来自Ce和Ce/Ho化YPO纳米粒子的UV-A闪和持久发光
Paul Ganigal1, David Van der Heggen2, Philippe F Smet2
1ICGM, CNRS UMR 5253, Université Montpellier, ENSCM, Montpellier 34293, France. aurelie.bessiere@umontpellier.fr.
Physical chemistry chemical physics : PCCP
|November 12, 2025
概括
经过Ce3+化的YPO纳米颗粒显示出作为UV-A发射纳米闪电器的前景. 化增强了它们的辐射发光,而Ho3+联合剂使生物医学应用中持续的UV-A发光成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 发光的光度是非常的低.
背景情况:
- 酸 (YPO4) 纳米粒子正在探索用于光学应用.
- 用 (Ce3+) 和 (Ho3+) 进行兴奋剂可以改变它们的发光特性.
研究的目的:
- 为了合成Ce3+-和Ce3+/Ho3+化YPO纳米粒子.
- 评估它们作为UV-A发射纳米闪电器和持久发光纳米的潜力.
- 研究和共对它们的光学性能的影响.
主要方法:
- 微波辅助的YPO4纳米粒子的热水合成.
- 在1100°C的合成后回火.
- 光发光 (PL) 和辐射发光 (RL) 的表征.
- 在X射线激发下持续发光的研究.
主要成果:
- 合成的纳米粒子显示出纳米性和Ce3+光发光.
- 化显著增强了PL和RL,达到 ~ 37% 的批量样本强度.
- 化纳米粒子表现出快速闪 (衰变时间~27 ns).
- 与Ho3+联合剂诱导了持续的UV-A发光,在0.5/0.5mol%Ce/Ho时是最佳的.
- Ce3+作为一个深孔陷,Ho3+作为一个浅层电子陷.
结论:
- Ce3+和Ce3+/Ho化YPO纳米粒子具有双模式光学功能.
- 它们提供快速闪和持续的UV-A发射.
- 这些特性,加上YPO的稳定性和生物相容性,使其适用于需要深层组织UV-A发射的生物医学应用.
相关概念视频
Photoluminescence: Applications
983
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
983
Photoluminescence: Fluorescence and Phosphorescence
3.4K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
3.4K
Variables Affecting Phosphorescence and Fluorescence
1.2K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.2K
Fluorescence and Phosphorescence: Instrumentation
1.4K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.4K


