Remarkably enhanced photoluminescence of hexagonal GdPO4&bull nH2O:Eu with decreasing size

	Remarkably enhanced photoluminescence of hexagonal GdPO4&bull nH2O:Eu with decreasing size
其他题名	论文其他题名
	Lu S.; Zhang J.; Zhao H.; Luo Y.; Ren X.
	2010
发表期刊	Nanotechnology
ISSN	9574484
卷号	21 期号:36
摘要	The hexagonal rhabdophane-type GdPO4 hydrate (GdPO 4&bullnH2O) 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 \m were obtained in the absence of NaOH (pH = 2), while a significant reduction of size (width: 10 nm, length: 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. 2010 IOP Publishing Ltd.
收录类别	EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24467
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.,Zhang J.,Zhao H.,et al. Remarkably enhanced photoluminescence of hexagonal GdPO4&bull nH2O:Eu with decreasing size[J]. Nanotechnology,2010,21(36).
APA	Lu S.,Zhang J.,Zhao H.,Luo Y.,&Ren X..(2010).Remarkably enhanced photoluminescence of hexagonal GdPO4&bull nH2O:Eu with decreasing size.Nanotechnology,21(36).
MLA	Lu S.,et al."Remarkably enhanced photoluminescence of hexagonal GdPO4&bull nH2O:Eu with decreasing size".Nanotechnology 21.36(2010).

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