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Updated: Sep 21, 2025

Synthesis of Monodisperse Cylindrical Nanoparticles via Crystallization-driven Self-assembly of Biodegradable Block Copolymers

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Published on: June 20, 2019

Solution-Based Thermodynamically Controlled Conversion from Diblock Copolymers to Janus Nanoparticles.

Zhen Zhang¹, Haodong Li¹, Xiayun Huang¹

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

ACS Macro Letters

|June 2, 2022

Summary

This summary is machine-generated.

Researchers developed a highly efficient two-step method to create nanosized polymeric Janus particles (NPJPs). This thermodynamically controlled process yields nearly 100% conversion, enabling versatile NPJP fabrication.

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Area of Science:

Polymer Science
Materials Chemistry
Nanotechnology

Background:

Nanosized polymeric Janus particles (NPJPs) are crucial for diverse scientific and industrial applications.
Existing methods for NPJP synthesis are often inefficient and lack versatility.

Purpose of the Study:

To develop a highly efficient and versatile method for preparing NPJPs.
To achieve near-complete conversion in NPJP synthesis through a thermodynamically controlled process.

Main Methods:

A two-step preparation involving diblock copolymer micellization and subsequent intramicellar cross-linking.
Formation of mixed shell micelles (MSMs) from A-b-B and C-b-B diblock copolymers.
Thermodynamically controlled covalent cross-linking of A block chains within MSMs to induce phase separation and yield NPJPs.

Main Results:

Achieved near 100% conversion efficiency in the synthesis of NPJPs.
Demonstrated the method's applicability to different polymer systems.
Showcased the ability to tune the Janus balance of the synthesized particles.

Conclusions:

The reported two-step, thermodynamically controlled method offers a significant advancement in NPJP fabrication.
This approach provides a versatile and highly efficient route for producing NPJPs with tunable properties.
The developed technique holds great promise for the broader application of NPJPs.