Synthesis and optical properties of ZnO-ZnS core-shell nanotube arrays

Hung Chou Liao; Pai Chia Kuo; Chin Ching Lin; San-Yuan Chen

doi:10.1116/1.2232456

Synthesis and optical properties of ZnO-ZnS core-shell nanotube arrays

Hung Chou Liao, Pai Chia Kuo, Chin Ching Lin, San-Yuan Chen^*

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Heterostructured ZnO-ZnS core-shell nanotube arrays with the diameters of 50-80 nm and lengths up to 1 μm were synthesized by a two-step chemical reaction. First, the ZnO layer was grown by atomic-layer deposition. It was found that the preferred growth orientation was strongly dependent on the substrate temperature. After sulfuration conversion from arrayed ZnO nanorods, the ZnS-ZnO composite arrays can be successfully prepared, as evidenced from transmission electron microscopy. This confirms that the ZnO-ZnS core-shell nanotube-arrayed structure has been fabricated. X-ray photoelectron spectroscopy analysis indicates that the binding energy of S 2p is the same as that of bulk single-crystal ZnS and that the Zn 2p_3/2 peak is shifted about 0.5 eV due to the formation of Zn-S bonds. Photoluminescence shows the relative-intensity ratio of ultraviolet emission (I_UV) to deep-level emission (I_DLE) for ZnO/ZnS core-shell nanotubes can be enhanced to be nine times that of original ZnO nanotubes.

Original language	English
Pages (from-to)	2198-2201
Number of pages	4
Journal	Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
Volume	24
Issue number	5
DOIs	https://doi.org/10.1116/1.2232456
State	Published - 9 Oct 2006

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title = "Synthesis and optical properties of ZnO-ZnS core-shell nanotube arrays",

abstract = "Heterostructured ZnO-ZnS core-shell nanotube arrays with the diameters of 50-80 nm and lengths up to 1 μm were synthesized by a two-step chemical reaction. First, the ZnO layer was grown by atomic-layer deposition. It was found that the preferred growth orientation was strongly dependent on the substrate temperature. After sulfuration conversion from arrayed ZnO nanorods, the ZnS-ZnO composite arrays can be successfully prepared, as evidenced from transmission electron microscopy. This confirms that the ZnO-ZnS core-shell nanotube-arrayed structure has been fabricated. X-ray photoelectron spectroscopy analysis indicates that the binding energy of S 2p is the same as that of bulk single-crystal ZnS and that the Zn 2p3/2 peak is shifted about 0.5 eV due to the formation of Zn-S bonds. Photoluminescence shows the relative-intensity ratio of ultraviolet emission (IUV) to deep-level emission (IDLE) for ZnO/ZnS core-shell nanotubes can be enhanced to be nine times that of original ZnO nanotubes.",

author = "Liao, {Hung Chou} and Kuo, {Pai Chia} and Lin, {Chin Ching} and San-Yuan Chen",

year = "2006",

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doi = "10.1116/1.2232456",

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T1 - Synthesis and optical properties of ZnO-ZnS core-shell nanotube arrays

AU - Liao, Hung Chou

AU - Kuo, Pai Chia

AU - Lin, Chin Ching

AU - Chen, San-Yuan

PY - 2006/10/9

Y1 - 2006/10/9

N2 - Heterostructured ZnO-ZnS core-shell nanotube arrays with the diameters of 50-80 nm and lengths up to 1 μm were synthesized by a two-step chemical reaction. First, the ZnO layer was grown by atomic-layer deposition. It was found that the preferred growth orientation was strongly dependent on the substrate temperature. After sulfuration conversion from arrayed ZnO nanorods, the ZnS-ZnO composite arrays can be successfully prepared, as evidenced from transmission electron microscopy. This confirms that the ZnO-ZnS core-shell nanotube-arrayed structure has been fabricated. X-ray photoelectron spectroscopy analysis indicates that the binding energy of S 2p is the same as that of bulk single-crystal ZnS and that the Zn 2p3/2 peak is shifted about 0.5 eV due to the formation of Zn-S bonds. Photoluminescence shows the relative-intensity ratio of ultraviolet emission (IUV) to deep-level emission (IDLE) for ZnO/ZnS core-shell nanotubes can be enhanced to be nine times that of original ZnO nanotubes.

AB - Heterostructured ZnO-ZnS core-shell nanotube arrays with the diameters of 50-80 nm and lengths up to 1 μm were synthesized by a two-step chemical reaction. First, the ZnO layer was grown by atomic-layer deposition. It was found that the preferred growth orientation was strongly dependent on the substrate temperature. After sulfuration conversion from arrayed ZnO nanorods, the ZnS-ZnO composite arrays can be successfully prepared, as evidenced from transmission electron microscopy. This confirms that the ZnO-ZnS core-shell nanotube-arrayed structure has been fabricated. X-ray photoelectron spectroscopy analysis indicates that the binding energy of S 2p is the same as that of bulk single-crystal ZnS and that the Zn 2p3/2 peak is shifted about 0.5 eV due to the formation of Zn-S bonds. Photoluminescence shows the relative-intensity ratio of ultraviolet emission (IUV) to deep-level emission (IDLE) for ZnO/ZnS core-shell nanotubes can be enhanced to be nine times that of original ZnO nanotubes.

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SN - 1071-1023

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Synthesis and optical properties of ZnO-ZnS core-shell nanotube arrays

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