表面涂层对能量迁移中介上升转换的影响
Qianqian Su1, Sanyang Han, Xiaoji Xie
1Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Journal of the American Chemical Society
|December 6, 2012
概括
具有新型核心外结构的兰化物添加的升级转化纳米粒子显示了增强的光学性能. 这种设计可以防止能量损失,为各种应用提供高效的发光.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 光学是什么?光学是什么?光学是什么?
背景情况:
- 用兰化物添加的升级转化纳米粒子 (UCNPs) 正在研究用于数据存储,生物成像和药物输送的应用.
- 激发能量的表面火通常会限制UCNP的效率.
研究的目的:
- 设计和合成具有改进光学性能的新型核心UCNP.
- 调查防止表面火和提高发光效率的策略.
主要方法:
- 合理设计和合成的NaGdF(4)@NaGdF(4) 核心UCNP.
- 一个光学惰性的NaYF(4) 贝的向生长.
- 光学属性的表征和机械学的研究.
主要成果:
- 该NaYF(4) 有效地防止了激发能量的表面火.
- 可调节的上转换排放得到了各种激活剂 (Dy(3+),Sm(3+),Tb(3+),Eu(3+)) 在低兴奋剂度下实现.
- 从Tb(3+) 和Eu(3+) 的有效排放首次通过同质兴奋剂实现.
结论:
- 开发的核心外UCNP由于惰性外而表现出前所未有的光学特性.
- 这种策略提供了高效的能量迁移和捕获,导致增强的发光.
- 这些先进的发光纳米材料具有重要的生物和能源应用的前景.
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