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Periodic Patchy Spheres Self-Assembled by ABCA^' Multiblock Terpolymers.

Xiaohui Zhang¹, Weihua Li¹

¹State Key Laboratory of Molecular Engineering of Polymers, Key Laboratory of Computational Physical Sciences, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|March 30, 2022

Summary

Researchers engineered multiblock terpolymers to create self-assembled patchy spheres. This study clarifies how polymer architecture controls the number of patches on these complex nanostructures.

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Area of Science:

Polymer Science
Materials Science
Computational Chemistry

Background:

Designing complex polymer architectures is crucial for advanced materials.
Understanding self-assembly mechanisms is key to controlling nanostructure formation.

Purpose of the Study:

To design and study ABC multiblock terpolymers for self-assembly into patchy spheres.
To elucidate the regulation mechanism controlling the number of patches on these spheres.

Main Methods:

Utilizing self-consistent field theory (SCFT) simulations.
Constructing two-dimensional phase diagrams for various terpolymer architectures (A2BC A2', A2BC A3', A3BC A2').

Main Results:

Identified four stable patchy sphere phases (S2, S4, S5, S6) with varying patch numbers.
Observed a transition sequence S2 → S4 → S5 → S6 with increasing C-block fraction.
Demonstrated that A'-block and A-block arm numbers significantly influence phase stability and regioselectivity.

Conclusions:

The study provides a strategy for engineering patchy spheres through terpolymer design.
The findings offer insights into controlling the number of patches via polymer architecture and self-assembly.