Circular dichroism, surface-enhanced Raman scattering, and spectroscopic ellipsometry studies of chiral polyfluorene-phenylene films

Geon Joon Lee, Eun Ha Choi, Won Kyu Ham, Chang Kwon Hwangbo, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

To understand the chiroptical responses of polyfluorene- phenylene (PFP) films, circular dichroism (CD), surface-enhanced Raman scattering (SERS), attenuated total reflection (ATR), and spectroscopic ellipsometry studies were performed. The pristine PFP films exhibited significant CD at room temperature, and the chirality increased by thermal annealing at 120 °C (above the glass transition temperature). SERS and ATR spectra indicated that the chirality enhancement was due to the rearrangement of the polymer backbones on the glass substrate by thermal annealing and/or self-organization. In addition, comparison of PFP and polyfluorene polymers indicated that molecular structure of polymer backbone plays an important role in the chiroptical responses of the chiral polymers.

Original languageEnglish
Pages (from-to)767-781
Number of pages15
JournalOptical Materials Express
Volume6
Issue number3
DOIs
Publication statusPublished - 2016 Mar 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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