Light-induced deformation of side-chain azo-polymer: Insights from atomistic modeling

TL;DR

This paper uses atomistic modeling to understand how light causes deformation in azo-polymers, linking microscopic molecular behavior to macroscopic material changes.

Contribution

First application of fully atomistic force field modeling to study light-induced deformation in azo-polymers, connecting molecular details with macroscopic responses.

Findings

Captured microscopic chromophore behavior under illumination

Linked molecular dynamics to macroscopic deformation

Provided insights into anisotropic response mechanisms

Abstract

In this study, we apply, for the first time, the fully atomistic force field approach to modeling light-induced deformations of azo-polymers, thereby establishing a relationship between macroscopic parameters and the microscopic molecular architecture of the used azo-polymers. We apply an orientation potential to mimic the illumination of the sample, in which the action of light is represented through controlled redistribution of azo-chromophores relative to the polarization direction. This strategy allows us to capture both the microscopic details of chromophore behaviour and the collective, anisotropic response of the polymer matrix. By combining these complementary perspectives, the simulations not only resolve the local mechanism of light-induced motion but also provide a pathway to bridge molecular-scale dynamics with mesoscopic deformation phenomena in azo-polymer films.