Chiral poly(fluorene-alt-benzothiadiazole) (PFBT) and nanocomposites with gold nanoparticles: plasmonically and structurally enhanced chirality

Heong Sub Oh; Sha Liu; HongSub Jee; Alexander Baev; Mark T Swihart; Paras N Prasad

doi:10.1021/ja107064a

Chiral poly(fluorene-alt-benzothiadiazole) (PFBT) and nanocomposites with gold nanoparticles: plasmonically and structurally enhanced chirality

J Am Chem Soc. 2010 Dec 15;132(49):17346-8. doi: 10.1021/ja107064a. Epub 2010 Nov 19.

Authors

Heong Sub Oh¹, Sha Liu, HongSub Jee, Alexander Baev, Mark T Swihart, Paras N Prasad

Affiliation

¹ Institute for Lasers, Photonics and Biophotonics, Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260, USA.

PMID: 21090623
DOI: 10.1021/ja107064a

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.