Electron side-emission from corrugated CNx nanotubes

Che, R. C.; Peng, L.-M.; Wang, M. S.
November 2004
Applied Physics Letters;11/15/2004, Vol. 85 Issue 20, p4753
Academic Journal
Horizontally grown and vertically aligned carbon nitrogen (CNx) nanotubes encapsulated with Fe2O3 particles were synthesized on silicon substrates. Electron field-emission measurements were carried out on these CNx nanotubes using both the top-emission and side-emission geometries, and compared with that of the usual carbon nanotubes (CNTs). It was found that the turn-on field of the CN, nanotubes is at least ∼2 V/µm less and the field conversion factor under low bias voltage is about four times more than that of the CNTs. For the two types of CNx films, the field emission property of the horizontally grown honeycombed film is clearly better than that of the vertically aligned film, indicating that for the corrugated nanotubes the "side-emission" geometry is superior to the more widely used "top-emission" geometry. Electrostatic potential distributions were calculated for some simplified models of the nanotubes, these calculations suggest that the enhanced field-emission of the "side-emission" geometry could he attributed to the increased corrugation and lowered potential barrier along the side of the corrugated nanotube compared with that along the top of the usual carbon nanotube.


Related Articles

  • Two-process model of electron field emission from nanocarbons: Temperature effect. Aitman, Igor S; Pikhitsa, Peter V.; Choi, Mansoo // Journal of Applied Physics;9/15/2004, Vol. 96 Issue 6, p3491 

    The two-process model on electron field emission from nanocarbons that we recently suggested [ I. S. Altman, P. V. Pikhitsa, and M. Choi, Appl. Phys. Lett. 84, 1126 (2004) ] has solved the existing experimental puzzles such as an occurrence of the sharp knee in the Fowler-Nordheim (FN) plot. Our...

  • Robust and regenerable integrally gated carbon nanotube field emitter arrays. Hsu, David S. Y.; Shaw, Jonathan L. // Journal of Applied Physics;7/1/2005, Vol. 98 Issue 1, p014314 

    We have grown multiwalled carbon nanotubes by chemical-vapor deposition on two types of gated structures, one containing a silicon post, and another having an open aperture. A gate current to anode-current ratio of 2.5%, the lowest of any nanotube field emitter arrays was measured for the open...

  • Electron field emission from composite electrodes of carbon nanotubes-boron-doped diamond and carbon felts. Rosolen, J. Mauricio; Tronto, Simone; Marchesin, Marcel S.; Almeida, Erica C.; Ferreira, Neidenei G.; Patrick Poá, C. H.; Silva, S. Ravi P. // Applied Physics Letters;2/20/2006, Vol. 88 Issue 8, p083116 

    The electron field emission of carbon nanotube (CNT)/boron-doped diamond (BDD)/carbon felt electrodes (CNT/BDD/felt) have been investigated. The composite electrode was initially prepared with the growth of BDD on carbon felt and the subsequent growth of CNT by chemical decomposition of...

  • Geometrical enhancement of field emission of individual nanotubes studied by in situ transmission electron microscopy. Zhi Xu; Bai, X. D.; Wang, E. G. // Applied Physics Letters;3/27/2006, Vol. 88 Issue 13, p133107 

    Field emission of an individual multiwalled carbon nanotube, driven by a customer-built piezomanipulator, was measured in a transmission electron microscope. The measurement geometry and the nanotube structure were imaged in situ. A linear dependence of field enhancement factor β on the...

  • Ultrahigh Electron Emissive Carbon Nanotubes with Nano-sized RuO2 Particles Deposition. Ruth Knibbe; Kazuhiro Nogita; John Drennan; Katsuyoshi Tatenuma; Pou Liu; Fumihito Arai; Eiji Yashima; Michiru Nishiwaki // Journal of Nanoparticle Research;Dec2007, Vol. 9 Issue 6, p1201 

    Abstract  Multi-wall carbon nanotubes (MWNTs) have a great commercial potential as electron field emitters, but suffer from fundamental problems such as stability and brightness. By depositing the MWNTs with nano-sized ruthenium dioxide (RuO2) particles, a new high performance emitter has...

  • Enhancement of field emission characteristics of tungsten emitters by single-walled carbon nanotube modification. Ferrer, D.; Tanii, T.; Matsuya, I.; Zhong, G.; Okamoto, S.; Kawarada, H.; Shinada, T.; Ohdomari, I. // Applied Physics Letters;1/16/2006, Vol. 88 Issue 3, p033116 

    We present a simple method for improving the field emission performance of tungsten-tip electron sources based on single-walled carbon nanotube (SWCNT) modification. By coating a sandwich-like thin film of Al–Fe–Al (with Fe as a catalyst) on a tungsten tip, SWCNTs were synthesized...

  • Field emission of individual carbon nanotube with in situ tip image and real work function. Zhi Xu; Bai, X. D.; Wang, E. G.; Wang, Zhong L. // Applied Physics Letters;10/17/2005, Vol. 87 Issue 16, p163106 

    The field emission properties of individual multiwalled carbon nanotubes have been measured simultaneously in correlation to the emitter images and their real work functions at tips by the in situ transmission electron microscopy method. The field emission of a single nanotube still follows the...

  • Influence of charged particles on the fullerene formation process. Afanas’ev, D. V.; Dyuzhev, G. A.; Karataev, V. I. // Technical Physics Letters;Mar99, Vol. 25 Issue 3, p182 

    The influence of charged particles on the process of fullerene formation is determined. Systematic experiments are used to show that the presence of carbon ions in the fullerene formation zone substantially increases the fullerene content in the soot.

  • On the Mechanism of Formation of Fullerenes and Carbon Nanotubes. Krasin'kova, M. V.; Paugurt, A. P. // Technical Physics Letters;Apr2005, Vol. 31 Issue 4, p316 

    A possible mechanism of the formation of fullerenes and carbon nanotubes is proposed that is based on the notion of the strongly correlated state of π electrons in these materials (as well as in graphene layers). The presence of this state, in which the π electron densities on both sides...


Read the Article


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

Try another library?
Sign out of this library

Other Topics