TITLE

Stable, self-ballasting field emission from zinc oxide nanowires grown on an array of vertically aligned carbon nanofibers

AUTHOR(S)
Li, C.; Zhang, Y.; Mann, M.; Hiralal, P.; Unalan, H. E.; Lei, W.; Wang, B. P.; Chu, D. P.; Pribat, D.; Amaratunga, G. A. J.; Milne, W. I.
PUB. DATE
April 2010
SOURCE
Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p143114
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A structure composed of zinc oxide nanowires (ZNWs) grown hydrothermally on an array of vertically aligned carbon nanofibers (CNFs) was fabricated and its field emission properties determined and compared with bare CNF arrays. The combination produced a macroscopic turn-on field of 1.2 V/μm which was found to be the lowest reported from ZNWs deposited on a two-dimensional substrate and much less than the equivalent CNFs array (5.2 V/μm). Crucially, field emission was found to be much more stable at higher pressures of 5×10-6 mbar without exhibiting current degradation for a fixed external field, while emitting with a current density of 1 mA/cm2, the current density typically required for backlighting and field emission displays. We propose a self-ballasting mechanism, in which the low carrier density in the zinc oxide prevents current runaway in the presence of adsorbed species.
ACCESSION #
49071238

 

Related Articles

  • Field emission from a single carbon nanofiber at sub 100 nm gap. Sim, H. S.; Lau, S. P.; Ang, L. K.; You, G. F.; Tanemura, M.; Yamaguchi, K.; Zamri, M.; Yusop, M. // Applied Physics Letters;7/14/2008, Vol. 93 Issue 2, p023131 

    The authors report the electron field emission from a single carbon nanofiber (CNF) over a range of anode to CNF tip separations of 20–5500 nm. Our results show that the field enhancement factor γ is associated with the electrode separation (S). The modified Miller equation is a...

  • Zinc oxide single-crystal microtubes. Jiping Cheng; Ruyan Guo; Qing-Ming Wang // Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5140 

    ZnO single-crystal microtubes were fabricated using an encapsulated microwave growth method. The ZnO crystals are grown in hexagonal hollow tube form with a well faceted end and side surfaces, which have cross-sectional dimensions of 100 to 250 μm, lengths of 3–5 mm, and wall thickness...

  • Stable field emission from hydrothermally grown ZnO nanotubes. Wei, A.; Sun, X. W.; Xu, C. X.; Dong, Z. L.; Yu, M. B.; Huang, W. // Applied Physics Letters;5/22/2006, Vol. 88 Issue 21, p213102 

    Zinc oxide nanotube arrays were prepared by hydrothermal reaction in ammonia and zinc chloride solutions, and the field emission properties were tested. The turn-on field of the field emission was extrapolated to be about 7.0 V/μm at a current density of 0.1 μA/cm2. Meanwhile, the emission...

  • Field emission from well-aligned zinc oxide nanowires grown at low temperature. Lee, C. J.; Lee, T. J.; Lyu, S. C.; Zhang, Y.; Ruh, H.; Lee, H. J. // Applied Physics Letters;11/4/2002, Vol. 81 Issue 19, p3648 

    Field electron emission from vertically well-aligned zinc oxide (ZnO) nanowires, which were grown by the vapor deposition method at a low temperature of 550 °C, was investigated. The high-purity ZnO nanowires showed a single crystalline wurtzite structure. The turn-on voltage for the ZnO...

  • Electrochemically deposited zinc oxide arrays for field emission. Xu, C. X.; Sun, X. W.; Fang, S. N.; Yang, X. H.; Yu, M. B.; Zhu, G. P.; Cui, Y. P. // Applied Physics Letters;4/17/2006, Vol. 88 Issue 16, p161921 

    Periodic zinc oxide rod arrays were fabricated on patterned templates by electrochemical deposition and were employed as field emitters. The morphology and crystal structure of the zinc oxide array were examined by scanning electron microscopy and x-ray diffraction, respectively. The dependence...

  • Synthesis and field-emission properties of roselike ZnO nanostructures. Xu, L. L.; Wu, X. L.; Xiong, X.; Zhu, J.; Chen, H. T.; Huang, G. S.; Chu, P. K. // Applied Physics A: Materials Science & Processing;May2008, Vol. 91 Issue 2, p247 

    Self-assembled roselike ZnO nanostructures were synthesized via thermal evaporation of zinc powders without catalytic assistance at the relatively low temperature of 550 °C. The roselike structures consist of a large number of ZnO nanorods that uniformly arrange into hexagonal multilayers....

  • Field emission of one-dimensional micro- and nanostructures of zinc oxide. Yang, Y. H.; Wang, B.; Xu, N. S.; Yang, G. W. // Applied Physics Letters;7/24/2006, Vol. 89 Issue 4, p043108 

    A variety of one-dimensional (1D) micro- and nanostructures of zinc oxide (ZnO) were self-assembled on amorphous carbons using thermal chemical vapor transport and condensation without any metal catalysts. The low turn-on electronic field and the higher current density were achieved on these 1D...

  • Field emission from individual thin carbon nanotubes. de Jonge, Niels; Allioux, Myriam; Doytcheva, Maya; Kaiser, Monja; Teo, Kenneth B. K.; Lacerda, Rodrigo G.; Milne, William I. // AIP Conference Proceedings;2004, Vol. 723 Issue 1, p485 

    Individual thin carbon nanotubes with closed ends were mounted on tungsten support tips and their surfaces were thoroughly cleaned. We show these carbon nanotube electron emitters have Fowler-Nordheim behavior and we observed no deviation from this model for thin nanotubes. The measurements were...

  • Low-threshold field electron emission from carbon nanoclusters formed upon cold destruction of graphite. Fursey, G. N.; Petrick, V. I.; Novikov, D. V. // Technical Physics;Jul2009, Vol. 54 Issue 7, p1048 

    The field-emission characteristics of carbon nanoclusters (graphenes, nanotubes, their compositions with microdiamonds) produced by the cold destruction of natural graphite are studied. The structure of a coating of carbon nanoclusters on a tungsten cathode is examined by field emission...

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