ZnO/Al2O3 core-shell nanorod arrays: Growth, structural characterization, and luminescent properties

C. Y. Chen; C. A. Lin; M. J. Chen; G. R. Lin; J. H. He

doi:10.1088/0957-4484/20/18/185605

ZnO/Al₂O₃ core-shell nanorod arrays: Growth, structural characterization, and luminescent properties

C. Y. Chen, C. A. Lin, M. J. Chen, G. R. Lin, J. H. He

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78 Scopus citations

Abstract

We report an aqueous chemical method to fabricate well-aligned ZnO/Al ₂O₃ nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of α- Al₂O₃ nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al₂O₃ NC shells. The Al ₂O₃ NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

Original language	English (US)
Article number	185605
Journal	Nanotechnology
Volume	20
Issue number	18
DOIs	https://doi.org/10.1088/0957-4484/20/18/185605
State	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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title = "ZnO/Al2O3 core-shell nanorod arrays: Growth, structural characterization, and luminescent properties",

abstract = "We report an aqueous chemical method to fabricate well-aligned ZnO/Al 2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of α- Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al 2O3 NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.",

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T2 - Growth, structural characterization, and luminescent properties

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AU - Lin, C. A.

AU - Chen, M. J.

AU - Lin, G. R.

AU - He, J. H.

PY - 2009

Y1 - 2009

N2 - We report an aqueous chemical method to fabricate well-aligned ZnO/Al 2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of α- Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al 2O3 NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

AB - We report an aqueous chemical method to fabricate well-aligned ZnO/Al 2O3 nanocrystal (NC) core-shell nanorod arrays (NRAs). Structural characterization showed that the shell layers are composed of α- Al2O3 nanocrystals. Photoluminescence measurements showed the enhancement of near-band-edge (NBE) emission of ZnO NRAs due to the presence of Al2O3 NC shells. The Al 2O3 NC shell layer resulting in the flat-band effect near the ZnO surface leads to a stronger overlap of the wavefunctions of electrons and holes in the ZnO core, further enhancing the NBE emission. This approach should be very useful in designing many other core-shell NRAs for creating varieties of high-efficiency optoelectronic devices.

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ZnO/Al₂O₃ core-shell nanorod arrays: Growth, structural characterization, and luminescent properties

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