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Issue 46, 2011
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Synthesis of 1D and heavily doped Zn1−xCoxO six-prism nanorods: improvement of blue–green emission and room temperature ferromagnetism

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Abstract

In this work, one-dimensional (1D) and heavily doped Zn1−xCoxO (x = 0.05, 0.1, 0.15 and 0.2) nanorods (NRs) were successfully fabricated by a new solvothermal method. Such a Zn1−xCoxO nanorod exhibits a hexagonal prism-like microcrystal with a pyramidal top. Analyses from transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) indicated that Zn1−xCoxO NRs possess perfect single crystal wurtzite structures. The influence of Co doping on the structural, optical and magnetic properties of NRs was investigated in detail. It was verified that Co was successfully doped into the ZnO wurtzite lattice structure by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS). The Zn1−xCoxO NRs show an obvious blue–green emission except for the weak UV emission. The corresponding luminescence mechanism was discussed, and the environment of cobalt in the ZnO wurtzite lattice was also identified through UV-vis spectroscopy. In addition, the magnetic hysteresis (M–H) curves demonstrated that the Zn1−xCoxO NRs possess obvious ferromagnetic characteristics at room temperature. These Zn1−xCoxO NRs are suggested to have potential applications in spintronic, field emission and optoelectronic devices, etc.

Graphical abstract: Synthesis of 1D and heavily doped Zn1−xCoxO six-prism nanorods: improvement of blue–green emission and room temperature ferromagnetism

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Article information


Submitted
14 Jun 2011
Accepted
22 Sep 2011
First published
25 Oct 2011

J. Mater. Chem., 2011,21, 18810-18816
Article type
Paper

Synthesis of 1D and heavily doped Zn1−xCoxO six-prism nanorods: improvement of blue–green emission and room temperature ferromagnetism

T. Wang, Y. Liu, Y. Xu, G. He, G. Li, J. Lv, M. Wu, Z. Sun, Q. Fang, Y. Ma and J. Li, J. Mater. Chem., 2011, 21, 18810
DOI: 10.1039/C1JM12721G

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