Related Experiment Video
Updated: Jun 27, 2026
10:16
Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
Published on: January 8, 2016
14.3K
Time-Dependent Photothermal Modulation on Electroactive Gr/PVTF Composite Films for Enhancing Bone Regeneration.
Chengwei Wu1,2, Zhiyuan Zhou1, Weiming Lin1
1School of Materials Science and Engineering, National Key Laboratory of Silicon and Advanced Semiconductor Materials, Institute of Wenzhou, Zhejiang University, Hangzhou, 310027, China.
Advanced Healthcare Materials
|November 13, 2025
Summary
This study developed graphene/PVTF composite films that use surface potential and photothermal stimulation to enhance bone regeneration by modulating macrophage polarization and promoting osteogenesis in bone marrow mesenchymal stem cells.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Effective bone regeneration requires precise control over macrophage polarization and osteogenesis.
- Existing methods often lack the ability to dynamically modulate cellular responses for optimal healing.
Purpose of the Study:
- To design and evaluate composite films capable of simultaneous surface potential and photothermal stimulation for enhanced bone regeneration.
- To investigate the synergistic effects of these physical cues on macrophage polarization and osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs).
Main Methods:
- Fabrication of composite films using graphene nanosheets (Gr) and poly(vinylidene fluoride-trifluoroethylene) (PVTF) with varying Gr content.
- Characterization of the films' crystalline, piezoelectric, and photothermal properties.
- Assessment of the films' effects on macrophage polarization (M1/M2) and osteogenic differentiation of BMSCs in vitro.
- Evaluation of bone regeneration in a cranial defect model in vivo.
Main Results:
- The 0.3 wt.% Gr composite film exhibited optimal photothermal, crystalline, and piezoelectric properties.
- Electrically polarized films induced optimal osteogenic differentiation of BMSCs under specific illumination.
- Surface potential modulated macrophage polarization, with photothermal stimulation promoting a shift towards M2 polarization.
- Synergistic effects of surface potential and photothermal stimulation significantly enhanced bone regeneration in vivo.
Conclusions:
- Graphene/PVTF composite films offer a promising strategy for time-dependent modulation of macrophage polarization and osteogenesis.
- The combination of surface potential and photothermal stimulation provides a synergistic approach to enhance bone regeneration.
- This study highlights the potential of multi-physical cue stimulation in tissue engineering and regenerative medicine.
