期刊
NANOSCALE RESEARCH LETTERS
卷 7, 期 -, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/1556-276X-7-372
关键词
Y-doped ZnO nanorods; Wurtzite; Saturation magnetization; Photoluminescence; Ferromagnetism
资金
- National Science Council of the Republic of China [NSC 101-2221-E-164-004, NSC 99-2221-E-005-103]
One-dimensional pure zinc oxide (ZnO) and Y-doped ZnO nanorod arrays have been successfully fabricated on the silicon substrate for comparison by a simple hydrothermal process at the low temperature of 90A degrees C. The Y-doped nanorods exhibit the same c-axis-oriented wurtzite hexagonal structure as pure ZnO nanorods. Based on the results of photoluminescence, an enhancement of defect-induced green-yellow visible emission is observed for the Y-doped ZnO nanorods. The decrease of E-2(H) mode intensity and increase of E-1(LO) mode intensity examined by the Raman spectrum also indicate the increase of defects for the Y-doped ZnO nanorods. As compared to pure ZnO nanorods, Y-doped ZnO nanorods show a remarked increase of saturation magnetization. The combination of visible photoluminescence and ferromagnetism measurement results indicates the increase of oxygen defects due to the Y doping which plays a crucial role in the optical and magnetic performances of the ZnO nanorods.
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