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[Author] Mohd Zamri Bin Mohd YUSOP(1hit)

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  • Morphological Control of Ion-Induced Carbon Nanofibers and Their Field Emission Properties

    Mohd Zamri Bin Mohd YUSOP  Pradip GHOSH  Zhipeng WANG  Masaki TANEMURA  Yasuhiko HAYASHI  Tetsuo SOGA  

     
    PAPER-Fundamentals for Nanodevices

      Vol:
    E92-C No:12
      Page(s):
    1449-1453

    Carbon nanofibers (CNFs) were fabricated on graphite plates using "Ar+ ion sputtering method" in large amount at room temperature. The morphology of CNFs was controlled by a simultaneous carbon supply during ion sputtering. CNF-tipped cones were formed on graphite plate surfaces without carbon supply whereas those with a simultaneous carbon supply featured mainly needle-like protrusions of large size. The field electron emission (FE) properties, measured using parallel plate configurations in 10-4 Pa range, showed the threshold fields of 4.4 and 5.2 V/µm with a current density of 1 µA/cm2 for CNF-tipped cones and needle-like protrusion, respectively. Reliability test results indicated that CNF-tipped cones were more stable than needle-like protrusion. The morphological change after reliability test showed a so-called "self-regenerative" process and structure damage for CNF-tipped cones and needle-like protrusions, respectively.