Onion-like microspheres with tricomponent from gelable triblock copolymers

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Block copolymers enable the creation of complex nanostructures through self-assembly.
• Functional groups within polymers allow for post-assembly modification and templating.
• Aerosol-assisted methods offer precise control over particle formation.

Purpose of the Study:

• To synthesize onion-like functional microspheres with a layered structure.
• To develop a method for creating organic/inorganic hybrid spheres.
• To utilize these spheres as templates for nanoparticle synthesis and subsequent nanoplate formation.

Main Methods:

• Aerosol-assisted self-assembly of poly(3-(triethoxysilyl)propyl methacrylate)-block-polystyrene-block-poly(2-vinylpyridine) (PTEPM-b-PS-b-P2VP).
• Self-gelation reaction within the PTEPM layers to form hybrid spheres.
• Entrapment of gold ions and subsequent reduction to form gold nanoparticles within P2VP layers.
• Acid-induced disassembly of microspheres to yield nanoplates.

Main Results:

• Successfully fabricated onion-like microspheres with three alternating layers.
• Achieved highly ordered concentric curved lamellar structures in organic/inorganic hybrid spheres.
• Demonstrated the formation of gold nanoparticles within specific layers of the microspheres.
• Obtained sandwich-like nanoplates with curved morphology after sphere disassembly.

Conclusions:

• The developed method allows for the controlled synthesis of complex, multi-layered hybrid nanostructures.
• The onion-like microspheres serve as effective templates for creating patterned nanomaterials.
• The resulting nanoplates exhibit unique curved morphologies with potential applications in catalysis or electronics.