Controlled Synthesis, Formation Mechanism, and Great Enhancement of Red Upconversion Luminescence of NaYF(4):Yb(3+), Er(3+) Nanocrystals/Submicroplates at Low Doping Level

	Controlled Synthesis, Formation Mechanism, and Great Enhancement of Red Upconversion Luminescence of NaYF(4):Yb(3+), Er(3+) Nanocrystals/Submicroplates at Low Doping Level
其他题名	论文其他题名
	Zhao J. W.; Sun Y. J.; Kong X. G.; Tian L. J.; Wang Y.; Tu L. P.; Zhao J. L.; Zhang H.
	2008
发表期刊	Journal of Physical Chemistry B
ISSN	1520-6106
卷号	112 期号:49 页码:15666-15672
摘要	Strong red upconversion luminescence of rare-earth ions doped in nanocrystals is desirable for the biological/biomedical applications. In this paper, we describe the great enhancement of red upconversion emission ((4)F(9/2) -> (4)I(15/2) transition of Er(3+) ion) in NaYF(4):Yb(3+), Er(3+) nanocrystals at low doping level, which is ascribed to the effectiveness of the multiphonon relaxation process due to the existence of citrate as a chelator and cross relaxation between Er(3+) ions. The dissolution-recrystallization transformation, governing both the intrinsic crystalline phase (cubic and/or hexagonal phase) and the growth regime (thermodynamic vs kinetic), is responsible for the phase control of the NaYF(4) crystals. The possible formation mechanism of the NaYF(4) crystals and the role of trisodium citrate which acts as a chelating agent and shape modifier are discussed in detail. It is also found that the alpha -> beta phase transition is favored by the high molar ratio of fluoride to lanthanide and high hydrothermal temperature as well as long hydrothermal time.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26420
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhao J. W.,Sun Y. J.,Kong X. G.,et al. Controlled Synthesis, Formation Mechanism, and Great Enhancement of Red Upconversion Luminescence of NaYF(4):Yb(3+), Er(3+) Nanocrystals/Submicroplates at Low Doping Level[J]. Journal of Physical Chemistry B,2008,112(49):15666-15672.
APA	Zhao J. W..,Sun Y. J..,Kong X. G..,Tian L. J..,Wang Y..,...&Zhang H..(2008).Controlled Synthesis, Formation Mechanism, and Great Enhancement of Red Upconversion Luminescence of NaYF(4):Yb(3+), Er(3+) Nanocrystals/Submicroplates at Low Doping Level.Journal of Physical Chemistry B,112(49),15666-15672.
MLA	Zhao J. W.,et al."Controlled Synthesis, Formation Mechanism, and Great Enhancement of Red Upconversion Luminescence of NaYF(4):Yb(3+), Er(3+) Nanocrystals/Submicroplates at Low Doping Level".Journal of Physical Chemistry B 112.49(2008):15666-15672.

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