ABC triblock terpolymer self-assembled core-shell-corona nanotubes with high aspect ratios

Area of Science:

• Polymer Chemistry
• Materials Science
• Nanotechnology

Background:

• Fabricating pure nanotubes via block copolymer self-assembly is challenging.
• Nanotubes' unique 1D hollow structure attracts significant research interest.

Purpose of the Study:

• To report the successful preparation of pure core-shell-corona (CSC) nanotubular micelles.
• To investigate the self-assembly mechanism of triblock terpolymers into nanotubes.
• To demonstrate the selective incorporation of gold nanoparticles into CSC nanotubes.

Main Methods:

• Self-assembly of poly(styrene-b-4-vinyl pyridine-b-ethylene oxide) triblock terpolymer.
• Utilizing binary organic solvents and solution thermal annealing.
• Direct visualization of trapped intermediates to elucidate the formation pathway.

Main Results:

• Achieved uniform diameter and high aspect ratio CSC nanotubular micelles.
• Identified a novel formation pathway involving sphere-to-cylinder-to-nanotube transformation with a solid-to-hollow transition.
• Demonstrated selective gold nanoparticle incorporation into different domains of the CSC nanotubes.

Conclusions:

• The study presents a successful method for fabricating pure polymer nanotubes.
• A distinct self-assembly mechanism leading to nanotube formation was elucidated.
• The CSC structure enables selective nanoparticle loading, suggesting potential applications in nanoscience and nanotechnology.