Ordered qausi-two-dimensional structure of nanoparticles in semiflexiblering polymer brushes under compression

TL;DR

This study uses Molecular Dynamics simulations to explore how semiflexible ring polymer brushes behave under compression, revealing their tendency to form ordered structures and high-density regions that influence nanoparticle arrangements.

Contribution

It demonstrates that semiflexible ring polymer brushes form ordered structures under compression, unlike flexible brushes, and influences nanoparticle packing, offering new insights for responsive material design.

Findings

Semiflexible brushes become ordered under compression.

High monomer density near the surface induces free energy peaks.

Nanoparticles form closely packed single layers in semiflexible brushes.

Abstract

Molecular Dynamics (MD) simulations are presented for a coarse-grained bead-spring model of ring polymer brushes under compression. Flexible polymer brushes are always disordered during compression, whereas semiflexible brushes tend to be ordered under sufficiently strong compression. Besides, the polymer monomer density of semiflexible polymer brush is very high near the polymer brush surface, inducing a peak value of free energy near the polymer brush surface. Therefore, by compressing nanoparticles (NPs) in semiflexible ring brush system, NPs tend to exhibit a closely packed single layer structure between the brush surface and the impenetrable wall, which provide a new access of designing responsive applications.