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相关概念视频

Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

614
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.
614
Photoluminescence: Applications01:14

Photoluminescence: Applications

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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...
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相关实验视频

Updated: Jul 9, 2025

Fluorescence Lifetime Macro Imager for Biomedical Applications
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Fluorescence Lifetime Macro Imager for Biomedical Applications

Published on: April 7, 2023

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光寿命 香港奥曼德尔感应

Ashley Lyons1, Vytautas Zickus2,3, Raúl Álvarez-Mendoza2

  • 1School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK. ashley.lyons@glasgow.ac.uk.

Nature communications
|December 4, 2023
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的光寿命测量技术,实现了皮秒分辨率,大大改善了当前的方法. 这一进步使得研究快速的生物过程和物质相互作用成为可能.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 生物物理学的生物物理.
  • 材料科学 材料科学 材料科学

背景情况:

  • 时间域光终身成像显微镜 (FLIM) 传统上依赖于电子时间标记或门式探测器.
  • 目前的FLIM技术受到电子性能的限制,将时间分辨率限制在数百比秒.

研究的目的:

  • 开发一种新的光寿命测量技术,显著提高时间分辨率.
  • 为了证明这种技术对短光寿命的精确测量能力.
  • 引入一种新的无接触纳米古生物学方法,并探索研究快速生物过程中的应用.

主要方法:

  • 利用光子聚合统计数据进行光寿命测量.
  • 实现了皮秒时间尺度分辨率,仅依赖于参考脉冲持续时间.
  • 测量了各种染料的光寿命 (1.67 ps) 在1秒内.

主要成果:

  • 证明时间分辨率为10.1皮秒,超过了传统的电子方法.
  • 成功测量了多种染料的光寿命,准确度和速度很高.
  • 通过使用分子旋转器测量糖/水混合物粘度来验证该技术,展示了纳米修复学的应用.

结论:

  • 开发的光子聚合技术为光寿命测量提供了前所未有的时间分辨率.
  • 这种方法为研究超快的生物动力学和基本的光物理相互作用开辟了新的途径.
  • 该技术为无接触纳米神经学和先进材料表征提供了一个新的平台.