Hierarchically ordered supramolecular protein-polymer composites with thermoresponsive properties
Salla Välimäki1, Joona Mikkilä2, Ville Liljeström3,4
1Biohybrid Materials Group, Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, 00076 Aalto, Finland. salla.valimaki@aalto.fi.
International Journal of Molecular Sciences
|May 8, 2015
Summary
Researchers developed novel stimuli-responsive copolymers that self-assemble with Pyrococcus furiosus ferritin protein cages into crystalline arrays. These biohybrid materials exhibit negative thermal expansion, enabling temperature-controlled behavior for advanced applications.
Area of Science:
- Biohybrid materials science
- Polymer chemistry
- Nanotechnology
Background:
- Synthetic macromolecules are crucial for biohybrid materials.
- Active systems require materials responsive to external stimuli.
- Protein-templated self-assembly offers advanced material design.
Purpose of the Study:
- To synthesize stimuli-responsive diblock copolymers for protein complexation.
- To create crystalline arrays of Pyrococcus furiosus ferritin protein cages.
- To investigate the thermoresponsive behavior of the resulting biohybrid materials.
Main Methods:
- Synthesis of cationic multivalent dendron-linear thermoresponsive polymer diblock copolymers.
- Dynamic Light Scattering (DLS) for cloud point determination and complexation analysis.
- Small-angle X-ray scattering (SAXS) and Transmission Electron Microscopy (TEM) for structural analysis.
Main Results:
- Successful binding and complexation of Pyrococcus furiosus ferritin with the diblock copolymers.
- Formation of crystalline arrays with a face-centered cubic (fcc) Bravais lattice (a=18.6 nm).
- The resulting complexes exhibit negative thermal expansion, indicating stimuli-responsive behavior.
Conclusions:
- Developed novel stimuli-responsive polymers for templating protein self-assembly.
- Achieved ordered crystalline arrays of protein cages with tunable properties.
- Demonstrated the potential of these biohybrid materials for applications requiring temperature-dependent responses.
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