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相关概念视频

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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Photoluminescence: Fluorescence and Phosphorescence01:23

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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.
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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...
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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.
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从竹子中生产光活性室温光玻璃.

Shaodi Zhang1, Yingxiang Zhai2,3, Jingyi Zhou2,3

  • 1Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China.

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研究人员开发了一种可持续的,机械强大的竹-环氧复合玻璃,带有光激活室温光 (RTP). 这种材料通过消耗和重新扩散氧气来动态地打开/关闭发光,从而使先进的光学应用成为可能.

关键词:
三维发光架构的3D发光架构.竹子 竹子 竹子机械强度 机械强度 机械强度可以通过光学激活.在室温光灯.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光子学是指光子学的使用方法.
  • 可持续工程 可持续工程

背景情况:

  • 在先进的光子应用中,开发机械坚固和可持续的光活性材料至关重要.
  • 室温光 (RTP) 材料经常面临氧气火和有限的可调性方面的挑战.

研究的目的:

  • 为了创建一个可持续的,机械强的光激活室温光玻璃 (RTP).
  • 研究开发材料的光激活机制和动态发光切换能力.
  • 探索这种材料在3D发光架构和光学数据存储方面的潜力.

主要方法:

  • 透环氧树脂到一个delignified竹框架,以创建一个复合材料 (B-玻璃).
  • 描述B型玻璃的机械性能 (拉伸和冲击强度).
  • 研究RTP发射,使用紫外线照射的光激活过程以及氧气火/再扩散动态.

主要成果:

  • 乙级玻璃表现出异常的机械强度 (拉力:133MPa;冲击:55.6kJ·m-2).
  • 通过紫外线照射 (365 nm) 的光激活消耗了被困的氧气,将RTP寿命从21.1 ms延长到180.9 ms.
  • 可逆氧气扩散可实现动态开/关发光开关,展示了一个响应敏捷的光子平台.

结论:

  • 开发的B玻璃是一种可持续的,机械坚固的材料,具有可调节的RTP特性.
  • 该材料为自适应光子技术提供了一个新的平台,包括3D发光结构和多层光学数据存储.
  • 这项工作提出了对RTP材料的环保方法,具有可扩展的制造和多种应用的潜力.