...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Huge enhancement of upconversion luminescence by dye/Nd3+ sensitization of quenching- shield sandwich structured upconversion nanocrystals under 808 nm excitation
【24h】

Huge enhancement of upconversion luminescence by dye/Nd3+ sensitization of quenching- shield sandwich structured upconversion nanocrystals under 808 nm excitation

机译：通过染料/ Nd3 + Undence-Nd3 +抑郁型突出型夹层的敏感性在808 nm励磁下的淬火夹层夹层的敏感性的巨大增强

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lanthanide-doped upconversion nanoparticles (UCNPs) have shown potential applications in diverse fields. However, their upconversion luminescence (UCL) intensity and excitation wavelength range are limited by the weak and narrowband absorption of lanthanide ions. Herein, we introduce and validate a strategy to largely increase the absorptivity and upconversion luminescence intensity under 808 nm excitation by broadband dye-sensitized quenching-shield sandwich structured upconversion nanocrystals NaLuF4:Gd, Yb, Tm@NaLuF4: Gd, Yb@NaNdF4: Yb. The dye molecules anchored on the surface of the UCNPs serve as an antenna which can broadly and strongly harvest NIR light. The Nd3+ facilitates the energy transfer and photon upconversion of the lanthanide activator at a biocompatible excitation wavelength (around 800 nm) with a significant increase in penetration ability and minimizes the overheating problem associated with conventional 980 nm excitation. The quenching-shield sandwich structure can greatly eliminate the deleterious cross-relaxation pathway between the activator and sensitizer. This approach combines the merits of the use of Nd3+ as a sensitizer, a quenching-shield sandwich structure and the "antenna" effect, leading to a tremendous enhancement of UCL under excitation at 808 nm. These well-designed UCNPs excited at 808 nm with improved optical performances will outperform conventional UCNPs excited at 980 nm and play an important role in the development of luminescent probes for future biological and medical applications.
机译：镧系掺杂的上转换纳米颗粒（UCNPS）在不同领域中显示了潜在的应用。然而，它们的上变发光（UCL）强度和激发波长范围受镧离子的弱和窄带的限制。在此，我们介绍并验证了通过宽带染料敏化淬火罩夹层结构升压纳米晶体NALUF4：GD，YB，TM @ NALUF4：GD，YB，YB @ NANDF4：GD，YB，YB @ NANDF4：GD，YB @ NANDF4：YB 。锚定在UCNP的表面上的染料分子用作可以广泛和强烈地收获NIR光的天线。 ND3 +促进镧系元素活化剂在生物相容性激发波长（约800nm）的能量转移和光子上转化，其渗透能力显着增加，并最大限度地减少与传统980nm激发相关的过热问题。淬火屏蔽夹层结构可以极大地消除活化剂和敏化剂之间的有害交叉弛豫途径。这种方法将使用ND3 +作为敏化剂的优点，淬火屏蔽夹层结构和“天线”效应，导致UCL在808nm的激发下进行巨大增强。这些精心设计的UCNP，在808nm中激发，具有改善的光学性能将优于980nm的常规UCNP，并在发光探头的开发中发挥重要作用，用于未来的生物和医学应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号