Liquid-Solid Interfacial Fusion Assembly Enables the Precision Fabrication of Block Copolymer Vesicles

Area of Science:

• Polymer Science
• Materials Science
• Nanotechnology

Background:

• Amphiphilic block copolymers self-assemble into polymersomes for applications in gene therapy, nanoreactors, and biosensing.
• Traditional self-assembly methods often present challenges in complexity, time efficiency, and structural control.

Purpose of the Study:

• To introduce a versatile and scalable approach, liquid-solid interfacial fusion assembly (LSIFA), for synthesizing monodisperse block copolymer vesicles.
• To demonstrate LSIFA's ability to achieve tunable composition, size, morphology, and permeability.
• To overcome limitations of conventional methods requiring specific copolymer structures.

Main Methods:

• Utilizing kinetic studies to understand the gradual fusion assembly of block copolymer spheres at a liquid-solid interface.
• Conducting systematic analyses to identify key factors governing the LSIFA process.
• Confirming the universality of the LSIFA method across different copolymer systems.

Main Results:

• LSIFA enables the synthesis of monodisperse block copolymer vesicles with controlled properties.
• The process involves the gradual fusion of block copolymer spheres adsorbed at a liquid-solid interface.
• Key factors influencing LSIFA were identified, and the method's universality was confirmed.
• LSIFA overcomes the need for specific copolymer packing parameters required by conventional methods.

Conclusions:

• LSIFA provides a significant advancement for fabricating a wide range of well-defined block copolymer vesicles.
• The method offers precise control over vesicle characteristics, overcoming limitations of traditional techniques.
• The developed technique has enormous potential for applications in drug delivery, materials science, and other fields.