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Transparent cellulose sheets as synthesis matrices for inorganic functional particles.

Daniel Van Opdenbosch1, Philipp Maisch1, Gerhard Fritz-Popovski2

  • 1Department for Materials Science and Engineering - Glass and Ceramics, University of Erlangen-Nuremberg, Martensstraße 5, D-91058 Erlangen, Germany.

Carbohydrate Polymers
|October 19, 2021
PubMed
Summary

Researchers created flexible, luminescent cellulose sheets by incorporating europium. This novel fabrication method offers a versatile way to produce functional transparent cellulose materials for various applications.

Keywords:
Cellulose sheetsEuropium(III) fluoride phosphorPhotoluminescenceSmall angle X-ray scatteringTransmission electron microscopy

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Cellulose is a sustainable and abundant biopolymer.
  • Developing functional materials with tunable optical properties is crucial for advanced applications.
  • Transparent cellulose-based materials offer unique substrate possibilities.

Purpose of the Study:

  • To develop a method for fabricating transparent, luminescent cellulose sheets.
  • To incorporate europium trifluoride (EuF3) nanoparticles into a cellulose matrix.
  • To characterize the structural and optical properties of the resulting composite sheets.

Main Methods:

  • Tape-casting a cellulose solution.
  • Incorporating europium trichloride and treating with ammonium fluoride to form europium trifluoride.
  • Characterization using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and small-angle X-ray scattering (SAXS).
  • Evaluation of photoluminescence emission spectra.

Main Results:

  • Successfully fabricated flexible, transparent cellulose sheets.
  • Identified europium trifluoride particles (200-500nm) composed of smaller crystallites (10-20nm).
  • SAXS analysis indicated oriented pores (approx. 12nm diameter) in supercritically dried samples.
  • Observed characteristic Eu3+ emission bands between 580nm and 700nm.

Conclusions:

  • A versatile method for creating functional transparent cellulose structures was developed.
  • The process allows for the embedding of various functional particles within cellulose.
  • The resulting luminescent cellulose sheets hold potential for applications in optoelectronics and photonics.