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

Fingerprint

Light emission
Nanorods
Cathodoluminescence
Powders
Luminescence
Chemical vapor deposition
Pixels
Oxygen
Crystalline materials
Transmission electron microscopy
X rays
Temperature

All Science Journal Classification (ASJC) codes

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

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
Kuo, Chien Lin ; Wang, Ruey Chi ; Huang, Jow-Lay ; Liu, Chuan-Pu ; Lai, Yi Feng ; Wang, Cheng Yu ; Chung, Hung Chin. / ZnO nanorods with two spatially distinct light emissions. In: Nanotechnology. 2008 ; Vol. 19, No. 28.
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ZnO nanorods with two spatially distinct light emissions. / Kuo, Chien Lin; Wang, Ruey Chi; Huang, Jow-Lay; Liu, Chuan-Pu; Lai, Yi Feng; Wang, Cheng Yu; Chung, Hung Chin.

In: Nanotechnology, Vol. 19, No. 28, 285703, 16.07.2008.

Research output: Contribution to journalArticle

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T1 - ZnO nanorods with two spatially distinct light emissions

AU - Kuo, Chien Lin

AU - Wang, Ruey Chi

AU - Huang, Jow-Lay

AU - Liu, Chuan-Pu

AU - Lai, Yi Feng

AU - Wang, Cheng Yu

AU - Chung, Hung Chin

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AB - 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.

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