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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
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Updated: Jun 4, 2026

Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
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Published on: February 9, 2012

Precisely controlling full-color nanofilms for multi-level spatial-time-evolved via phosphorescence decay.

Hui Liu1, Hongli Dai1, Guoguo Chang1

  • 1Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China.

Carbohydrate Polymers
|June 2, 2026
PubMed
Summary

Researchers developed a novel full-color nanofilm using cellulose nanocrystals (CNC) for advanced information encryption. This material offers ultra-long lifetime organic room-temperature phosphorescent (ORTP) properties, enabling secure, multi-level anti-counterfeiting solutions.

Keywords:
Cellulose nanocrystalFull-color nanofilmsMulti-level information encryptionOrganic room-temperature phosphorescentPrecisely controlling

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Last Updated: Jun 4, 2026

Fluorescence Lifetime Imaging of Molecular Rotors in Living Cells
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Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
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Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells

Published on: June 30, 2018

Area of Science:

  • Materials Science
  • Organic Chemistry
  • Nanotechnology

Background:

  • Organic room-temperature phosphorescent (ORTP) materials are crucial for advanced applications like information encryption.
  • Precisely controlling phosphorescent properties, such as lifetime and color, remains a challenge for ORTP materials.
  • Developing sustainable and rigid matrices enhances the stability and performance of ORTP systems.

Purpose of the Study:

  • To construct a full-color nanofilm with controllable, ultra-long lifetime ORTP properties.
  • To investigate the role of cellulose nanocrystals (CNC) in enhancing phosphorescent characteristics.
  • To develop a multi-level information encryption system based on the tunable ORTP material.

Main Methods:

  • Synthesized a nanofilm using a rigid-structure enhanced ORTP donor and a molecular acceptor bridged by CNC.
  • Utilized CNC to induce polymerization and create a denser hydrogen bond environment, enhancing spin-orbit coupling.
  • Employed a Förster-resonance energy transfer (FRET) system with varying rhodamine B dopants to control phosphorescence.

Main Results:

  • Achieved an extended phosphorescence lifetime of 2.03 s and an absolute quantum yield of 29.54%.
  • Demonstrated precise control over phosphorescent properties (intensity, lifetime, color) by modifying the acceptor dopant.
  • Successfully developed a multi-level information encryption system leveraging tunable ORTP characteristics and response to ofloxacin.

Conclusions:

  • This work presents a new strategy for enhancing phosphorescence lifetime and precisely controlling ORTP properties.
  • The developed nanofilm offers a promising platform for high-level anti-counterfeiting and secure information encryption.
  • The integration of CNC provides a sustainable approach to advanced functional materials.