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相关概念视频

Photoluminescence: Applications01:14

Photoluminescence: Applications

431
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...
431
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

534
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...
534
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

648
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.
648
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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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.
A pair of electrons in a...
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全彩持续室温光弹性体,具有强大的光学性能.

Juan Wei1, Mingye Zhu1, Tingchen Du1

  • 1State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications (NUPT), Nanjing, 210023, P. R. China.

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|August 10, 2023
PubMed
概括

研究人员开发了新的,高度可拉伸的,多色持续发光弹性体,用于灵活的电子产品. 这些材料即使在变形时也保持明亮的光辐射,为先进的应用提供独特的特性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 光电学是指光电子产品.

背景情况:

  • 持久的室温光材料 (RTP) 对灵活的电子和光子学至关重要.
  • 开发具有独特机械和光学性能的RTP材料仍然具有挑战性.
  • 现有的材料往往缺乏先进应用所需的伸展性和耐久性.

研究的目的:

  • 为了合成和表征高度可拉伸,多色持续发光弹性体.
  • 研究这些新型弹性体的机械和光学特性.
  • 探索它们在灵活的电子和光子设备中的潜在应用.

主要方法:

  • 将离子RTP聚合物和聚乙烯醇纳入聚二甲基氧 (PDMS) 基质.
  • 使用共聚焦光显微镜,扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 的表征.
  • 评估机械性能,包括可伸缩性和在变形下光学强度.

主要成果:

  • 成功生产了高度可拉伸,轻量级和多色持续发光弹性体.
  • 材料在365nm激发后表现出高光学透明度和明亮的RTP.
  • 用显微镜技术证实PDMS矩阵内的聚合物均分布.
  • 在广泛的机械变形下,证明了令人满意的伸展性和前所未有的光学特性维护.

结论:

  • 开发的持久发光弹性体具有独特的机械灵活性和强大的光学性能组合.
  • 这些材料是下一代可穿戴设备,柔性显示器和防伪技术的理想候选者.
  • 这项工作促进了对功能光材料的开发,以满足苛刻的应用.