Growth and field-emission properties of single-crystalline conic ZnO nanotubes

Ruey Chi Wang, Chuan-Pu Liu, Jow-Lay Huang, Shu Jen Chen

研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)


Single-crystalline conic ZnO nanotubes were synthesized on Si(001) without catalysts by thermal chemical vapour deposition at 475 °C. The nanotubes grown along the ZnO [0001] direction are sharp open-ended tips consisting of planar defects revealed by transmission electron microscopy and scanning electron microscopy. The nanotubes were formed by self-assembly of numerous six-radiated branches of hexagram nanosheets. The diameters and the wall thicknesses of the nanotubes are in the ranges 30-100 and 15-30 nm, respectively. The lengths and areal densities of the nanotubes are around 0.5 νm and 1-9 × 10 8 cm -2 , respectively. Field-emission measurements on the conic nanotubes show a low turn-on field of 3.5 V νm -1 at 10 νA cm -2 . The field-emission properties related to the nanotube density and geometry and the nonlinearity in the Fowler-Nordheim (FN) plot at lower field region are discussed.

頁(從 - 到)753-757
出版狀態Published - 2006 二月 14

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 化學 (全部)
  • 材料科學(全部)
  • 材料力學
  • 機械工業
  • 電氣與電子工程


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