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Published on: March 5, 2019
Chiral poly(fluorene-alt-benzothiadiazole) (PFBT) and nanocomposites with gold nanoparticles: plasmonically and
Heong Sub Oh1, Sha Liu, HongSub Jee
1Institute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA.
Abstract:
Materials with large chiral optical activity at visible wavelengths are of great interest in photonics, particularly as a route to chiral optical metamaterials. Here, we demonstrate the plasmonic enhancement of the chiral optical activity of chiral poly(fluorene-alt-benzothiadiazole) (PFBT) doped with gold nanoparticles. The supramolecular helical organization of polymeric chains with simultaneous dipole-dipole interaction of the helically ordered nanoparticles with the polymer and one another results in unprecedented values of chirality parameter (κ ~0.02) at visible wavelengths in thin films.

