Field-Emission Behavior of a Carbon-Nanotube-Implanted Co Nanocomposite Fabricated from Pearl-Necklace-Structured Carbon Nanotube/Co Powders

Authors

  • S. I. Cha,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • K. T. Kim,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • S. N. Arshad,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • C. B. Mo,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • K. H. Lee,

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • S. H. Hong

    1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong Yusung-Gu, Daejeon 305-701, Korea
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  • This research was supported by a grant (code No. 05K1501-00 510) from the “Center for Nanostructured Materials Technology” under the “21st Century Frontier R&D Programs” of the Ministry of Science and Technology, Korea. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

original image

Pearl-necklace-structured CNT/Co nanocomposite powders, with spherical Co nanoparticles threaded by penetrating CNTs, have been fabricated using a molecular process. The nanocomposite powders have been screen-printed and sintered into CNT-implanted Co nanocomposite emitters, with the CNTs standing upright on the surface of the substrate. The CNT-implanted Co nanocomposite emitters show outstanding field-emission behavior, including a low turn-on electric field and high current density.

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