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Related Experiment Video

Updated: Jan 20, 2026

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Multi-mode optical coded patterns enabled by upconversion nanoparticles and photonic crystals.

Hanbing Zhang1, Linlin Xu1, Fenchao Liu1

  • 1College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.

Nanotechnology
|September 7, 2019
PubMed
Summary
This summary is machine-generated.

This study combines upconversion nanoparticles (UCNPs) and photonic crystals (PCs) to create enhanced luminescent composites. These novel materials enable multi-mode optical imaging and anti-counterfeiting applications through unique coding patterns.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Upconversion nanoparticles (UCNPs) offer unique luminescent properties.
  • Photonic crystals (PCs) exhibit tunable optical characteristics based on their structure.
  • Combining UCNPs and PCs can lead to novel composite materials with enhanced functionalities.

Purpose of the Study:

  • To design and prepare luminescent enhanced composites by integrating UCNPs and PCs.
  • To explore the creation of multi-mode coding patterns utilizing the optical properties of UCNPs and PCs.
  • To investigate the potential applications of these composites in optical imaging and anti-counterfeiting.

Main Methods:

  • UCNPs with varying luminescence properties were synthesized.
  • Composite materials were fabricated by spin-coating UCNPs onto PC surfaces.
  • Upconversion luminescent lattices were created on PC surfaces for coding, incorporating Morse code and cipher table patterns.

Main Results:

  • Significant luminescent enhancement was observed in the UCNP-PC composites.
  • The enhancement of upconversion luminescence was attributed to the Bragg reflection within the photonic band gap of PCs.
  • Multi-mode coding patterns, including Morse code and cipher tables, were successfully fabricated.
  • The composite materials demonstrated structural color from PCs and luminescence from UCNPs.

Conclusions:

  • The developed UCNP-PC composites exhibit significant luminescent enhancement.
  • These composites show great potential for multi-mode optical imaging applications.
  • The unique coding capabilities make these materials promising for advanced anti-counterfeiting strategies.