相关实验视频
Updated: May 13, 2025

07:03
Low-energy Cathodoluminescence for OxyNitride Phosphors
Published on: November 15, 2016
10.6K
在LaF3:Er3+纳米粒子中,形态演变和NIR-II发光增强
Puyan Hao1, Tingting Li1, Jiahui Ren1
1Collaborative Innovation Center of Rare-Earth Optical Functional Materials and Devices Development, School of Physics and Opto-Electronic Technology, Baoji University of Arts and Sciences, Baoji 721016, China.
概括
研究人员开发了用于第二次近红外 (NIR-II) 成像的增强型化纳米粒子. 用兴奋剂提高了NIR-II发光率8.4倍,为深层组织成像推进了纳米探测器.
科学领域:
- 材料科学 材料科学 材料科学
- 生物医学成像技术 生物医学成像技术
- 纳米技术纳米技术
背景情况:
- 第二次近红外 (NIR-II) 发光成像 (1000-1700nm) 提供了优越的组织透和减少的自发光.
- 开发NIR-II纳米探测器受到形态,尺寸和发光强度的限制所阻碍.
研究的目的:
- 为了合成和表征NIR-II发射酸 (LaF3) 纳米粒子 (NP).
- 通过兴奋剂来增强LaF3:Er3+NP的NIR-II发光强度.
- 为开发先进的NIR-II发光成像纳米探测器提供参考.
主要方法:
- 通过一种简单的化学沉方法合成的LaF3:Er3+纳米粒子 (NP).
- 通过调整反应条件,精确控制NP的大小和形态.
- 通过对 (Zr4+) 进行兴奋剂来增强NIR-II发光.
主要成果:
- 成功合成了具有受控大小和形态的LaF3:Er3+NP.
- 在Zr4+兴奋剂后,NIR-II发光强度提高了8.4倍.
- 证明了为NIR-II成像应用设计的LaF3:Er3+NP的潜力.
结论:
- Zr4+ 兴奋剂显著增强了 LaF3:Er3+ NPs 的 NIR-II 发光.
- 控制合成为优化纳米探测器用于NIR-II成像提供了一个可行的途径.
- 这些发现为开发下一代NIR-II发光纳米探测器提供了宝贵的见解.
相关概念视频
Photoluminescence: Applications
341
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...
341
Total Internal Reflection Fluorescence Microscopy
5.6K
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
5.6K
Photoluminescence: Fluorescence and Phosphorescence
575
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...
575
Super-resolution Fluorescence Microscopy
6.8K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
6.8K

