Advertisement

Controlled Growth and Field-Emission Properties of Cobalt Oxide Nanowalls

Authors

  • T. Yu,

    1. Department of Physics, Blk S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
    Search for more papers by this author
  • Y. W. Zhu,

    1. Department of Physics, Blk S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
    2. National University of Singapore Nanoscience and Nanotechnology Initiative, Blk S13, 2 Science Drive 3, Singapore 117542, Singapore
    Search for more papers by this author
  • X. J. Xu,

    1. National University of Singapore Nanoscience and Nanotechnology Initiative, Blk S13, 2 Science Drive 3, Singapore 117542, Singapore
    2. Department of Mechanical Engineering, National University of Singapore, Blk E3A, 9 Engineering Drive 1, Singapore 117576, Singapore
    Search for more papers by this author
  • Z. X. Shen,

    1. Department of Physics, Blk S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
    Search for more papers by this author
  • P. Chen,

    1. Department of Physics, Blk S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
    Search for more papers by this author
  • C.-T. Lim,

    1. National University of Singapore Nanoscience and Nanotechnology Initiative, Blk S13, 2 Science Drive 3, Singapore 117542, Singapore
    2. Department of Mechanical Engineering, National University of Singapore, Blk E3A, 9 Engineering Drive 1, Singapore 117576, Singapore
    Search for more papers by this author
  • J. T.-L. Thong,

    1. National University of Singapore Nanoscience and Nanotechnology Initiative, Blk S13, 2 Science Drive 3, Singapore 117542, Singapore
    2. Department of Electrical and Computer Engineering, National University of Singapore, Blk E4, 4 Engineering Drive 3, Singapore 117576, Singapore
    Search for more papers by this author
  • C.-H. Sow

    1. Department of Physics, Blk S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542, Singapore
    2. National University of Singapore Nanoscience and Nanotechnology Initiative, Blk S13, 2 Science Drive 3, Singapore 117542, Singapore
    Search for more papers by this author

  • The authors acknowledge the support of NUSARF and NUSNNI. T. Yu acknowledges the support of Fellowship from Singapore Millennium Foundation.

Abstract

original image

Vertically oriented single-crystalline Co3O4 nanowalls (see Figure) have been successfully fabricated by directly heating Co foil in air using a hot plate. The morphologies of the Co3O4 nanowalls can be controlled by varying the growth temperature and time. The Co3O4 nanowalls show promising field-emission performance that is comparable to many other nanomaterials.

Ancillary