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Published on: August 26, 2018
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Striped, bioactive Ce-TiO2 materials with peroxynitrite-scavenging activity.
A Noel Gravina1, Juan M Ruso, Juan A Laiuppa
1Department of Chemistry, INQUISUR-CONICET, Universidad Nacional del Sur, 8000, Bahía Blanca, Argentina. pmessina@uns.edu.ar.
Journal of Materials Chemistry. B
|April 9, 2020
Summary
Researchers developed striped cerium-titanium dioxide (Ce-TiO2) nanostructures using a microemulsion method. These biocompatible materials mimic the extracellular matrix, promote bone regeneration, and scavenge harmful peroxynitrite (ONOO-).
Area of Science:
- Biomaterials Science
- Nanotechnology
- Tissue Engineering
- Materials Chemistry
Background:
- Simulating the extracellular matrix (ECM) with aligned fiber micro-architectures is crucial for tissue regeneration.
- Controlling material structure to induce biological functions remains a significant challenge in regenerative medicine.
Purpose of the Study:
- To develop a bottom-up microemulsion-mediated strategy for creating bioactive and biocompatible striped Ce-TiO2 nanostructures.
- To investigate the ONOO- scavenging activity and bone-bonding capabilities of the synthesized nanomaterials.
Main Methods:
- Utilized a microemulsion-mediated synthesis to produce striped Ce-TiO2 nano-crystalline superstructures.
- Employed a bulkier organic ceria precursor to influence microemulsion droplet elasticity and nanoparticle alignment.
- Characterized the resulting nanostructures for morphology, phase stability, hydroxyapatite layer formation, and ONOO- degradation.
Main Results:
- Achieved highly bioactive and biocompatible striped Ce-TiO2 nanostructures with aligned prismatic anatase nanoparticles.
- Demonstrated enhanced stability of the anatase phase and accelerated formation of a bone-bonding hydroxyapatite layer.
- Confirmed significant peroxynitrite (ONOO-) scavenging activity, degrading it into less harmful nitrite and oxygen.
Conclusions:
- The microemulsion strategy successfully created aligned Ce-TiO2 nanostructures mimicking ECM for enhanced tissue regeneration.
- The synthesized nanomaterials exhibit excellent biocompatibility, bone-bonding potential, and antioxidant properties via ONOO- scavenging.
- This approach offers a promising route for developing advanced biomaterials for regenerative medicine applications.
