Remarkably enhanced photoluminescence of hexagonal GdPO4 center dot nH(2)O:Eu with decreasing size

	Remarkably enhanced photoluminescence of hexagonal GdPO4 center dot nH(2)O:Eu with decreasing size
其他题名	论文其他题名
	Lu S. Z.; Zhang J. H.; Zhang J. S.; Zhao H. F.; Luo Y. S.; Ren X. G.
	2010
发表期刊	Nanotechnology
ISSN	0957-4484
卷号	21 期号:36
摘要	The hexagonal rhabdophane-type GdPO4 hydrate (GdPO4 center dot nH(2)O) was synthesized via a simple hydrothermal process. The size and morphology of the products can be tunable by adjusting the pH of reaction systems through the addition of aqueous NaOH. The nanorods with a width of 50-100 nm and a length of about 1 mu m were obtained in the absence of NaOH (pH = 2), while a significant reduction of size (width: similar to 10 nm, length: similar to 50 nm) was observed for the product synthesized in the presence of NaOH (pH = 10). Surprisingly, the small-sized product exhibits a remarkably enhanced photoluminescence quantum yield and long excited state lifetime in comparison with those of the large-sized product. This abnormal luminescence phenomenon is discussed and explained. The EDS and XPS measurements revealed the presence of Na+ in the small-sized samples. These Na+ cations were probably bonded to the surface O2- dangling bonds, which thus reduces the number of surface defects that usually serve as the nonradiative energy transfer center channels. A considerable reduction of surface defect centers results in the increase of the emission efficiency and excited state lifetime in a small-sized sample. Obviously, the controlled synthesis of rare-earth-doped nanoparticles with a small size, but with relatively strong luminescence, is significant for their applications in the areas of technologies including optoelectronics, sensing and bioimaging.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24765
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Lu S. Z.,Zhang J. H.,Zhang J. S.,et al. Remarkably enhanced photoluminescence of hexagonal GdPO4 center dot nH(2)O:Eu with decreasing size[J]. Nanotechnology,2010,21(36).
APA	Lu S. Z.,Zhang J. H.,Zhang J. S.,Zhao H. F.,Luo Y. S.,&Ren X. G..(2010).Remarkably enhanced photoluminescence of hexagonal GdPO4 center dot nH(2)O:Eu with decreasing size.Nanotechnology,21(36).
MLA	Lu S. Z.,et al."Remarkably enhanced photoluminescence of hexagonal GdPO4 center dot nH(2)O:Eu with decreasing size".Nanotechnology 21.36(2010).

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