...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Multicolor tuning towards single red-emission band of upconversion nanoparticles for tunable optical component and optical/x-ray imaging agents via Ce3+ doping
【24h】

Multicolor tuning towards single red-emission band of upconversion nanoparticles for tunable optical component and optical/x-ray imaging agents via Ce3+ doping

机译：通过Ce3 +掺杂向可转换的光学组件和光学/ x射线成像剂的上转换纳米粒子的单个红色发射带进行多色调谐

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

A simple strategy of Ce3+ doping is proposed to realize multicolor tuning and predominant red emission in BaLnF(5): Yb3+/Ho3+ (Ln(3+) = Gd3+, Y3+, Yb3+) systems. A tunable upconversion (UC) multicolor output from green/yellow to red can be readily achieved in a fixed Yb3+/Ho3+ composition by doping Ce3+, providing an effective route for multicolor tuning widely used for various optical components. Moreover, compared with Ce3+-free UC nanoparticles (UCNPs), a remarkable enhancement of the red-to-green (R/G) ratio is observed by doping 30% Ce3+, arising from the two largely promoted cross-relaxation (CR) processes between Ce3+ and Ho3+. UCNPs with pure red emission are selected as in vivo UC bioimaging agents, demonstrating the merits of deep penetration depth, the absence of autofluorescence and high contrast in small animal bioimaging. Moreover, such fluorescence imaging nanoprobes can also be used as contrast agents for three-dimensional (3D) x-ray bioimaging by taking advantage of the high K-edge values and x-ray absorption coefficients of Ba2+, Gd3+, and Ce3+ in our designed nanoprobes. Thus, the simultaneous realization of multicolor output, highly enhanced R/G ratio, and predominant red emission makes the Ce3+-doped UCNPs very useful for widespread applications in optical components and bioimaging.
机译：提出了一种简单的Ce3 +掺杂策略，以实现BaLnF（5）：Yb3 + / Ho3 +（Ln（3+）= Gd3 +，Y3 +，Yb3 +）系统中的多色调谐和主要的红色发射。通过掺杂Ce3 +，可以很容易地在固定的Yb3 + / Ho3 +成分中实现从绿色/黄色到红色的可调上转换（UC）多色输出，从而为广泛用于各种光学组件的多色调谐提供了有效的途径。此外，与不含Ce3 +的UC纳米颗粒（UCNPs）相比，通过掺杂30％的Ce3 +可以观察到红绿（R / G）比的显着提高，这是由两个大大促进的交叉松弛（CR）过程引起的在Ce3 +和Ho3 +之间。选择具有纯红色发射的UCNP作为体内UC生物成像剂，证明了小动物生物成像具有深穿透深度，不存在自发荧光和高对比度的优点。此外，这种荧光成像纳米探针还可以在我们设计的Ba2 +，Gd3 +和Ce3 +的高K边缘值和X射线吸收系数的情况下，用作三维（3D）X射线生物成像的造影剂。纳米探针。因此，同时实现多色输出，高度增强的R / G比和显着的红色发射，使得Ce3 +掺杂的UCNPs在光学组件和生物成像中的广泛应用非常有用。

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