotube networks have their conductivities regulated by the junction resistances formed between tubes. Conductivity values are enhanced by lower junction resistances but should reach a maximum that is limited by the network morphology. By considering ideal ballistic-like contacts between nanotubes, we use the Kubo formalism to calculate the upper bound for the conductivity of such films and show how it depends on the nanotube concentration as well as on their aspect ratio. Highest measured conductivities reported so far are approaching this limiting value, suggesting that further progress lies with metallic nanowires rather than carbon nanotubes.
ACCESSION #
44374778

 

Related Articles

  • Synthesis of quantum-confined CdS nanotubes. A. Mahapatra // Journal of Nanoparticle Research;Feb2009, Vol. 11 Issue 2, p467 

    Abstract  CdS nanotubes with wall thickness comparable to excitonic diameter of the bulk material are synthesized by a chemical route. A change in experimental conditions result in formation of nanowires, and well-separated nanoparticles. The diameter and wall thickness of nanotubes...

  • An ultrafast carbon nanotube terahertz polarisation modulator. Docherty, Callum J.; Stranks, Samuel D.; Habisreutinger, Severin N.; Joyce, Hannah J.; Herz, Laura M.; Nicholas, Robin J.; Johnston, Michael B. // Journal of Applied Physics;2014, Vol. 115 Issue 20, p203108-1 

    We demonstrate ultrafast modulation of terahertz radiation by unaligned optically pumped single-walled carbon nanotubes. Photoexcitation by an ultrafast optical pump pulse induces transient terahertz absorption in nanowires aligned parallel to the optical pump. By controlling the polarisation of...

  • Dynamic range of nanotube- and nanowire-based electromechanical systems. Postma, H. W. Ch.; Kozinsky, I.; Husain, A.; Roukes, M. L. // Applied Physics Letters;5/30/2005, Vol. 86 Issue 22, p223105 

    Nanomechanical resonators with high aspect ratio, such as nanotubes and nanowires are of interest due to their expected high sensitivity. However, a strongly nonlinear response combined with a high thermomechanical noise level limits the useful linear dynamic range of this type of device. We...

  • Tuning thermal transport in nanotubes with topological defects. Jian Wang; Liang Li; Jian-Sheng Wang // Applied Physics Letters;8/29/2011, Vol. 99 Issue 9, p091905 

    Using the atomistic nonequilibrium Green's function, we find that thermal conductance of carbon nanotubes with presence of topological lattice imperfects is remarkably reduced, due to the strong Rayleigh scattering of high-frequency phonons. Phonon transmission across multiple defects behaves as...

  • Large-area blown bubble films of aligned nanowires and carbon nanotubes. Guihua Yu; Cao, Anyuan; Lieber, Charles M. // Nature Nanotechnology;Jun2007, Vol. 2 Issue 6, p372 

    Many of the applications proposed for nanowires and carbon nanotubes require these components to be organized over large areas with controlled orientation and density. Although progress has been made with directed assembly and Langmuir–Blodgett approaches, it is unclear whether these...

  • Magnetic properties of Fe-5d (Os, Ir, and Pt) nanowires encapsulated in carbon nanotubes. Wang, Junhua; Jo, Chulsu; Wu, Ruqian // Applied Physics Letters;1/21/2008, Vol. 92 Issue 3, p032507 

    Using the first-principles density functional calculations, we explored the magnetic properties of Fe–X (X=Os, Ir, and Pt) nanowires encapsulated in a (4,4) carbon nanotubes. It is found that these wires possess giant magnetic anisotropy energies due to sizable spin-orbit coupling along...

  • Realization of conductive InAs nanotubes based on lattice-mismatched InP/InAs core-shell nanowires. Mohan, Premila; Motohisa, Junichi; Fukui, Takashi // Applied Physics Letters;1/2/2006, Vol. 88 Issue 1, p013110 

    We report the realization of ordered arrays of single-crystalline InAs nanotubes by a simple pure-eptiaxial approach. The process involved the fabrication of lattice-mismatched InP/InAs core-shell nanowires using selective area metalorganic vapor phase epitaxy on InP (111)A substrates. The...

  • Alumina nanotubes and nanowires from Al-based porous alumina membranes. Shao, X. F.; Wu, X. L.; Huang, G. S.; Qiu, T.; Jiang, M.; Hong, J. M. // Applied Physics A: Materials Science & Processing;Aug2005, Vol. 81 Issue 3, p621 

    Using ultrasonic vibrations, we have successfully fabricated alumina nanotubes and nanowires from Al-based porous alumina membranes, which are the products of bulk aluminium in oxalic acid via electrochemical etching. Fine configurations and structures of the alumina nanotubes and nanowires are...

  • Template assisted fabrication of free-standing MnO2 nanotube and nanowire arrays and their application in supercapacitors. Grote, Fabian; Kühnel, Ruben-Simon; Balducci, Andrea; Yong Lei // Applied Physics Letters;2/3/2014, Vol. 104 Issue 5, p053904-1 

    In this Letter, an innovative technique is reported to control the fabrication of free-standing MnO2 nanotube and nanowire arrays. The synthesis is based on a three-step process, using porous anodic aluminum oxide as a template, and enables the selective fabrication of vertically aligned MnO2...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics