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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
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.
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.
