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

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

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
JournalNanotechnology
Volume19
Issue number28
DOIs
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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  • Cite this

    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