One-step reactivity-driven synthesis of core-shell structured electrically conducting particles for biomedical...

Area of Science:

• Materials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Electrically conductive and functional polymeric nanoparticles are crucial for biomedical applications like sensing and stimulation.
• Conventional synthesis of core-shell polymeric particles often involves complex multi-step processes or specialized macromolecule design.

Purpose of the Study:

• To develop a simple, one-step method for synthesizing electrically conductive core-shell polymer particles.
• To investigate the formation mechanism and properties of these particles for potential biomedical uses.

Main Methods:

• A one-pot emulsion polymerization method was employed using comonomers with differing reactivity.
• Particle morphology and chemistry were analyzed using SEM, TEM, XPS, FTIR, TGA, and elemental analysis.
• The functionalization capability was demonstrated by immobilizing anti-HSA onto the particle surface.

Main Results:

• A core-shell structure was successfully synthesized, featuring a highly conductive polypyrrole (PPy) core and a functional polypyrrole-co-(1-(2-carboxyethyl)pyrrole) (PPy-co-PPyCOOH) shell.
• A reactivity-driven mechanism involving five steps was proposed to explain the core-shell formation.
• The immobilized antibody on the particle surface showed reactivity towards Human Serum Albumin (HSA).

Conclusions:

• A facile one-step, one-pot emulsion polymerization method yields core-shell conductive polymer particles.
• The synthesis strategy is based on a novel comonomer reactivity-driven mechanism.
• These functionalized core-shell particles offer a promising platform for biomedical sensing and stimulation applications.