Preparation and surface effect analysis of trivalent europium-doped nanocrystalline La2O2S

	Preparation and surface effect analysis of trivalent europium-doped nanocrystalline La2O2S
其他题名	论文其他题名
	Peng H. S.; Huang S. H.; You F. T.; Chang J. J.; Lu S. Z.; Cao L.
	2005
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	109 期号:12 页码:5774-5778
摘要	La2O2S:Eu3+ nanocrysytals (NCs) with a mean size of 18 nm are prepared by gel thermolysis. The morphology of the particles is hexagonal. The surface Eu3+ ions are first detected by time-resolved spectra in the D-5(0) -> F-7(1) region. Because the symmetry of the sites occupied by surface Eu3+ ions is lower, the D-5(0) -> F-7(1)(E) line, which is doubly degenerate in the bulk crystal, is split, and the fluorescence lifetime becomes shorter. The results of the laser-selective excitation indicate that the degradation of the site symmetry of Eu3+ seems to be abrupt, which means the as-synthesized La2O2S:Eu3+ NCs might be of the La2O2S/La2O2-xS1+x core-shell structure and the shell are not in a disordered state but a rather pure one.
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/181722/25004
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Peng H. S.,Huang S. H.,You F. T.,et al. Preparation and surface effect analysis of trivalent europium-doped nanocrystalline La2O2S[J]. Journal of Physical Chemistry B,2005,109(12):5774-5778.
APA	Peng H. S.,Huang S. H.,You F. T.,Chang J. J.,Lu S. Z.,&Cao L..(2005).Preparation and surface effect analysis of trivalent europium-doped nanocrystalline La2O2S.Journal of Physical Chemistry B,109(12),5774-5778.
MLA	Peng H. S.,et al."Preparation and surface effect analysis of trivalent europium-doped nanocrystalline La2O2S".Journal of Physical Chemistry B 109.12(2005):5774-5778.

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