Changchun Institute of Optics,Fine Mechanics and Physics,CAS
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
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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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