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Photoluminescence: Applications01:14

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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 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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在可生物降解天然纤维基础织品中的超长寿命和可调色RTP用于可穿戴安全和显示器.

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  • 1College of Bioresources Chemical and Materials Engineering, Institute of Biomass & Functional Materials, Shaanxi University of Science & Technology, Xi'an, 710021, China.

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可生物降解的天然纤维.原蛋白是一种原蛋白.发光织品是一种发光织品.室温光材料 (RTP) 是一种室温光材料.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光电学是指光电子产品.
  • 生物技术是生物技术.

背景情况:

  • 开发安全,环保和持久的室温光材料 (RTP) 对先进的光电子应用至关重要.
  • 现有的RTP材料经常面临与安全性,色彩调性和环境影响有关的挑战.

研究的目的:

  • 为了创建具有可调色色彩和超长光的可生物降解RTP纤维.
  • 探索这些纤维在智能织品,防伪和人机接口中的潜力.

主要方法:

  • 使用湿技术将天然原蛋白 (Col) 和聚乙醇 (PVA) 联合整合.
  • 加入芳氨酸,以实现可调节的多色发射 (绿色,蓝色,黄色).
  • 描述RTP特性,包括光寿命和光后持续时间.

主要成果:

  • 实现了可生物降解的RTP纤维 (Col/PVA/T,Col/PVA/B,Col/PVA/A),其光寿命高达1.89秒,后光超过14秒.
  • 经过证明的模块化设计,可调节多色发射.
  • 纤维具有出色的机械灵活性,水分透性 (1902 g m-2 24 h-1),以及空气透性 (368 mL cm-2 h-1).

结论:

  • 开发的基于Col/PVA的RTP纤维为发光织品提供了可持续和高性能的替代品.
  • 这些材料显示出具有时间解析加密和动态可穿戴显示器的防伪系统的巨大潜力.
  • 这项研究为光子应用中的环保发光材料建立了新的方向.