ZnO nanorods with two spatially distinct light emissions

Chien Lin Kuo, Ruey Chi Wang, Jow Lay Huang, Chuan Pu Liu, Yi Feng Lai, Cheng Yu Wang, Hung Chin Chung

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12 Citations (Scopus)


Single-crystalline ZnO nanorods emitting two characteristic optical emissions from opposite halves of the nanorods were synthesized by thermal chemical vapor deposition using Zn/Al mixed powders. Energy dispersive x-ray spectra with transmission electron microscopy show a gradually decreasing Zn:O atomic ratio from the root to the top of a nanorod, and the averaged ratios at the two ends are ≈57.2:42.8 and 49.5:50.5. Room-temperature cathodoluminescence measurements show that the nanorods exhibit a sharp ultraviolet emission at 377 nm from one segment and a broad green band at 500 nm from the other, which is attributed to different oxygen concentrations along the nanorods. The luminescence behavior suggests further applications for nano-pixel optoelectric devices.

Original languageEnglish
Article number285703
Issue number28
Publication statusPublished - 2008 Jul 16

All Science Journal Classification (ASJC) codes

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

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    Kuo, C. L., Wang, R. C., Huang, J. L., Liu, C. P., Lai, Y. F., Wang, C. Y., & Chung, H. C. (2008). ZnO nanorods with two spatially distinct light emissions. Nanotechnology, 19(28), [285703]. https://doi.org/10.1088/0957-4484/19/28/285703