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Related Concept Videos

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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Variables Affecting Phosphorescence and Fluorescence01:26

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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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Related Experiment Video

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Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials
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Ultralong-Lived and Color-Tunable RTP in Biodegradable Natural Fibers Based Textiles for Wearable Security and

Huie Jiang1, Lin Yang1, Haiyan Ju2

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

Small (Weinheim an Der Bergstrasse, Germany)
|November 10, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed eco-friendly, biodegradable room-temperature phosphorescent (RTP) fibers using collagen and polyvinyl alcohol. These advanced RTP fibers offer long-lasting afterglow and adjustable colors for smart textiles and anti-counterfeiting applications.

Keywords:
biodegradable natural fiberscollagenluminescent textilesroom‐temperature phosphorescent (RTP) materials

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Biotechnology

Background:

  • Developing safe, eco-friendly, and long-lasting room-temperature phosphorescent (RTP) materials is crucial for advanced optoelectronic applications.
  • Existing RTP materials often face challenges related to safety, color tunability, and environmental impact.

Purpose of the Study:

  • To create biodegradable RTP fibers with adjustable colors and ultra-long phosphorescence.
  • To explore the potential of these fibers in smart textiles, anti-counterfeiting, and human-machine interfaces.

Main Methods:

  • Co-integration of natural collagen (Col) and polyvinyl alcohol (PVA) using wet spinning technology.
  • Incorporation of aromatic amine phosphors to achieve tunable multi-color emission (green, blue, yellow).
  • Characterization of RTP properties, including phosphorescent lifetime and afterglow duration.

Main Results:

  • Achieved biodegradable RTP fibers (Col/PVA/T, Col/PVA/B, Col/PVA/A) with phosphorescent lifetime up to 1.89 seconds and afterglow exceeding 14 seconds.
  • Demonstrated modular design for adjustable multi-color emission.
  • Fibers exhibit excellent mechanical flexibility, moisture permeability (1902 g m-224 h-1), and air permeability (368 mL cm-2h-1).

Conclusions:

  • The developed Col/PVA-based RTP fibers offer a sustainable and high-performance alternative for luminescent textiles.
  • These materials show significant potential for anti-counterfeiting systems with time-resolved encryption and dynamic wearable displays.
  • This research establishes a new direction for eco-friendly luminescent materials in photonic applications.