TITLE

Field emission of carbon nanotubes on anodic aluminum oxide template with controlled tube density

AUTHOR(S)
Chen, Po-Lin; Chang, Jun-Kai; Kuo, Cheng-Tzu; Pan, Fu-Ming
PUB. DATE
March 2005
SOURCE
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p123111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The tube number density of aligned carbon nanotubes (CNTs) grown over the nanoporous anodic aluminum oxide (AAO) template can be directly controlled by adjusting the CH4/H2 feed ratio during the CNT growth. We ascribe the variation of the tube density as a function of the CH4/H2 feed ratio to the kinetic competition between outgrowth of cobalt-catalyzed CNTs from the AAO pore bottom and deposition of the amorphous carbon (a-C) overlayer on the AAO template. A pore-filling ratio of 18% to 82% for the nanotubes overgrown out of nanopores on the AAO template can be easily achieved by adjusting the CH4/H2 feed ratio. Enhanced field emission properties of CNTs were obtained by lowering the tube density on AAO. However, at a high CH4 concentration, a-C by-product deposit on the CNT surface can degrade the field emission property due to a high energy barrier and significant potential drop at the emission site.
ACCESSION #
16581704

 

Related Articles

  • Comparison of the field emissions between highly ordered carbon nanotubes with closed and open tips. Seon Mi Yoon, Vinayak P.; Joseok Chae, Vinayak P.; Jung Sang Suh // Applied Physics Letters;2/2/2004, Vol. 84 Issue 5, p825 

    We have studied the field emission from the closed and open tips of highly ordered carbon nanotubes fabricated on porous anodic aluminum oxide templates by changing the tube height. Due to the field-screening effect provoked by the proximity of the neighboring tubes, the field emission from both...

  • 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...

  • Hydrogen adsorption of open-tipped insufficiently graphitized multiwalled carbon nanotubes. Han Gao, M.; Xiao Bin Wu, M.; Ji Tao Li, M.; Guo Tao Wu, M.; Jian Yi Lin, M.; Kai Wu; Dong Sheng Xu, M. // Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3389 

    Open-tipped carbon nanotubes with a large amount of subnanopores and open ends on the tube wall were conveniently prepared by an improved anodized aluminum oxide template growth. The hydrogen storage was measured based on a volumetric method. Adsorptions of 6.46 and 1.12 wt % were achieved at 77...

  • Improved emission stability of single-walled carbon nanotube field emitters by plasma treatment. Won Seok Kim; Jeonghee Lee; Tae Won Jeong; Jung Na Heo; Byung Yoon Kong; Yong Wan Jin; Kim, J. M.; Sung Hee Cho; Jong Hwan Park; Choe, D. H. // Applied Physics Letters;10/17/2005, Vol. 87 Issue 16, p163112 

    We investigated the effect of plasma treatment on single-walled carbon nanotube (SWCNT) field emitters, which were fabricated by printing a photoimageable SWCNT paste, to improve emission lifetime. The treatment was performed by applying a dc pulsed voltage between two electrodes, where the...

  • Field emission patterns from multiwall carbon nanotubes with a cone-shaped tip. Saito, Yahachi; Tsujimoto, Yuhki; Koshio, Akira; Kokai, Fumio // Applied Physics Letters;5/21/2007, Vol. 90 Issue 21, p213108 

    Electron emission from multiwall carbon nanotubes (CNTs) with a cone-shaped tip, on the apex of which five pentagons are present, has been studied by field emission microscopy (FEM). Two types of FEM patterns were observed: one is a well-defined “pentagon” pattern that is typically...

  • Electron emission from a single Spindt-type emitter structure: Correlation of theory and experiment. Jensen, K.L.; Phillips, P.M. // Applied Physics Letters;5/13/1996, Vol. 68 Issue 20, p2807 

    Investigates the electron emission from Spindt-type molybdenum field emitter using nanofabricated anode. Beam dependence on tip sharpness, gate diameter and anode distance; Determination of the anode position from the emitter; Details on the theory-experiment correlation.

  • Field emission from vertically aligned conductive IrO[sub 2] nanorods. Reui-San Chen; Ying-Sheng Huang; Ya-Min Liang; Chim-Sung Hsieh, Ichiro; Dah-Shyang Tsai; Kwong-Kau Tiong, Ichiro // Applied Physics Letters;3/1/2004, Vol. 84 Issue 9, p1552 

    We report on the preparation and field-emission properties of vertically aligned conductive IrO[sub 2] nanorods. The unique geometrical features of IrO[sub 2] nanorods, including nanosized structure and self-assembled sharp tip, exhibit a strong effect on field enhancement (β∼40 000),...

  • An array of Eiffel-tower-shape AlN nanotips and its field emission properties. Yongbing Tang; Hongtao Cong; Zhigang Chen; Huiming Cheng // Applied Physics Letters;6/6/2005, Vol. 86 Issue 23, p233104 

    An array of Eiffel-tower-shape AlN nanotips has been synthesized and assembled vertically with Si substrate by a chemical vapor deposition method at 700 °C. The single-crystalline AlN nanotips along [001] direction, including sharp tips with 10–100 nm in diameter and submicron-sized...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics