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Updated: May 22, 2026

Synthesis of Graphene-Hydroxyapatite Nanocomposites for Potential Use in Bone Tissue Engineering
Published on: July 27, 2022
Bioactive rosette nanotube-hydroxyapatite nanocomposites improve osteoblast functions
Linlin Sun1, Lijie Zhang, Usha D Hemraz
1School of Engineering, Brown University, Providence, RI 02912, USA.
Synthetic organic molecules self-assembled into rosette nanotubes (RNTs) for novel injectable orthopedic materials. These TBL/HA/pHEMA composites show promising mechanical strength and enhanced bone cell function.
Area of Science:
- Biomaterials Science
- Organic Chemistry
- Nanotechnology
Background:
- Rosette nanotubes (RNTs) inspired by DNA bases offer unique properties for advanced materials.
- Injectable orthopedic materials are needed for next-generation bone repair and regeneration.
Purpose of the Study:
- To synthesize self-assembling twin base linkers (TBL) and create TBL/HA/pHEMA composites.
- To evaluate the properties and cytocompatibility of these novel injectable orthopedic materials.
Main Methods:
- Synthesis of TBL molecules and their self-assembly into RNTs.
- Fabrication of TBL/HA/pHEMA composites with varying hydroxyapatite (HA) nanoparticle content.
- Characterization of solidification time, surface morphology, mechanical properties, and osteoblast/fibroblast cell behavior.
Main Results:
- Optimized composites solidified within 2-40 minutes.
- Composites with 20 wt% HA exhibited mechanical strength comparable to natural vertebral discs.
- Enhanced osteoblast function (collagen synthesis, ALP activity, calcium deposition) and inhibited fibroblast adhesion were observed.
Conclusions:
- TBL/HA/pHEMA composites are promising injectable orthopedic materials.
- These materials demonstrate potential for improved bone regeneration and reduced fibrous tissue formation.
- Further in vitro and in vivo studies are warranted to explore their full potential.
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