3D Orientation Imaging of Polymer Chains with Polarization-Controlled Coherent Raman Microscopy.

ABSTRACT: Despite the ubiquity of three-dimensional (3D) anisotropic materials, their 3D molecular alignment cannot be measured using conventional two-dimensional (2D) polarization imaging. Here, we present images of the 3D angles of molecular orientations with submicrometer spatial resolution acquired through polarization-controlled coherent anti-Stokes Raman scattering microscopy. The hyperspectral Raman data of a polyethylene (PE) film were converted into images, showing the polymer chains' 3D angles and order parameters. The 3D orientation images of PE chains in ring-banded spherulites show that the azimuthal angles of the chains are perpendicular to the crystal growth direction, while the out-of-plane angles display limited-range oscillations synchronous with ring banding. The prevailing crysta

SUBMITTER: Xu S 

PROVIDER: S-EPMC9795402 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature