Spontaneous formation of complex micelles from homogeneous solution

TL;DR

This study uses mesoscopic simulations to explore how amphiphilic block copolymer solutions spontaneously form various complex micellar structures over time, revealing a rich phase diagram and formation pathways.

Contribution

It provides the first detailed simulation-based phase diagram and dynamical analysis of complex micelle formation from homogeneous solutions.

Findings

Multiple micelle types observed, including spherical, rodlike, vesicles, toroidal, and net-cage structures.

Dynamical pathways to different structures are characterized.

Control strategies for structure formation are discussed.

Abstract

We present an extensive computer simulation study of structure formation in amphiphilic block copolymer solutions after a quench from a homogeneous state. By using a mesoscopic field-based simulation method, we are able to access time scales in the range of a second. A phase diagram of final structures is mapped out as a function of the concentration and solvent-philicity of the copolymers. A rich spectrum of structures is observed, ranging from spherical and rodlike micelles and vesicles to toroidal and net-cage micelles. The dynamical pathways leading to these structures are analyzed in detail, and possible ways to control the structures are discussed briefly.