Anisotropic PCL nanofibers embedded with nonlinear nanocrystals as strong generators of polarized second harmonic light and piezoelectric currents.

ABSTRACT: Using the electrospinning technique nanofibers consisting of organic nonlinear optical 3-nitroaniline (3NA, C₆H₆N₂O₂) nanocrystals embedded in poly-ε-caprolactone (PCL) polymer, 3NA@PCL nanofibers, were produced. Polarimetry optical second harmonic generation and X-ray diffraction studies show that 3NA push-pull molecules crystallize inside the polymer fibers with a strong preferential orientation giving rise to an alignment of the molecular dipole moments along the nanofibers longitudinal axis. This alignment strongly enhances the second order nonlinear optical response of the fibers. Intense second harmonic generation emission was observed from a single nanofiber, corresponding to an effective second order susceptibility of 80 pm V^-

SUBMITTER: Bernardo CR 

PROVIDER: S-EPMC9419582 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature