3ADVANCES IN THE MOLECULAR SIMULATION OF MICROPHASE FORMERS

PATRICK CHARBONNEAU1 and KAI ZHANG2

1Department of Chemistry and Department of Physics, Duke University, Durham, NC, USA

2Division of Natural and Applied Sciences, Duke Kunshan University, Kunshan, Jiangsu, China

INTRODUCTION

Vapor leaves a boiling liquid, and oil floats above the aqueous fraction in a demixing vinaigrette. Such gas–liquid (or liquid–liquid) phase separations are ubiquitous. They occur in systems whatever their constituents may be—atoms, small molecules, proteins, polymer chains, colloids, etc.—as long as these components effectively interact through attractive forces sufficiently strong to compete with thermal noise. As attraction weakens compared to this noise, a critical temperature, upper T Subscript c, is eventually reached, at which point the two (bulk) phases become indistinguishable and thus form a single homogeneous fluid (Figure 1a).

Schematic illustration of temperature T, density ρ, frustration ξ phase diagram for model microphase formers.

FIGURE 1 Schematic temperature upper T, density rho, frustration xi phase diagram for model microphase ...

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