Enhanced field emission properties of vertically aligned double-walled carbon nanotube arrays

Guohai Chen, Dong Hoon Shin, Takayuki Iwasaki, Hiroshi Kawarada, Cheol Jin Lee

    Research output: Contribution to journalArticle

    56 Citations (Scopus)

    Abstract

    Vertically aligned double-walled carbon nanotube (VA-DWCNT) arrays were synthesized by point-arc microwave plasma chemical vapor deposition on Cr/n-Si and SiO2/n-Si substrates. The outer tube diameters of VA-DWCNTs are in the range of 2.5-3.8 nm, and the average interlayer spacing is approximately 0.42 nm. The field emission properties of these VA-DWCNTs were studied. It was found that a VA-DWCNT array grown on a Cr/n-Si substrate had better field emission properties as compared with a VA-DWCNT array grown on a SiO 2/n-Si substrate and randomly oriented DWCNTs, showing a turn-on field of about 0.85 V μm-1 at the emission current density of 0.1 μA cm-2 and a threshold field of 1.67 V μm-1 at the emission current density of 1.0 mA cm-2. The better field emission performance of the VA-DWCNT array was mainly attributed to the vertical alignment of DWCNTs on the Cr/n-Si substrate and the low contact resistance between CNTs and the Cr/n-Si substrate.

    Original languageEnglish
    Article number415703
    JournalNanotechnology
    Volume19
    Issue number41
    DOIs
    Publication statusPublished - 2008 Oct 15

    Fingerprint

    Carbon Nanotubes
    Field emission
    Carbon nanotubes
    Substrates
    Current density
    Contact resistance
    Chemical vapor deposition
    Microwaves
    Plasmas

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Electrical and Electronic Engineering
    • Mechanical Engineering
    • Mechanics of Materials
    • Materials Science(all)

    Cite this

    Enhanced field emission properties of vertically aligned double-walled carbon nanotube arrays. / Chen, Guohai; Shin, Dong Hoon; Iwasaki, Takayuki; Kawarada, Hiroshi; Lee, Cheol Jin.

    In: Nanotechnology, Vol. 19, No. 41, 415703, 15.10.2008.

    Research output: Contribution to journalArticle

    Chen, Guohai ; Shin, Dong Hoon ; Iwasaki, Takayuki ; Kawarada, Hiroshi ; Lee, Cheol Jin. / Enhanced field emission properties of vertically aligned double-walled carbon nanotube arrays. In: Nanotechnology. 2008 ; Vol. 19, No. 41.
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